898 words - 4 pages
The Effect of Temperature on Enzyme Activity
The purpose of this lab practice is to investigate the effects of temperature on the denaturation of enzymes.
Introduction: The main biological concept explored was enzyme activity, enzymes are biological molecules (proteins) that act as catalysts and help complex reactions occur everywhere in life. Enzymes are impacted by temperature and pH of their environment, because these factors can denature an enzyme. Denaturing an enzyme is the process of altering the shape of an enzyme, making it unable to serve its proper function. The independent variable in this experiment is the temperature of the catalase (enzyme). The dependant variable is the
VIEW DOCUMENT
2741 words - 11 pages
Abstract
This experiment investigates how changing the temperature of water will affect the rate of osmosis of water into the potato cubes. This relates to a specific biological process in the body such as osmosis of water between the extracellular fluid of blood and the red blood cells. By investigating, the effect of temperature on this process of osmosis will allow better understanding and ultimately answering the question of- how does changing human body temperature (eg. fever, hypothermia, hyperthermia) effect hydration levels of red blood cells in the body? It is hypothesised that increasing the temperature will cause the rate of osmosis to increase at a faster rate due to the
VIEW DOCUMENT
699 words - 3 pages
Red Kangaroo: Macropus RufusThe Kangaroo is an endotherm. Endotherms generate heat from their body's metabolism. So their internal body temperature is independent of the external temperature. Endotherms eat more food than ectotherms. This higher food intake results in an increased level of metabolism, which is required to produce heat.The Red Kangaroo inhabits inland plains throughout Australia. They prefer open plains where trees and bushes are scarce.The fur on Kangaroos maintains an insulating layer of trapped air that slows down heat exchange with the environment. The thickness of the air layer can be increased in cold conditions by contracting muscles that lift the fur away from the
VIEW DOCUMENT
2861 words - 12 pages
Short Communication
Over-Winter Channel Bed Temperature Regimes Generated by Contrasting Snow
Accumulation in a High Arctic River
ABSTRACT
We report experimental results of near-surface winter temperatures along and adjacent to the channel bed of a High Arctic river on Melville Island, Canada. Temperature loggers 5 cm below the ground surface in areas where the terrain suggests varying snow accumulation patterns revealed that the maximum winter difference between air and near-surface temperatures ranged from 0 to +30°C during the winter of 2012–13, and that shallow near-surface freezing conditions were delayed for up to 21 days in some locations. Cooling to -10°C was delayed for up to 117
VIEW DOCUMENT
1801 words - 8 pages
Candle Practical Report
Rebekah Flood
Introduction
The aim of the experiment is to determine how the temperature of the candle’s surrounding area
affects the time taken for the flame to extinguish.
A chemical reaction is the formation of a new substance. Combustion is a chemical reaction
because it produces a new substance. This is evident as colour, odour, heat and light are
produced. Oxygen and fuel are required for a flame to burn. A candle burns through using liquid
wax as a fuel which has been melted by the flame, then drawn up the wick. This wax is then
vaporised and broken down into hydrogen and carbon molecules (National Candle Association,
2017). These molecules move up the flame
VIEW DOCUMENT
939 words - 4 pages
Heat Transfer from Extended Surfaces
(EDITED)
May 10, 2019
Prepared by: Nabeel Abrar
Katherine Ramirez
Gamma Industries, Inc.
Executive Summary
How does heat flow in one dimension? This particular apparatus investigated the transient and steady-state temperatures along an alloy rod. In the experiment, a rod was heated at one end over the time span of an hour. Progressively, the temperature down the length of the rod increased, this was monitored by thermocouples. The apparatus’ alloy rod consisted of several embedded thermocouples which read the temperatures at 5 cm increments along the rod length. At the very beginning of the experiment, the temperature of the rod is uniform and at room
VIEW DOCUMENT
895 words - 4 pages
NFHS – Chem I - HONORS Calorimetry Lab – Specific Heat of a Metal
Calorimetry Lab – Specific Heat of a Metal
Abstract
Chemists can identify substances on the basis of their chemical and physical properties. One unique physical property of a substance is the amount of energy it will absorb per unit of mass. This property can be measured quite accurately and is called specific heat (Cp). Specific heat is the amount of energy measured in joules, needed to raise the temperature of one gram of the substance one Celsius degree. Often applied to metallic elements, specific heat can be used as a basis for comparing energy absorption and transfer.
