U1 - Grade 4

Which of the following materials float in water?

• big stone

• crystal glass

• empty plastic bottle

• metal spoon

Why do boats float in water?

• Boats are made of wood which make them float.

• Boats have plastic strings which make them float.

• Men use paddles to make boats float.

• The sea breeze makes the boats float.

How will you dispose of decaying waste materials commonly found at home?

• Make them into compost fertilizer.

• Throw them into the river to feed the fishes.

• Keep them in the cabinet and use them again.

• Mix them with the non-decaying waste materials.

A glass of water is spilled on the table. What are you going to use if you want to wipe dry the table?

• cellophane

• plastic mat

• rubber band

• rug

Evaporation is __________

• the process of a gas changing into a liquid

• the process of liquid changing into a gas

• what causes matter to change state

• when it rains outside

A solid is a state of matter with…

• definite shape and size

• hards sides and won’t bend 

• no definite size or shape

• definite size but it is pourable

The tool used to measure mass is a

• ruler

• graduated cylinder

• balance scale

• thermometer

What causes matter to change state?

• Evaporation

• Condensation

• Heat energy

• A moving truck

When a liquid changes to a gas, the molecules…

•  stop moving

• heat up and move faster

• heat up but don't get any faster

• slow down and freeze

Ice changing to water is an example of what changes in state?

• solid to liquid

• liquid to solid

• liquid to gas

• gas to liquid