Fair Testing

Monday 30th May 2011:

Room 7, 8 and Mr J went over the rules of 'Fair Testing'.
With a five cent piece and an eye dropper we tested how many drops of water would fit on the coin. There were 51 drops of water in the end on the coin before the waters' skin broke.
Most of our estimations were right. We could guess 0-5, 5-10, 10-20, or 20+ drops of water.


What made the experiment a fair test
 It was a fair test because we kept the height of the dropper the same and the coin was kept on a flat surface.                                                                      

 The Equipment Used:

• 1x Eye Dropper 
• 1x 5c Coin
• 1x Desk
• 1x glass cup of water 
• Hypothesis

Fair testing...

Fair testing is where you keep everything the same, except you change only one variable each time you do a new experiment.

Wednesday 1 June

Room 8 went to the Science lab today and did an experiment with jelly beans, yummy! We all got into groups of three and got a small container. We filled it with water and vinegar then put our jelly beans in. We also put a piece of cloth in it.

Question:

Can coloured jelly beans dye a piece of cloth?

We did two experiments changing one variable in the second test. E.g Colour of jelly beans, amount or type of vinegar. 

We all brought the containers back to the class and put the containers into the back room. We left them there for a few days and most of the cloth ended up dyed.