To measure specific heat in the laboratory, a
VIEW DOCUMENT
491 words - 2 pages
·
The Effect of Temperature on Cell Membranes
By Stephanie Chandler; Updated March 13, 2018
toeytoey2530/iStock/GettyImages
A membrane surrounds every living cell, keeping the cell's interior separated and protected from the outside world. Many factors affect how this membrane behaves and temperature is one of the most important. Temperature helps determine what can enter or leave the cell and how well molecules found within the membrane can function. Temperatures that are too high or too low can seriously damage and, in the extreme temperature ranges, kill the cell through their effect on the cell's membrane.
What Makes a Cell Membrane?
A cell membrane is called a bilayer because it's made
VIEW DOCUMENT
1253 words - 6 pages
1
The International Standard Atmosphere (ISA)
Mustafa Cavcar* Anadolu University, 26470 Eskisehir, Turkey
Nomenclature a = speed of sound, m/sec g = acceleration of gravity, m/sec2 h = altitude, m or ft p = pressure, N/m2 or hPa R = real gas constant for air, 287.04 m2/°Ksec2
T = temperature, °K or °C ρ = density, kg/m3 Subscripts 0 = standard sea level conditions 11 = tropopause caonditions Abbreviations ICAO = International Civil Aviation Organization ISA = International Standard Atmosphere MSL = Mean Sea Level PA = Pressure Altitude
1. Standard Atmosphere Modeling For purposes of pressure altimeter calibrations, aircraft and rocket performance and their design, and so
VIEW DOCUMENT
2012 words - 9 pages
physicist/mathematician, Evangelista Torricelli invented the barometer to measure atmospheric
pressure and proved that gases have matter. The common belief was that gases (or “air”) had no
matter at all was and this was overturned by Torricelli’s invention of the barometer. We can
involve pressure in our everyday lives by a vacuum cleaner. When a vacuum cleaner is turned, the
vacuum sucks air from inside the cleaner and the pressure becomes lower than the surrounding
atmosphere which causes the atmospheric (surrounding) pressure to have more force causing the
air and dirt/dust to be force back inside the vacuum cleaner.
Second, is the property of temperature which also has a huge impact on
VIEW DOCUMENT
2344 words - 10 pages
The Effect of Temperature on a
Catalytic Decomposition of Hydrogen Peroxide
2018
Contents:
Introduction 3
Hypothesis 3
Variables 3
Experimental Plan 4
Results 5
Data Processing 6
Discussion 7
Conclusion 8
Evaluation 8
Introduction:
The aim of this investigation is to analyze the effects different reaction temperatures have on reaction rates and the relationship that exists between them. The reaction occurring will be the catalytic decomposition of Hydrogen Peroxide with the assistance of the catalyst, Potassium Iodide. The decomposition of Hydrogen Peroxide,
Is, in normal circumstances, a very slow reaction but to increase
VIEW DOCUMENT
510 words - 3 pages
General Chemistry II
Thermochemistry
Name:_________________________________________
Section: _____________ Score:______________
Date: _____________ (Wag mo ako lokohin! Wala ka nun. HAHAHAHAH)
Problem Set #1
1. A piece of an unknown metal weighs 550. g and requires 9.315 kJ of energy to increase its temperature from 22.0 °C to 65.2 °C. What is the specific heat capacity of the metal?
2. What is the final temperature of a 275 kg sample of water, initially at 19.5 °C, if 36.5 kJ of heat were added to it? The specific heat capacity of water is 4.18 J/g°C.
3. A 45.0 g piece of aluminum, which is initially at 19.5 °C, is placed in
VIEW DOCUMENT
1126 words - 5 pages
products of oxygen gas (O2) and liquid water (H2O), hence producing a decomposition reaction. Evidently when a decomposition reaction occurs oxygen is the by product and escapes creating prominence of bubbles and heat within the test tube. The higher the efficiency and activity levels of the catalase within the liver the more heat produced in the test tube catalase and h2o2 are directly proportional to one another. Theoretically, enzyme catalase should be most active at internal body temperatures, as internal body temperature is their biological habitat.
