Daphnia Experiment Report 1. Introduction Caffeine is found in many plant species‚ where it acts as a natural pesticide. It is found most commonly in cocoa‚ tea and coffee‚ but is also artificially added to some soft drinks such as cola to act as a flavour enhancer. When consumed by humans‚ caffeine works as a stimulant causing amounts of released neurotransmitters to be increased. High use of caffeine has been related with raised blood pressure‚ restlessness‚ insomnia and anxiety which‚ in
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equator. (iii) Acceleration due to gravity decreases as we move inside the earth‚ such as deep mines. (iv) Acceleration due to gravity decreases as we move away from the surface of the earth‚ such as on the mountains‚ in aeroplanes‚ in spaceships‚ etc. 9. Mass : The amount of matter contained in a body is called mass. It is a scalar quantity and is measured by a physical balance. It is always a constant quantity and its unit in SI system is kilogram. 10. Weight : The force with which a body is attracted
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antisocial behavior. The experiment was undertaken with pastoralists from southern Namibia and the study area is divided into two parts according to the exogenous differences in biomass production (a high yield and a low yield area). In this paper‚ biomass production is taken as a proxy of resource scarcity and moved the lab to the field to observe fundamental human behaviors‚ such as risk aversion‚ time preference‚ trust‚ spite‚ and cooperation. There were two experiments‚ such as‚ a one-shot public
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Jacob Stewart Dr. Wells English 101 20 September 2013 In the 1950’s‚ a series of experiments were performed by psychologist Solomon Asch on the effects peer pressure can have on someone that would otherwise be stalwart in their judgment. In the experiment‚ a group of young men were shown a line with three other lines of various lengths next to it‚ and asked to determine which of three lines matched the length of the first line. There was‚ however‚ a catch: all but one of the men were
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Introduction: The marshmallow experiment is one of the best-known studies in psychology that was conducted in the late 1960’s by an Australian-born clinical psychologist Walter Mischel at Stanford University. Back then‚ the study tested over 600 nursery kids and this experiment has been existing and continuously conducted by researchers until now. The instruction was that the children could eat one marshmallow immediately or if they could wait they would receive two marshmallows later. The purpose
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Change in Precipitation Ramon Pena BIO101 February 14‚ 2011 Dr. Richard Steiner Change in Precipitation Introduction This experiment will take course during a 300-year-time -period simulation. This experiment will consist of two islands‚ Darwin Island‚ Wallace Island and take only into account the bird population of these two islands. The parameter will stay the same‚ except for one variable; precipitation. I will record how the precipitation changes the beak size of the bird population
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Many people drink sugary drinks every day‚ but really how bad is it for your teeth? This project shows the repercussions of drinking sugary soft drinks. This experiment tests eight adult teeth in eight different soft drinks for 48 hours. The results are equivalent to not brushing your teeth for two days or constantly sipping on a soft drink for more than an hour. If the sugar and acid particles are left on the teeth‚ then more acid is made by the sugar and the enamel starts to wear away. This can
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The Rocky Shore Experiment Research Question: How does type of substrate affect the variation of species and vegetation as you move away from the seashore at a Rocky Shore? Hypothesis: As we get further away from the seashore‚ there would be a decrease in the number of species and vegetation found. Also‚ the type of substrate will have a major affect on the biodiversity. Background Information: A rocky shore is an intertidal area of seacoasts where solid rock predominates. Rocky shores are
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Results - Chemical added to indicator Color Estimated pH Acid or Base Test Tube A (Soft Drink): Light pink 3-6 Acid Test Tube B (lemon juice): Pinkish Red 2-4 Acid Test Tube C (Antacid Tablet): Light purple 6-5 Acid Test Tube D (ammonia solution): Green 9-11 Base Test Tube E (Sodium Carbonate Solution): Dark Green 8-10 Base Test Tube F (Sugar Solution): Purple 7 Neutral Our results showed the clear color change as pH increased‚ transitioning from pink to purple to green to yellow. This develops a basic
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Spirit Burner Experiment Aim: To perform an experiment in the labs to determine the heats of combustion of selected alcohols and then to use this information and the gathered data from chemical data sources to determine trends in the longer chain alcohols. The Variables that MUST be controlled throughout the experiment are: • The height from spirit burner nozzle to the base of the water filled beaker • Air drafts around the room must be kept to minimum so as to keep the heat on the base of the
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