Science Unit 5, Lesson 2

Solid, liquid, and gas are three ______ of matter.

• containers

• states

• chemicals

• substances

The temperature at which a solid changes to a liquid is its _______ point.

• state

• boiling

• melting

• chemical

The temperature at which a liquid changes to a gas is its _______ point.

• melting

• physical

• chemical

• boiling

The atoms of a substance change in a ______.

• chemical change

• physical change

• melting change

• boiling change

Which state of matter does this show?

• solid

• liquid

• gas

• all of the above

What is NOT true about a solid?

• It has a set shape.

• It has a set volume.

• It takes the shape of its container.

• Its atoms are very close together.

What is NOT true about a liquid?

• It has no set shape.

• It has a set volume.

• It takes the shape of its container.

• It can't change into a gas.

What is NOT true about a gas?

• It has a set shape and volume.

• It has no set shape or volume.

• It expands to fill any container.

• Its atoms move fast and are far apart.

What is TRUE about boiling and melting points?

• ALL substances melt at 0° and boil at 100° Celsius.

• Each substance has its own boiling and melting point.

• The melting and boiling points of all matter are 50° Celsius.

• None of the above

What happens when the temperature of water is higher than 100° Celsius?

• Water changes into a gas.

• Water makes a physical change.

• Water changes state but its atoms remain the same.

• All of the above