This reaction equation can be represented as
2H202 2H20 + O2 * the arrow represents the in the liver catalase reaction
VIEW DOCUMENT
426 words - 2 pages
Richard KazmiMr.HickeyChemistry3/19/13Calorimetry Lab ReportPurpose: Calorimetry is the measurement of the heat flow into or out of a system for chemical and physical purposes. The purpose of this lab was to use calorimetry to find how much heat is absorbed or released when NaCl is dissolved in water. In this case, we will find the heat coming out of the system, in a chemical process.Hypothesis: Once the sodium chloride is put into the water, the temperature of the water will rise.Procedure:1. Fill up a beaker with 25ml water2. Pour water into Calorimeter (we had 35 ml)3. Put in 2 grams of NaCl4. Close the top5. Put in Thermometer6. Record starting temperature7. Use the stirrer to help stir
VIEW DOCUMENT
936 words - 4 pages
CHE Team Challenge 1
Conclusion and Recommendations
The purpose of the double pipe heat exchanger is to regulate running hot and cold water to attain a range of temperature by opening and closing valves. This is achieved by figuring out the LEGO NXT program for the NXT Brick. Team members worked together to examine the program and all of its properties. Each team was given a basic structure of the program; however the program had to have minor adjustments for the team to solve. Once adjustments were fixed, the team tested the software to assure the program was conclusive. The motor managed to spin to be able to open and close the valves to manage the set temperature range. The team was
VIEW DOCUMENT
634 words - 3 pages
beakers weighing cup(s)
massing balance laptop computer
Data Colection: measured values only
Reaction 1
(MgO)
Reaction 2
(Mg)
Mass of Sample (Mg or
MgO)
1.49g 0.72g
Volume of HCl used 100mL 100mL
Mass of Styrofoam Cup 7.92g 7.92g
Mass of Cup + HCl 108.30 107.61
Accounting for Energy Loss:
● Real Temperature Change = slope * 0.5 * ^Time
○ Time it took to get to highest temperature
Data procesing:
a. Temperature correction: explanation and calculations
The temperature must be corrected to account for the heat lost because the styrofome cup
was open. In other words, the actual temperatures are actually higher than they appear
because part of the heat is lost in the surroundings.
Magnesium
VIEW DOCUMENT
1015 words - 5 pages
used.Trial 1 Trial 2Mass of stoppered test tube plus metal (grams) 77.8 76.9Mass of test tube and stopper (grams) 47.3 46.8Mass of Calorimeter (grams) 48.1 47.7Mass of Calorimeter and water (grams) 84.6 87.3Mass of Water (grams) 36.5 39.6Mass of Metal (grams) 30.5 30.1Initial temperature of water in calorimeter *C 21.1 20.4Initial temperature of metal (assuming 100*C unless directed to do otherwise) 100 100Equilibrium temperature of metal and water in calorimeter 26 25Change in water temperature 4.9 4.6Change in metal temperature 74 75qH2O 747.59 761.43Specific heat of the metal (Eq. 3) .3312 J/g*C .3373 J/g*CApproximate molar mass of metal 75.5 74.12Unknown No. Unknown.Sample Calculations For
VIEW DOCUMENT
630 words - 3 pages
Experiment: To Verify Boyle’s Law
Materials used: A Boyle’s Law Apparatus, Air Pump, Hand Vacuum
Pump.
Method:
1) Set up apparatus as shown in the diagram.
2) Connect air pump to the in let of the oil reservoir.
3) Open air tap and pump in air until pressure gauge reads its max value.
4) Quickly close tap.
5) Leave for a minute or two, after changing the pressure of the trapped air wait a minute or two before reading the pressure or volume, to allow the air to reach room temperature. This is necessary because when the air is compressed or expanded there may be slight changes in temperature.
6) Then measure the gas pressure by reading it off the Bourdon gauge. Record these volumes.
