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Science Essay Examples

Fruits to make a fruit battery

Magnesium, due to its reactivity, has a very high potential energy, so the electrons travel from it to the copper, which has a very low potential energy due to its unreactivity. The difference in the potential is called the cell potential difference. If the difference of potential energy is large, then clearly the voltage produced…

The effect of temperature on a squash ball

I did a preliminary experiment to see if my method would work and if there were any problems with the way I will conduct my experiment. Preliminary Results Temperature (i?? C) Distanced Bounced (Cm) 90 81 40 68 0 20 Factors affecting my experiment If I use different squash balls of different elasticity it will…

Osmosis Essay

Osmosis is a form of passive transport, and a specialised form of diffusion. It is the movement of water from a dilute solution to a more concentrated one, through a semipermeable membrane. Hence it is where water moves from a high to a low concentration. I will design an experiment to test this process on…



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The neutralisation of Acids by Antacids

An Investigation to See What Effects the Neutralisation of Acids by Antacids In this experiment I will be looking at what affects the rate of reaction in a chemical reaction between Hydrochloric acid and commercial antacids. I will be looking at one of the Rates of reaction, surface area, to see if a smaller surface…

Propanol and Butanol

To investigate and compare the relationships between the amounts of energy released from different alcohols in the alcohol series. BACKGROUND INFORMATION Alcohols are a series of organic homologous compounds with the general formula of C(n) H(2n+1) OH. They gain their properties, which are different to those of other compounds in the homologous series due to…

Concentration and rates of reaction

I am investigating the effect of the concentration of Hydrochloric Acid on the speed of the reaction between Sodium Thiosulphate and Hydrochloric Acid. When these react together, sulphur is formed. A balanced chemical equation for the reaction is… Na2S2O3 + 2HCl –> S + 2NaCl + SO2 + H20 Apparatus Total of 10cm3 of distilled…

Constantan and Nichrome

If the length of the wire is doubled, the electrons bump into twice as many ions so there will be twice as much resistance. I’m going to summary my prediction to make it very clear. Longer the wire the more resistance the material has to electrical current compared to the short wire. This is so…

Surface area of calcium carbonate

Introduction: The experiment taking place is between calcium carbonate [CaCO3] and hydrochloric acid [HCl]. Calcium carbonate, also known as marble, is a metamorphic rock. This is a rock that is formed over long periods of time under high temperature and pressure. It is also formed when carbon dioxide reacts with calcium hydroxide to produce calcium…

Factors affecting Osmosis in Potato Tissue

We will connect the calibrated gas syringe to the side armed flask. We will place the strip of magnesium ribbon into the side armed flask at the same time as putting in the bung and starting the stop clock. We will time how long the reaction takes until it is stopped and record the results….

Moon Landing exercise

Moon Landing Exercise What went well and what are areas of improvement? The team performance on Moon landing exercise was much better than the individual performance which was the first thing that went well as a group. The learning from this task was, “for complex task there is potential for better results with team”. Also…

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