SCIENTIFIC THINKING

What is a Fair Test in science?

• Not cheating on your exam

• An experiment designed so only one thing is changed.

• An exam that you know the answer to.

• An experiment designed so only two things are changed.

What was our hypothesis in the drops on coin experiment?

• The 10 kurus coin would hold more drops because it is larger

• The 5 & 10 kurus coins would hold the same number of drops

• The 5 kurus coin would hold more drops because it is smaller

The numbers up the left side of the graph are

• The number of drops on the coins.

• How mant times we got a number of drops.

The numbers along the bottom of the graph are

• The number of drops that fit on a coin in 1 attempt (trial)

• The number of times you got that count.

What did all the grade 5 data show?

• The data showed the 10 kurus held more drops.

• The data showed 5 & 10 kurus held equal number of drops.

• The data showed that the drop size changed.

Why were some classmates able to get much larger numbers of drops on a coins?

• The drops just got higher.

• The drops were not counted correctly.

• The drops just streched further over the edge.

• The drops were smaller.

What question did we ask after seeing the average number of drops was the same on each coin?

• Were the size of drops changing?

• Did the 5 kurus really hold the same number of drops.

• Was this a fair test if more than one thing changed?

• All of these

Mr Mac tested how much water the coins held, using _______________ to measure the volume of water on the coins.

• a dropper

• counting drops

• a beaker

• a graduated cylinder

This coin is just about to spill because ________.

• The water piled up too high.

• The water stretched out over the sides.

What is the evidence for changing drop size on 5 & 10 kurus?

• 100 drops 12mm high if just grew taller, this is impossible!

• graduated cylinder measure shows more water on 10 kurus.

• in video drops wider not taller, & most spill near 25 drops

• some filled kurus with 1-10, others 100-110