7) Read
VIEW DOCUMENT
658 words - 3 pages
mixing done by ball milling or attrition milling for a short timeCalcinationDuring the calcination step the solid phase reaction takes place between the constituents giving the electroceramic phase.The calcining temperature influences the density and electromechanical properties of product.The higher the calcining temperature, the higher the homogeneity and density of the final ceramic product.After calcining, the lumps are ground by milling.Compaction (for pellet formation)The desired shape and a minimum green density can be provided by various techniques including powder compaction, slip-casting, and extrusion.The green bodies - minimum density before sintered.The choice of the method depends
VIEW DOCUMENT
582 words - 3 pages
Essay created by Jahseh Onfroy Harristown State High School Class 10B
Introduction
What is climate change? Climate change is the average temperature of Earth has increases since 1950 until now the temperature continuing increasing. Climate change can also refers to climate change that causes an increase in the average of temperature. However climate change are causes by natural events and human that are believed to be contribute to increase in average temperatures.
Causes of Climate Change
Climate change is a serious issue and is not a single issue but a number of environmental issues. Climate change is a rise in the surface temperature of the earth that has changed various life forms
VIEW DOCUMENT
496 words - 2 pages
2 new product concepts
Problem: How can you overcome not being able to get a good night’s rest because it is either too hot or too cold?
Solution: Comfort Plus, a heating and cooling bed technology that allows for a restful night’s sleep.
Brand Positioning: COMFORT PLUS
Target Audience: couples who have trouble sleeping because they get too hot or cold during the night.
Benefit: “Comfort Plus” makes every night’s sleep rejuvenating and energizing making you alert and ready to take on the next day.
Reason Why: Comfort plus technology helps to maintain your bodies individual internal temperature by sending cool or warm air into the bed. Just put in your personal preferences and the machine
VIEW DOCUMENT
386 words - 2 pages
Marisa BustosMrs. RossEnglish 09807/20/2011Global WarmingGlobal warming is the increase of the average temperature of the earth's atmosphere that has become a serious issue in our environment within the last couple years. We should care and pay more attention to all the disasters that are now going on in real life, affecting the world into different areas. But we assume, none the less, that it is not too late: if we do the right things within the next couple of decades, we will be available to stabilize all damages that global warming is causing around the world. High temperatures, climate and sea-level have become a serious problem to the global warming but many people don't believe it's
VIEW DOCUMENT
1039 words - 5 pages
Molar Mass of a Volatile Liquid
Introduction: Given the mass of vapor at conditions of known pressure volume, and temperature, one should be able to determine the molar mass of the vapor. Mathematically, The Ideal Gas Law relates the quantities of pressure (P in atm), volume (V in liters), temperature (T in Kelvin), and quantity of gas (n in moles). Using the expression PV = nRT, where R is the ideal gas constant (0.0821 L atm/mole K), one can determine the quantity of gas under given conditions of pressure, volume, and temperature.
In this experiment, an unknown volatile liquid is heated in a boiling water bath and is vaporized. The vapor forces air from the flask through a tiny pin-hole
VIEW DOCUMENT
1808 words - 8 pages
Factors that Influence Human Comfort
Temperature: Temperature is the measure of how much heat energy is in the air inside a room or building. In a building we usually say temperature to mean the air in the room, but it can be the temperature of the walls or other materials. The temperature of the air varies depending on how much heat energy it contains, and we can add heat energy to the air and raise the temperature using a heat source such as a radiator or an electric fire. The air temperature inside of a building will change depending on the temperature outside the building and the k-values of the materials used to build the walls and insulation. K-values are the values that all materials
VIEW DOCUMENT
320 words - 2 pages
UN Project, FranceGeographyFrance is located in Western Europe, bordering the Bay of Biscay and English Channel. Between Belgium and Spain, Southeast of the UK; bordering the Mediterranean Sea, Between Italy and Spain.Arable Land: 33%The extent of France's coastlines is 3,427 kmThe climate in France varies between each region. The true temperature maritime climate is found in the west near the coasts.The average temperature is 45º F in February, and 61º F in July.France receives approximately 32" of rain each year.The capitol of France is Paris. In January of 2000, Paris had about 10.3 million inhabitants.PopulationJanuary 2000, Metropolitan France had a population of 58.7 million
VIEW DOCUMENT
408 words - 2 pages
Tim CollyerVIRTUAL FIELD TRIP: answer the following questionsat the following web site:http://www.ricoasts.org/discovery/rockyshore/rshome.htm1.Where is Beevertail Rocky Shore?Jamestown, Rhode Island2.aHow do you think Beavertail Point was formed?It was formed by a complex system of faultsb.What type of rocks do we expect to see on our Rock Walk?Shale, phyllite and quartz3.Why do you think it would be difficult to live on the rocky shore?Organisms are constantly dealing with the temperature changes, changing of the tides and the strong ocean waves.4.aWhy do you think there are different plant and animalspecies that live in each zone? (Contains 6 mini-pages)b. Describe the location ofeach of
VIEW DOCUMENT
1770 words - 8 pages
Leah Ladner
Anatomy and Physiology Response Questions
21 September 2017
Erica Kent
Response Question 1
Does temperature affect the rate of diffusion/osmosis?
