Exercise

Which of these objects is the heaviest?

• 
• 
• 
• 

What is weight?

• How cold something is.

• What something is made up of.

• How an object feels.

• How heavy an object is.

A solid is ....

• fill its container

• can change shape and size

• has its own shape

• spreads out to fill its container

How can you change liquid water into a solid?

• Freeze the water

• Melt the water

• Boil the water

• Pour the water

What does wood change into when it burns?

• Ice

• Fire

• Ash

• Rust

What is true about rust?

• It can change back to iron.

• It is strong.

• It is made from iron and oxygen.

• It is the same color as iron.

Anything that take up space and has mass is called ....

• matter

• air

• mass

• volume

Why do the ice cubes float in the lemonade?

• Because lemonade is lighter than ice cubes.

• Because ice cube is lighter than lemonade.

Students built a snowman yesterday. Today the sun is shining bright. What will happen to the snowman?

• It will freeze.

• It will get colder.

• It will change to a solid.

• It will change to liquid.

Boil means to heat ... until it becomes ....

• liquid, gas

• gas, liquid

• liquid, solid

• solid, gas