Scientific Experiment Report - 2nd Formative
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The student conducted an experiment to test whether heavier coins would reach the bottom of a bottle faster than lighter coins. Four coins of different denominations were dropped from 70cm above a bottle filled with 800ml of water, and the time taken for each coin to reach the bottom was recorded. The heaviest coin, the Dubai coin, took the least average time of 0.855 seconds to fall, disproving the hypothesis that heavier coins would fall faster. The student concluded that coin weight did not impact falling time in water and suggested modifying variables like water amount or drop height for further experiments.
Scientific Experiment Report - 2nd Formative
- 1. + Coins Gravity By Nancy 6A
- 2. + Problem / Question Will the heaviest coin touch the bottom of the drinking bottle faster?
- 3. + Observation / Research Gravity the force that attracts a body toward the center of the earth, or toward any other physical body having mass.
- 4. + Hypothesis I think that the heaviest coin will need less time to touch the bottom of the bottle because it will drift through water faster.
- 5. + Independent Variable Kind of coin Im going to use Dubai coin, Rp. 1,000 coin, Rp.500 coin and Rp. 200 coin.
- 6. + Dependent Variable In this case, it will be the time the different kinds of coins will touch the bottom of the bottle faster.
- 7. + Control Variable The kind of bottle The amount of water The height from where the coin will be dropped from
- 8. + Experiment
- 9. Materials Equipment 800 ml of water 4 different kinds of coin (Dubai coin, Rp. 1,000 coin, Rp.500 coin and Rp. 200 coin) 1 drinking bottle with wide opening 1 measuring cup 1 stopwatch 1 m ruler
- 10. + Measure 800 ml of water using the measuring cup and pour it inside the water bottle after removing the cover. Steps / Procedure (1st)
- 11. + Steps / Procedure (2nd) Place the 1 m ruler behind the bottle.
- 12. + Steps / Procedure (3rd) Drop the different kinds of coins from 70 cm and count the time using the stopwatch.
- 13. + Steps / Procedure (4th) Record the data.
- 14. + Kinds of Coins Trials (Time needed) Average 1st 2nd 3rd 4th Dubai coin 0.95 sec 0.53 sec 1.35 sec 0.59 sec 0. 855 sec Rp. 1,000 coin 0.56 sec 0.60 sec 0.61 sec 1.38 sec 0. 7875 sec Rp.500 coin 0.65 sec 0.98 sec 0.91 sec 0.91 sec 0. 8625 sec Rp. 200 coin. 1.20 sec 1.40 sec 0.98 sec 1.53 sec 1. 2775 sec
- 16. + Conclusion So, my hypothesis is not proven because all the coins weigh the same but the Rp. 1,000 coin needs least time to drift through water faster (in average). Next time, if we do this experiment again, we can modify it by changing the dependent variable which is the different kinds of coins into different amount of water or the height we will drop the coin from.