The rate of diffusion can differ greatly due to the temperature of which something is diffusing from. Diffusion is the process of something being spread or dispersed. The life of cells depends on the dispersion or movement of chemicals throughout the cell. During the process of diffusion, substances move from a level of high concentration to levels of lower concentrations. Nutrients will enter the cells which will push out the materials that are not needed for the cell to live. The particles will transport from outside of the cell to
VIEW DOCUMENT
526 words - 3 pages
concentration of Nitrogen that would be a stress. The system will have to respond in order to undo the stress of increased Hydrogen. The forward process uses up Hydrogen and Nitrogen while the reverse process increases the presence of Nitrogen and Hydrogen.The industrial conditions for producing ammonia the temperature must be 450ºC to 500ºC. The forward reaction is exothermic. If we remove heat as a product will result in the equilibrium mixture making richer ammonia. Since we want ammonia from the Haber process, the reaction conducted at 450ºC. Because all reactions go faster if the temperature is raised. Reversible reactions, such as the Haber process, rasing the temperature will make
VIEW DOCUMENT
541 words - 3 pages
Professor Andreacchi
Writing 3
2 May 2018
Global Warming – Myth or Reality and Its Consequences?
We usually hear about global warming on the television. What is global warming? Global warming is a term which uses by scientist to indicate the average temperature of the Earth has increased since the 1950s until now. In another word, global warming is also referring to climate change due to the increase in the average of temperature. Therefore, global warming has been a subject of political controversy. However, nowadays with the scientific knowledge has grown, the scientists doubt that global warming is the reality and its consequence if the climate change.
The climate on the Earths has
VIEW DOCUMENT
500 words - 2 pages
catalyst. A catalyst is something that changes the rate of reaction without being used up and is reformed at the end of the reaction. ◾Enzymes do this by destabilising bonds in a substrate molecule, lowering the activation energy and therefore allowing the reaction to occur more quickly.
How temperature, pH, substrate and enzyme concentration affect the rate of enzyme activity:
Temperature & Enzyme Activity
As temperature increases so does kinetic energy
Reactants now move faster increasing the frequency of collisions between substrates and enzymes
This increases the rate of reaction
However, if the temperature is increased too much, bonds in the enzymes active site will break, causing the
VIEW DOCUMENT
817 words - 4 pages
of a 1M solution, at 1 atm and 25 oC.Heats of formation are usually negative quantities.Heat is a way of transferring energy between a system and its surroundings that often, but not always, changes the temperature of the system. Heat is not conserved, it can be either created or destroyed. In the metric system, heat is measured in units of calories, which are defined as the amount of heat required to raise the temperature of one gram of water from 14.5oC to 15.5oC.In the SI system, the unit of heat is the joule.Heat CapacityThe heat capacity of a substance is the amount of heat required to raise the temperature of a defined amount of pure substances by one degree (Celsius or Kelvin). The
VIEW DOCUMENT
1237 words - 5 pages
Essay: written by student Charlotte
Discuss ways in which farmers may control the environment of crop plants and animals to increase productivity/maximise crop yields
To capitalise on the productivity of plants and animals in an agricultural environment there are several steps which a farmer can take to improve growing conditions and therefore yield. By providing optimum conditions for growth factors such as temperature and nutrient supply and limiting potential competition, the productivity of the land can be dramatically improved.
