Science Review

The freezing point of water

• the change of a gas to a solid directly without first becoming a liquid

• 100C/212F

• 0C/32F

• the change of a liquid to a solid due to low temperature

Objects or liquids with higher DENSITY are more likely to....

• sink

• float

• dance

• expand

evaporation

• the process by which matter changes from a solid to a liquid

• energy (heat)

• when a liquid changes to a gas at its surface below the boiling point

• physical

A student dropped a ball and a key into a beaker of water. Her results are shown below. Based on her results, what can she infer about the ball and the key?

• The key is less dense than the water

• The ball is less dense than the water.

• The ball is more dense than the water

• The key and the ball have the same density as the water

A student wanted to make a toy for her baby sister to use in the bathtub. If she wants the toy to float, which material should she use?

• wood

• paper

• cotton

• copper

4. A student was testing the following materials to see which of them would conduct electricity: aluminum foil, string, wooden block and a glass marble. Which of these items completed the circuit and allowed the lamp to light?

• aluminum foil

• string

• glass marble

• wooden block

1. A student designed an experiment to find out which type of cup would keep the water the coolest. When he does the experiment he should change –

• the temperature of water

• the size of the cups

• amount of water

• the kind of cups used

Melting is...

• Has no definite shape, but has a a definite volume

• the process by which matter changes from a solid to a liquid

• when a liquid changes to a gas at its surface below the boiling point

• the change of a gas to a solid directly without first becoming a liquid

True or false: All metals are magnetic

• True

• False

These two ends of magnets come close together - what will they do?

• Attract each other

• Repel each other

• Explode

• Nothing