portentosa Ectotherms in Changing Temperatures Abstract Temperature and environment plays a key role on the effects of an ectothermic organism’s metabolism. The specific ectothermic organism used in this study was the Gromphadorhina portentosa also known as the Madagascar Hissing Cockroach. In this study we measured CO2 production (%) and temperature (̊C) every three minutes for a total of 15 minutes in three different temperature environments. The three temperature environments conducted in the experiment
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How does temperature affect the fermentation of yeast? In science‚ we stretched a balloon over the top of a bottle filled with sugar‚ warm water‚ and dry yeast. It inflated a little after a few minutes. We did the same thing with another bottle filled with sugar‚ cold water and dry yeast. The balloon didn ’t inflate. Apparently fermentation occurs more in hot temperatures than in cold. Why is this? Chemical reactions within yeast are facilitated by enzymes‚ which are large organic catalysts. Each
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the rate of biochemical reaction by speeds up the breakdown of hydrogen peroxide into water and oxygen gas. The students have formed a hypothesis toward this experiment. If the speed of decomposition of hydrogen peroxide is related to the temperature then in high temperature it will speeds the decomposition of hydrogen peroxide. Materials ● Catalase ● Hydrogen peroxide 3% and 1% ● Forceps ● Filter paper discs ● Water ● Ice ● Water baths ● Vials ● Marking Pencils ● Stopwatch Procedure
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reagents will begin at 45 mL‚ and the other at 5 mL. The former will decrease in increments of 5 mL while the latter increases in increments of 5 mL. The independent variable is the varying measurements of reactant‚ while the dependent variable is the temperature change as result of the reaction taking place. It is crucial that the molarity of the acid and base remain constant. Materials & Procedure Materials
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thermometers are used for measuring human body temperature‚ with the tip of the thermometer being inserted either into the mouth under the tongue (oral or sub-lingual temperature)‚ under the armpit (axillary temperature)‚ or into the rectum via the anus (rectal temperature). CLASSIFICATION BY TECHNOLOGY Liquid-filled The traditional thermometer is a glass tube with a bulb at one end containing a liquid which expands in a uniform manner with temperature. The tube itself is narrow (capillary) and has
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1 Equipment and Materials PASPORT Xplorer GLX Fast-Response Temperature Probe (included with GLX) Basic Calorimetry Set (1 calorimeter cup) Balance Water‚ about 15 degrees warmer than room temperature Ice‚ crushed Towel Part Number PS-2002 PS-2135 TD-8557 SE-8723 Purpose The purpose of this activity is to determine the amount of thermal energy needed to change a specific quantity of ice (one gram) into water at a specific temperature (0º C). This amount of thermal energy is called the Latent Heat
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THE SWORD Effects of Temperature on Amylase Activity ABSTRACT: The aim of this EEI was to test the effects of temperature on the activity of the enzyme Amylase. Solutions of starch and amylase were held at selected temperatures by various methods of temperature control. Once the solutions reached and maintained the desired temperature they were combined. Samples at timed intervals were then taken and reacted with a reagent to determine the effect the selected temperatures had on the reaction
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Exercise 1 Binary Solid-Liquid Diagram CHEM 112.1 – 2L Group 2 I. Data and Results Table 1.1 Break and arrest temperature of diphenylamine-naphthalene mixture. Table 1.1. Mole fraction of naphthalene‚ χB‚ and corresponding arrest and break temperature at each run. Run number | Mole Fraction‚XB | Ave. break temperature‚ ˚C | Ave. arrest temperature‚ ˚C | 1 | 1 | 72 | 35.4375 | 2 | 0.868388 | 72 | 35.4375 | 3 | 0.725218 | 62 | 35.4375 | 4 | 0.568895 | 49 | 35.4375 |
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metal -100 grams sample mass (mmetal) Temperature of boiling water and metal sample in the pot (Ti(metal)) 365k and 345k Temperature of cool water in the calorimeter prior to adding hot metal sample (Ti(water)) 364k Maximum Temperature of water/metal in calorimeter after mixing (Tf) 365k LEAD METAL Pre-weighed Lead metal sample mass (mmetal) 50g Temperature of boiling water and metal sample in the pot (Ti(metal)) 365k & 340k Temperature of cool water in the calorimeter prior
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and a laboratory self-designed cool box. General background of Peltier device: Peltier devices are solid-state devices used for cooling and heating. They occupy a niche market due to their small size‚ cost effective manafacture and accurate temperature control. Peltier works bt utilising the difference in the conduction band energies of two materials. When electron migrate across a junction of two unlike materials they may either absorb or liberate heat energy. Experimental Methods and set-up
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