Initially, the physical condition of the soil can be modified to improve growth of crop plants. By maintaining a neutral soil pH, farmers can ensure that
VIEW DOCUMENT
465 words - 2 pages
Jet streams are relatively narrow corridors or very strong winds within the atmosphere. The most prominent jet stream is located directly above the polar front in the upper troposphere between the mid-latitude and the polar troposphere. Because of its close association with the polar front this jet stream is known as the polar front jet stream (Williams).The polar jet stream is not well defined around the globe. However where surface temperature gradients are steep, where the polar front is well defined, jet stream winds are stronger. These segments of strong winds are known as jet streak. The strongest jet streaks develop along the east cost of America. The jet streaks are most predominate
VIEW DOCUMENT
444 words - 2 pages
CHECKING FOR UNDERSTANDING MOD 2 00102-15_PPT3
Instructions: Review the Powerpoint Presentation and answers 25 mixed math questions and submit on the HUB before the end of the class. (Recheck all answers before submitting)
1. Ice cubes freezes at what temperature? 32 degrees
2. A 2-liter bottle of soda equals to what in gallons? 0.52 gallons
3. What unit of measure is ignored?
4. 1-foot equals to what in inches? 12 in
5. 1-meter equals to what in centimeters? 100 cm
6. 0.45-meter equals to what in centimeters? 45 cm
7. 36 feet equals to what in yards? 12 yards
8. 1 metric ton equals to what in kilogram? 1000 kg
9. 50 pounds equals to what in kilograms? 22.67 kg
10. Define the term Volume
VIEW DOCUMENT
3683 words - 15 pages
sheet for Part IIB
Pre-laboratory Assignment
Write the following in your laboratory notebook immediately after the short summary of the
experiment. You will tear out the perforated pages and turn them in at the beginning of the lab.
Read Appendix D – Using a Coffee-Cup Calorimeter posted on myCourses along with this
handout. This will help you understand the meaning of system and surroundings needed to
answer the questions below.
1. In Part I of this lab, you will be dissolving various salts (ionic compounds) in water. A
temperature change may or may not be observed; a temperature change indicates that heat is
produced or absorbed by the system and flows to or from the surroundings during
VIEW DOCUMENT
1330 words - 6 pages
constantly seen as loveable and cute. Little do we know, that Panda Bears could soon be facing a serious problem, they could eventually be in a battle against mother nature.
Research has come to show that the Pandas are threatened with a climate change that will ultimately affect their everyday lives. A life where the primary food source is bamboo, where habitat range is narrow, and where reproductive rates are low, is one that can be hard to maintain. To help maintain this life, there are factors that are considered when determining the suitability of the environment, such as, elevation, temperature, latitude, longitude, slope and vegetation (Gong et al, 2016, pg. 598). These factors are all
VIEW DOCUMENT
3760 words - 16 pages
(B) + 6H2O (L)The main factors that affect photosynthesis are:The amount of Carbon dioxideThe temperature of the environmentThe amount of light availableAvailability of waterGreen plants obtain their raw materials for the above reaction from the following resources.Carbon dioxide from the air which has 0.4% concentrationLight from the sun (solar energy)Temperature depending on the environmentWater that is absorbed from the soil via the roots for land plants. Aquatic plants from their habitat where they liveThe rate of photosynthesis will depend on all of the above factors. Photosynthesis is a chemical reaction, and enzymes act as catalysts to speed up the reaction. Enzymes work best at an
VIEW DOCUMENT
594 words - 3 pages
In a medium bowl, whisk together the butter and granulated sugar until well combined. Whisk in the vanilla and chocolate. Add the egg and whisk until thoroughly incorporated.
In another medium bowl, stir together the flour, cocoa powder, salt, and baking soda until well mixed. Using a wooden spoon, stir the flour mixture into the chocolate mixture. The dough will start to seem too floury, and you will find it easiest to switch to mixing it with your hands until it comes together. It will have the consistency of Play-Doh. Let the dough sit at room temperature for about 1 hour to firm up.
