Science CTA Review #1

Tammy is testing out what material floats best in water. What should she do to make sure her results are accurate?

• Nothing...first time is enough

• repeat the same experiment a few times and look over the results

• Make a graph

• test a new material each time

What is a control group in an experiment?

• The materials you use

• bossing around your lab partner

• What your teacher tells you to do

• part of your lab that you do not change but compare everything else to

In the scenario, why is the control group taking a test in a normal and quiet room? Choose ALL that apply

• The control group will give the "normal" data we can compare with the other

• So I can compare the results and see if noise makes kids do worse on tests

• They are good kids

• they hate noise

True or False: Water with salt in it takes longer to boil compared to plain water.

• True

• False

True or False: Experiments are meant to be replicated, so you should write down your steps, results and conclusions.

• True

• False

What does replicate mean?

• uncover

• test

• make a copy

What does this tool measure?

• temperature

• mass

• texture

• volume

True or False: When sand is added to water it either hangs in the water or forms at the bottom. Sand is insoluble

• False

• True

Physical or Chemical Change?

• Chemical

• Pyhsical

• Both

• Neither

Which is NOT an example of a liquid to a solid?

• ice cubes

• steam

• sleet/hail

• popsicle