Salt from green beans Name: Ashni Couprie and Dennise Susanto Class: 5c Introduction From previous experiments we ’ve learned that salt is extracted from green beans. To be more specific: salt is extracted from when the beans are cooked in water in which salt has been dissolved. This experiment is based upon the osmoses theory. According to this theory the cell walls of the green beans are what we call a semi permeable membrane. This membrane only lets water through and not the substance
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it I jump to getting angry very fast. You can only change yourself on the way that you react‚ you cannot change the way people do things. By modifying your behavior will help you adapt to things that are around you‚ this experiment is to do something similar. In this experiment you will be applying a positive and
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I CHEM XXI Project Report Worksheet (4 pages max.) Experiment title: How Do We Identify an Unknown Substance? Guiding questions: State the question or questions that that you were trying to answer in this lab. How do you determine the two unknown types of plastic? What are the two unknown plastics? Safety considerations: Briefly describe the safety measures you had to take to perform the experiments. Before entering the lab‚ I put on my lab coat and practiced
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Introduction In this experiment I aim to find out if caffeine has an effect on the heart rate of daphnia. Daphnia are water fleas that have a sort of heart that we can see in magnification. We can count the number of heart beats in a minute of a regular daphnia and try and get a new one with the same specifications as the old one that may have died. It is also a good idea to get a new one as we want to see how much it affects it from ordinary instead of adding the caffeine one after another
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brand of glue * The type of surface Dependent Variable: * The strength of the glue Controlled Variables: * Same amount of glue (one swipe) * Same amount of time to dry * Same person conducting experiment * Same time of day * Same amount of experiments * Same Net Weight (21g) * Same brand of surfaces * Same person timing (Jet) * Same time and place of investigation * Same length of surface Plan Aim: To see which brands of glues stick the
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in the colonies. Slowly‚ England rose to compete in this struggle for colonies‚ settling North America. Although New England and the Chesapeake regions were both settled by Englishmen‚ these two colonies evolved into completely different colonies as a result of their many differences of opinion starting with their reasons for settling the land‚ spreading to create two completely different societies. From the time each ship set off from England‚ both the New England and Chesapeake colonies were bound
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so deeply ingrained and powerful that it cancels out a person’s ability to behave morally‚ ethically‚ or even sympathetically. In 1963 Milgram carried out an experiment. He hypothesized that individuals who would never intentionally cause someone physical harm would do so if ordered by a powerful authority figure. To carry out the experiment‚ Milgram designed a shock generator- a large electronic device with 30 switches labeled with voltage levels from 30 volts increasing at 15-volt intervals to
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Stanley Milgram: ’electric shock’ experiments (1963) - also showed the power of the situation in influencing behaviour. 65% of people could be easily induced into giving a stranger an electric shock of 450V (enough to kill someone). 100% of people could be influenced into giving a 275V shock. The Milgram Experiment Stanley Milgram (1963) Experiment: Focusing on the conflict between obedience to authority and personal conscience. Investigate: Whether Germans were particularly obedient to authority
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This part of the experiment yielded an exothermic reaction. The purpose was to calculate the specific heat capacity and molar mass of the zinc metal. The specific heat capacity was found to be 0.197 J/g °C with a percent error of -49.5%. The molar mass was found to be 127 g/mol with a percent error of 94.2%. Possible sources of error inherent to this segment of the experiment were the fact that when the temperature of the solution was being measured
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Design Experiment: Enzyme Inhibitors. Research question: What is the effect of adding lead nitrate solution on the activity of amylase enzyme? Aim: To test the effect of adding nitrate solution on the activity of amylase. Background Information: Inhibitors are molecules which repress or prevent another molecule from engaging in a reaction. They are substances that attach themselves onto an enzyme and reduce or prevent the enzyme’s ability to catalyse reactions. Competitive Inhibitors are inhibitors
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