Transfer the dough to a 15-inch square sheet of parchment or waxed paper. Using your hands, shape the
VIEW DOCUMENT
573 words - 3 pages
2
Man-Made Global Warming vs Natural Climate Change
In the last few years, there has been an international debate over man-made global warming and natural climate change. Global warming is the steady increase in temperature of the Earth’s atmosphere. Therefore, it takes a long time for this process to happen. Climate change is the change in the regional or global weather conditions. Climate change is happening, and many believe that mankind is the cause of the changes.
Global warming has been an issue for decades, which is rapidly increasing every day. According to the American Meteorological Society, “It is clear from extensive scientific evidence that the dominant cause of the rapid
VIEW DOCUMENT
559 words - 3 pages
time
2. Amount of toothpaste
3. Size of pit
4. Temperature of incubator
5. Media
Methodology
Materials and Apparatus
Materials
Apparatus
· 1x 25 ml Colgate tube
· 1x 25 ml Pepsodent
· 1x 25 ml Sensodyne
· 1x 25 ml Elmex
· 1x 25 ml Aquafresh
· 1x 10 ml Nutrient broth solution
· 1x 500ml Distilled water
· 1x 9.2g Agar powder
·
· 1x Incubator (keep constant temperature)
· 5x Sterile cotton swabs
· 1x conical flasks
· 5x sterile petri dish
· 1x Inoculate loop
· 1x Bunsen burner
· 1x Gauze
· 1x Tripod
· Adhesive tape
· 1x Marker
· Autoclave
· 1x Stirring rod
Method
1. Sterilize all petri dishes, conical flask, thermometer and stirring rod in an autoclave or by placing them in a bath of boiling
VIEW DOCUMENT
494 words - 2 pages
recording the temperature every 30 seconds or looking at the stopwatch. By changing our shifts every 5 minutes, this will make us to have a fair chance of working. We than turned of the fire once the solid melted.Time Temp0:30 211 221:30 222 222:30 233 243:30 254 274:30 295 315:30 336 356:30 377 397:30 448 498:30 519 539:30 5410 5710:30 5911 6311:30 6912 8012:30 86Discussion and ConclusionI think the unknown substance is naphthalene, for it has the highest melting point, matching the data we collected. I think we have been doing well on it, without doing anything things wrong. Also we should have turned the fire down a little bit, for the temperature suddenly rised from 80 to 86 degrees.Modifications to Original Plan:I got an idea of doing it in turns during the setup for the investigation. Since Sam agrees in my idea, we changed our way of working.Evaluation:Our method used here was fine, if we have turned the fire smaller, there, it may be slow, but the information is more accurate.
VIEW DOCUMENT
714 words - 3 pages
the fume hood.
Procedure
1. Assemble the equipment as directed by the instructor.
2. Add 100.0 mL of tap water to the beaker. Record the volume and initial temperature of the water.
3. Determine the mass of the water using the Absolute Density of Water table on my webpage.
4. Using the graduated cylinder, fill a 2-L plastic soda bottle to the very top with tap water. Record the total volume of the bottle. This will be the volume of methane gas collected by downward displacement of water.
