Today we
had a ‘liquid race’! We experimented
with different liquids to see which ones were fast and which ones were
slow. We had to make a ‘hypothesis’
before we started and guess which ones we thought would be fast and which would
be slow. We also had to think about how
to make it a ‘fair’ experiment and so decided that we would keep the board at the
same angle every time and use the same amount of liquid dropped at the same
place. This was quite difficult so Miss
Shearer dropped it down the board for us.
The
results were interesting!
The water
was the quickest – it took less than one second to reach the bottom of the
board! Mr MacLeod could hardly get the stopwatch
clicked in the right time! Of course we
didn’t manage to get any photos of the water – it was too fast.
We also
tested vegetable oil which only took 5 seconds to reach the bottom. Most of us thought that these two liquids would
be the quickest.
Next up
was golden syrup. Quite a lot of us
thought this would be a slow moving liquid but were very surprised that it only
took around 2 minutes to reach the bottom of the board. Quite a few of us were interested in taste
testing it as well!
The spoonful
of shampoo took a record 10 minutes to reach the bottom of the board – we had
to watch it very closely to ensure it was moving.
Finally we
tested the tomato sauce and as predicted it took a very long time to reach the
bottom of the board! So long in fact we had to go to a Pantomime Practice. Around 40 minutes later it had reached the
bottom of the board in one big blob!
This was a
great experiment and it was interesting to look back at our hypothesis and what
would thought would happen at the beginning.
We then wrote up our experiment in a scientific way using technical vocabulary
and headings.
We took a
few photos but we were too involved in the experiment to remember to be
photographers!