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  • Drop In The Chips Into The Acid
    1,254 words
    Investigating the Rate of Reaction Between Marble Chips And HCL Safety- must always wear safety glasses and we should be very careful not to drop any acid. Fair test- we must make sure that we use the same size, amount and roughly the same mass of chips, this is because we want to keep the chips roughly the same all the way through the experiment so that it will be a fair test and the results we be in relation to each other, otherwise the results will be completely different to what we will expe...
  • Evidence Table Of Results Concentration Of Acid
    531 words
    Rates of Reaction: Marble Chips and Hydrochloric Acid Rates of Reaction PLANNING AIM To find if changing the concentration of an acid will increase or decrease the rate of the reaction when marble is dissolved in hydrochloric acid. PREDICTION When the concentration of acid increases, more gas will be given off faster. I know this from my trial experiments. METHOD Since I will be working with strong acid, I will wear safety goggles while conducting the experiment. I will use Marble chips all of a...
  • Hydrogen Peroxide In The Experiment
    2,153 words
    I have to plan and carry out an experiment to investigate the way in which concentration of a substrate affects the rate of an enzyme-catalysed reaction. I will need to carry out some background information to find out what may affect my experiment. Background Information: An enzyme is a biological catalyst. They speed up the rate of a reaction however they are not affected themselves whilst doing this, this is why they are catalysts. Enzymes are made to be specific, this means that they can hav...
  • Medical Experiments Hold Some Valid Scientific Data
    2,592 words
    The Validity of Nazi Hypothermia Experimentations: The Question of Ethics Versus Scientific Knowledge. This essay deals with medical experiments conducted by the Nazis during the Second World War. Many types of experimentation occurred in the Third Reich, they include euthanasia, hypothermia, high pressure, and genetics. However, most of the experiments carried out in Nazi Germany are viewed as little else than another method of torture imposed upon involuntary subjects. The question can be pose...
  • Light Intensity The Rate Of Photosynthesis
    2,155 words
    Biology Coursework! V Does The Light Intensity Affect the Rate of Photosynthesis The Investigation In this experiment I will investigate the affect in which the light intensity will have on a plants photosynthesis process. This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable. Variables The input variable which will be used in this investigation will be the light intensity (this will be a 100 Watt bulb being moved closer and further away from the...
  • Increased Concentration
    1,192 words
    . Experiment for Chemistry Coursework For this investigation I am looking at how the concentration of acid can change the reaction and how I can explain this using collision theory. My Prediction: I predict that the greater amount of concentration the faster the reaction will take place. Therefore, particles in the two compounds will collide faster. Due to my prediction if it is correct, I expect to see the cross on the paper disappear faster. As I already know that increasing one quantity will ...
  • Electrons In The Wire
    509 words
    Introduction Electric charge on an object is often called static electricity. Objects charge up because they gain or lose electrons. The electron is the smallest part of the atom. The electron carries a fixed negative charge. Every atom has a positively charged nucleus surrounded by electrons. An atom is uncharged because it contains equal amounts of positive and negative charge. Current is a flow of electrons. It is measured in amps. A circuit can be in series or parallel. In a series circuit t...
  • Length And Resistance In Experiment Two
    1,732 words
    Aim: The resistance of a wire depends on certain factors. Investigate the effect of two of these factors - Planning Some variables that will be relevant to this investigation are: Length Thickness Temperature Voltage Resistance Material Of these the variables will be input and output voltages in experiment one, and length and resistance in experiment two. The other variables (temperature, material and voltage) will have to be kept constant in both experiments to make sure that only length, thick...
  • Record Of Results
    1,332 words
    Planning: To perform this experiment, we will work in pairs each taking a certain number of results and then putting them together. Setting up the apparatus will be one of the hardest parts of the experiment. The first thing we will do, is set our board a t an incline carefully adjusted so that no force will change the speed of our trolley, meaning once its going, it keeps going. This will be setup using a few books. After that is done, we will insert a pulley at the end of the table to make sur...
  • Conceptual Change And Experimental Strategies Effect Subjects
    860 words
    Experimental Strategies and Conceptual Change The article The Development of Scientific Reasoning in Knowledge-Rich Contexts written by Leona Schauble relates a series of experiments which give some insight as to how conceptual change and experimental strategies effect subjects of varying ages, ten fifth and sixth graders and ten non college adults. The conclusions drawn from the article are relevant in determining the cognitive strengths and weaknesses in the subjects as well as how these stren...