5. Carefully invert the full 2-L bottle into a pneumatic trough filled with water. Do not allow any air into the bottle. Make sure the overflow of the trough is directed into the sink at your laboratory
VIEW DOCUMENT
1230 words - 5 pages
climate trends include: global warming, global coolingPast climate behavior, being studied in determining normal variation as well as recent climate: historical temperature record, temperature record of the past 1000 years, satellite temperature recordCauses of recent climate trends: attribution of recent climate changeSupporters' positionSupporters of the global warming theory assert that:the IPCC reports correctly summarise the state of climate sciencethe historical temperature record shows a rise of 0.4-0.8 °C over the last 100 yearsthis rise is unprecedented in the temperature record of the past 1000 yearsclimate models can reproduce this trend, but only when using greenhouse gas
VIEW DOCUMENT
3163 words - 13 pages
sunlight, or hearing a sharp, painful noise. All of these examples deal with multiple receptors of the body receiving input in receptive fields. A receptive field is an area where a receptor is sensitive to a stimulus (Ramachandran 1993). A sensation is the response that a subject would feel from the stimulus. A prolonged sensation can cause an adaptation in the body, such as the skin for changes in temperature (Benzinger 1959). Adaptation is a mechanism of the body to stop responding to a prolonged stimulus (Meyer et al. 2001).Looking at the skin specifically, many receptors join to regulate the homeostasis of the body. Receptors for different degrees of pressure are throughout the skin. These
VIEW DOCUMENT
1940 words - 8 pages
Agriculture Assessment – Elective Research Study - Zach Taylor – Term 2, 2018
Part A
Question 1 - State a conclusion and a recommendation from this research
Conclusion
Temperature effects plant growth and development depending on the type of plant or species. The exposure of temperature extremes exhibits s larger impact on grain yield then on vegetative growth because of the increased minimum temperatures. If plants are exposed to extreme temperatures at the onset of the reproductive stage this has a major impact on the fruit and grain’s production Observations were made that show maize grain yield is greatly reduced by above normal temperatures during the grain filling period
VIEW DOCUMENT
1025 words - 5 pages
Our world is the beginning and the end. Before humankind our Earth was healthy and its inhabitants did not have to worry about the ozone layer or Earth's temperature increasing. Now, along with our many everyday stresses, we have worries about our world heating up; also known as global warming.The sun and the cycle of the "greenhouse effect" is what keeps all of humankind living. The sun aides the weather, climate, and surface temperature of the Earth. Once our Earth receives this energy it radiates it back into space. The "greenhouse effect" is what helps to make our Earth's temperature comfortable and not too low, basically, it is what keeps our world alive and functioning (Global Warming
VIEW DOCUMENT
1125 words - 5 pages
Aim:To test which condition (external or internal) best suits the growth of seed germinationHypothesis:I would assume that the seeds that were placed outside in their natural environment would have a better growth pattern than that of the internally grown one due to the fact that its exposure to nature's day/night length, natural sunlight rain and temperature are the necessary elements for successful seed germination.Apparatus:4 Containers (preferably 0mm x 200mm x 100mm)Small bag of potting mixPacket of pea seedsRuler for measuring seed growthWatering canMethod:(1) Pour potting mix into two exact size containers (filling ¾ of the container)(2) Place four seeds (25mm deep) in each
VIEW DOCUMENT
673 words - 3 pages
Title:
Paper on Water Cup Inversion Experiment
Submitted By: Theodore Xavier Pueda
Submitted to: Mr. Roach
Title: Paper on Water Cup Inversion Experiment
Testable Question: Does the volume of water affect the time for paper to drop from cup?
Hypothesis: As the volume of water increases, the time for the paper to fall off the cup stays the same.
Experimental Design: Different volumes of room temperature water will be poured 9 similar cups, starting with 10 mL and increasing by 10 mL each time. A piece of paper will be placed on top of the cup and the cup will be inverted.
Independent Variable: Volume of Water (mL)
Dependent Variable: Volume of cup (mL)
Rim diameter of cup (cm)
Temperature
VIEW DOCUMENT
707 words - 3 pages
heating or air conditioning in the slaughterhouse. This made the slaughterhouse an even more excruciating working environment. “One bitter morning in February the little boy who worked at the lard-machine with Stanislovas came about an hour late, and screaming with pain. They unwrapped him, and a man vigorously rubbing his ears; and as they were frozen stiff, it took only two or three rubs to break them short off” (85). This quote describes the winter time in Chicago, and how the working conditions were almost unbearable for the workers. The temperature gave the workers even more ways to injure themselves. Often times men would suffer frostbite. The temperature was so cold in the
VIEW DOCUMENT
584 words - 3 pages
could have affected the
stream in any way.
2. Then we took water temperature, average width and average depth. Using the
thermometer/tape measurer both 3 times and getting the average. Using the measurng
tape in 3 different places. We also took the average velocity of the river.
3. Then we took the chemical measurmentsof the river. pH, dissolved oxygen, tempterature,
number of nitrates, phosphates and turbidity.
4. We then took samples of leaves and biomass in the river to find macroinvertebrates. We
would find these creatures and organize them in ice trays. Then we would classify them
in 1 of the 3 groups that determined how resistant to pollution they were.
Data Tables/ Charts:
Test 1 Test 2
VIEW DOCUMENT
