In this lab‚ we extracted spinach pigments‚ and analyzed what colors of light these pigments absorb. By using TLC plate‚ hexane and acetone‚ I separated the pigments of spinach‚ and discovered that the main pigments were green and yellow. This works because with different polarities‚ pigments move at different rates. Hexane and acetone were also used to separate chlorophyll and carotene from spinach. Since they are polar‚ they can separate organic and inorganic things. From the experiment‚ I know
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Projectiles Practical Report 1. Introduction Velocity is a vector measurement of the rate and direction of motion or‚ in other terms‚ the rate and direction of the change in the position of an object. [1] Velocity can be found many ways through various suvat Equations and their rearranged forms. For example v2=u2+2as in which the square of the final velocity can be found if you know the objects initial velocity‚ the acceleration and the distance travelled. Using such formulae makes it possible
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Abby Goldschmidt Honors Biology 2° Mrs. Gempel September 3‚ 2015 Daphnia Lab Results Paper Abstract The goal of the study was to observe the effects of multiple chemicals on a Daphnia magna’s heart-rate compared to a control (pond water). The different chemicals were caffeine and alcohol. The heart-rate was the main variable in this experiment. The Daphnia’s heart-rate was observed for 15 seconds and then multiplied by 4 to show its heart-rate in one minute. This was repeated 4 times for each
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1 Book: 1 Newton 2 Books: 2 Newtons 3 Books: 3 Newtons The force was different because there was more mass to pull as more books were added. This shows newtons 1st law because the books wanted to stay at rest‚ but as more force was added they moved. The 2nd law is seen because the more mass there was‚ the more force was required to accelerate the books. The 3rd law is there because as you pull on the spring balance‚ it pushes pulls back on you‚ which lets it move. The eggs connect to the first
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energy is the energy of motion. A ball has kinetic energy when it flies through the air. The ball has the ability to do work in that it can act upon other objects with when it collides. Potential energy is stored energy that objects have because of their position. A cup on a table has potential energy: If you knock the cup off the table‚ gravity will accelerate the cup‚ and its potential energy will convert to kinetic energy. Kinetic energy is the energy of mass in motion. The kinetic energy of an
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Genetically Modified Organisms INTRODUCTION: The purpose of this lab was to identify if non-labeled food products are actually genetically modified foods. Before we could begin testing this theory we first had to gain an understanding about genetically modified organisms in general. This was rather easy because if you have been to any grocery store lately you have without a doubt seen products with labels saying "GMO-free" or even "contains only non-GMO ingredients." GMO actually stands for
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A. Avril Crayfish Lab Report November 9‚ 2012 Dr. Marvin Results: Figure 1. Firing Rate of Tonic Receptor in Response to Stretch. The correlation between Firing Rate and Stretch of the slow adapting crayfish receptor for four different sets of data is represented in this figure. The recordings are taken at stretches of 2‚ 4‚ 6‚ 8‚ and 10 mm of the crayfish tail. The best fit lines for the different sets of data are as follows: Ali and Emily- Linear best fit line‚ Dave and Laura- Exponential
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Succession Lab INTRODUCTION: The purpose of our lab was to begin to understand the rates of succession. Succession is a number of persons or things following one another in order or sequence. Considering that all living things follow some sort of order‚ Joey Collins‚ Brian Carman‚ Chris Broadwater‚ Marisa Grondin‚ and I attempted to figure the succession rates of two different forests. In order to do this we used the forest behind the elementary school and the forest behind the track‚ by the
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Sterling Hayden AP Biology Mrs. Proehl 24 November 2014 I. Title Effect of Differing pH‚ Temperature‚ and Enzyme Concentration on Catalase Reaction Rate II. Introduction Enzymes are used to increase the rate of specific reactions in the body. Catalase‚ a specific enzyme‚ speeds the breakdown of hydrogen peroxide‚ a toxic chemical produced by cells in the body‚ into water and oxygen (Cain and others‚ 2010). The oxygen can be observed as bubbles coming from the reaction site. Catalase is found in many living tissues of organisms
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Purpose The purpose of this experiment was to become familiar with the electrocardiograph to help us determine the electrical activity of the heart. As well as‚ to observe how exercise and different body positions(conditions) can affect the activity of the heart. Introduction Trained professionals can look at the EKG tracing and determine if the heart is normal or if the heart is abnormal. “An ECG records the electrical activity of the heart. The heart produces tiny electrical impulses which spread
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