After performing this experiment‚ it was found that the surface the chocolate was placed on could make a major difference. The hypothesis that was made had mostly incorrect predictions‚ but with some correct ones. It was found that using the palm of one’s hand was the best surface on which to melt chocolate‚ as was predicted. It melted so far‚ and so fast‚ that the experiment had to be altered. Coming in second place was the surface of black paper‚ something that was not expected. The black
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diagram above.) 2.Secondly I will measure the required amount of Zinc (Zn) on a weighing scale‚ again for precise accuracy. I will then measure the starting temperature using a thermometer. Next I will pour the Zinc into the test tube containing CuSO4. 3.Finally I will measure the final temperature using a thermometer and record the temperature rise in °c. (I will carry out all my experiments under lab safety precautions.) Variables *I will vary the mass of Zinc‚ & use the following Zinc weights:
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BI309 Lab-2 Name of student: Anisa Dreunibakarua ID #: S11033198 Title: Effect of Temperature and Stimuli on Simple Muscle Twitch. Introduction: Skeletal muscle is a type of striated muscle that is attached to skeleton to facilitate movement by applying force to bones and joints through contraction. Skeletal muscle generally contract voluntarily when stimulated by the nerve‚ although they can also contract involuntarily at times. Muscle action is controlled by the Nervous System
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Effects of Temperature‚ pH‚ Enzyme Concentration‚ and Substrate Concentration on Enzymatic Activity INTRODUCTION Enzymes‚ proteins that act as catalysts‚ are the most important type of protein[1]. Catalysts speed up chemical reactions and can go without being used up or changed [3] Without enzymes‚ the biochemical reactions that take place will react too slowly to keep up with the metabolic needs and the life functions of organisms. Catecholase is a reaction between oxygen and catechol
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The earth doesn’t have an even balance of heat and the reason for this is because the earth is a geoid ‚ the sun’s rays hit directly on the equator(caused by unequal insolation due to three factors: angle of strike‚ atmospheric depletion and surface area.) and then move outwards towards the polar areas. The atmosphere together with the ocean currents work hard to try and even out the imbalance of heat energy by redistributing the air from the equator to the Polar Regions but also from the Earth’s
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Introduction: The process of respiration happens in many organisms and species. For the lab study that we are going to conduct I choose Yeast as my organism. First off Yeast is a microscopic fungus consisting of single oval cells that reproduce by budding or fission (is the splitting of an atom)‚ and capable of converting sugar into alcohol and carbon dioxide. When making your own bread‚ you can buy yeast in the grocery store. The yeast contains little brown grains that will carry out cellular respiration
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Introduction: It is often taught that if we drop two objects of varying masses simultaneously under the same conditions‚ they will reach the ground at the same time. However‚ this is rarely seen in the natural world. This discrepancy is attributed to a frictional force called drag. In a previous experiment‚ multiple variables thought to affect drag were tested. Previously tested variables were weight and surface area. It was found that weight had an inverse exponential effect on time it took the
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Graph 4 shows a positive correlation between volume of oxygen and the increase of hydrogen peroxide; as the amount of substrate increases‚ the more oxygen is produced from the enzymatic reaction of hydrogen peroxide. For example‚ when five drops of hydrogen peroxide was added‚ it can be seen that 16.2mL of oxygen collected in the gas syringe‚ whilst when 15 drops were added‚ 96.4mL of oxygen was indicated‚ strongly supporting the original hypothesis‚ which was that as more hydrogen peroxide was added
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various surfaces‚ how might temperatures differ between urban and rural areas? Which setting tends to be warmer on a given day and why? Also‚ are there any factors other than albedo that might affect the temperature differences between the two settings? On any given day the urban areas are hotter than that of the rural areas. Urban areas tend to be warmer than surrounding rural areas due to urban heat islands Albedo is a major factor in increase of the urban temperature. Albedo is “the fraction
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Title: Diffusion Rate of Methylene Blue on Agar Plates at Different Temperatures Abstract: Diffusion is the movement of particles from an area of high concentration to an area of low concentration wherein substances are independent‚ rapid and in random motion which frequently collide with each other in the sides of the container. This study aimed to assess the influence of temperature on the diffusion rate of methylene blue on agar plates. To determine the relationship between the two variables
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