  • Change In Mass Of The Electrodes
    1,218 words
    To find out how varying the current affects the loss in mass of the anode and the gain in mass in the cathode Introduction - Purifying Metals It has been found that when a copper solution is electrolyzed using copper electrodes, the anode looses mass and the cathode gains mass. This is an investigation into how varying the current affects the change in mass of the electrodes during electrolysis. PREVIOUS KNOWLEDGE. From previous knowledge and preliminary experiments, I already know that- - The a...
  • Light From The Desk Lamp
    993 words
    Photosynthesis Investigation to find effects of distance of a light source from pond weed has on the amount of oxygen producedPhotosynthesisAll green plants need to be able to make their own food. They do this by a process called photosynthesis. For photosynthesis to occur they need sunlight energy. This energy is absorbed by a green pigment called chlorophyll, which is mainly found in the leaves. This energy then combinEs with water molecules (from the soil) and carbon dioxide (from the air). T...
  • Results Of Gibson And Walk's Experiment
    453 words
    In 1960, Eleanor Gibson and Richard Walk conducted an experiment to see whether depth perception is an inborn or a learned skill in humans. They conducted their experiment with a table that had a thick glass surface on half of the table and a solid base on the other half. This created an illusion of a small cliff without the dangers of actually falling. In this experiment, infants ranging from the age of 6 to 14 months were placed on the solid side of the table. The infants' mothers were placed ...
  • Length Of The Pendulum To The Period
    2,043 words
    Investigating factors which affect the period time of a simple pendulum Planning Definitions: Oscillation: Repeated motion of pendulum (to and for) Period (T): Time taken for one full oscillation In this investigation, I am going to experimentally determine a factor which will affect the period of a simple pendulum and the mathematical relationship of this factor. This type of pendulum will consist of a mass hanging on a length of string. Factors which affect the period (T) of a pendulum: -Lengt...
  • Potential Energy The Trolley
    4,455 words
    Skill Area P: Planning experimental procedures Introduction A trolley is pushed to the top of a ramp, the summit being 20 cm from the ground, and then is released. It rolls all the way down the ramp, of 2 metres, before it collides with the wall at the bottom. A couple of keen scientists thought it would be interesting to record the time taken for the trolley to reach the bottom and then calculate its average speed. They let the trolley fall down the ramp two more times after that, just to make ...
  • Normal Weight Babies
    344 words
    The journal that I choose to do is about children who fail to thrive. These children do not eat like normally children their age. The researchers in the article want to see if the children who thrive more to eat if given more energy intake. So the test will consist of twenty seven one year olds who fail to thrive and twenty seven one year old who are normal weight. They will then give the children two test meals on two separate days at their own home. They meals will either consist of a high ene...
  • Light Intensity 1 D 2 This
    3,657 words
    AIM- To identify the factors affecting the rate of photosynthesis and, choosing one factor, to ascertain the effects it has. Photosynthesis is an endothermic reaction that occurs in plants, by which plants use light energy to make glucose. It needs energy from the photons of light and it is their anabolic effect on the plant that gives the energy for the reaction to take place. During this process carbon dioxide combines with water to from glucose, and oxygen is released. The glucose made then h...
  • F 1 Generation Data Phenotype Females Males
    1,052 words
    Lab report Students perform genetic crosses with living organisms to analyze F 1 and F 2 generations. The use of monohybrid, dihybrid, and sex-linked crosses gives students a variety of experiences in interpreting data. The purpose of this lab is to use genetic crosses to illustrate independent assortment and sex-linkage in the fruit fly, Drosophila melanogaster. You will be given monohybrid, dihybrid, and / or sex-linked crosses with well-defined mutant traits. Over the course of four weeks, yo...
  • Rate Of Reaction O
    1,625 words
    The Factors That Affect the Rate of a Reaction Planning: There are different factors which can affect a rate of a reaction such as: o Temperature o Surface area o Concentration o Catalyst Concentration - If the concentration of a solution is increased there are more reactant particles per unit volume. This increases the probability of reactant particles colliding with each other Pressure - If the pressure is increased the particles in the gas are pushed closer. This increases the concentration a...
  • Incorrect Results Hexane 0 Hexane 90
    1,074 words
    I. Introduction In this experiment, lipids from ground nutmeg are extracted using a combination of solvents and identify the lipids through chromatography. The purpose of using solvent combinations is to elute the lipids based on their polarity to binding of the silica gel. The chromatography is performed on a silica gel plate and the use of iodine to visualize the lipids. By calculating the Rf values for each compound and comparing them to the known lipids, we are able to distinguish the lipids...

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