Science Chemical and Physical Changes Review

Two clear liquids are mixed together. When mixed the two liquids bubble and turn blue. You just witnessed a

• physical change

• chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is an example of a chemical change?

• heat is added to a powder

• two liquids are mixed together

• a new gas is produced

• two powders are mixed together

Tags

NGSS.MS-PS1-2

Which is evidence a chemical change is taking place?

• smoke is produced

• the item changes sizes

• the item changes shape

• the item melts

Tags

NGSS.MS-PS1-2

Which is evidence of a physical change?

• Smoke is produced.

• The matter changes its shape.

• A flame forms when mixing matter together.

• The mixed liquids start to bubble and and fizz.

Glass shatters on the ground.

• physical change

• chemical change

You sharpen a pencil.

• physical change

• chemical change

You make chocolate milk.

• physical change

• chemical change

Baking soda and vinegar mixed together produce a gas.

• physical change

• chemical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What happens to water molecules when they are heated up?

• The molecules slow down and spread apart.

• The molecules speed up and stay close together.

• The molecules speed up and spread apart.

• The molecules don't do anything.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When heat is removed from the water the molecules

• nothing happens.

• slow down and spread apart.

• speed up and are close together.

• slow down and come closer together.

Tags

NGSS.MS-PS1-4