Unit 3 | Chemical and Physical Changes

Which example is not a physical change?

• separate five bananas from the bunch

• peel bananas

• cut bananas

• bananas turn brown

When did a chemical change occur?

• Nail 1 was put in the oven.

• Nail is cut into equal parts.

• Nails sits outside and turns red.

• Nail was bent into a different shape.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Pick the answers that states a chemical change.

• Tin metal is placed over a fire and heats up.

• Strip of paper is burned and a new substance is formed.

• Water is boiled and disappears.

• Solid wax melts.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Ice forms because heat is removed, causing the particles to move slower. This changes the water from a liquid to a solid.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When water freezes...

• heat is removed, and a solid is formed.

• heat is removed and a liquid is formed.

• heat is added and a solid is formed.

• heat is added and a liquid is formed.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

NGSS.MS-PS3-5

Bubbles form because heat is removed, causing themolecules to move quickly as the water boils.

• True

• False

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

FILL IN THE BLANK: Removing heat from liquid water will cause the movement of the molecules to ____, forming a ______.

• decrease; liquid

• decrease; solid

• increase; liquid

• increase; solid

Tags

NGSS.MS-PS1-4

A change from liquid to gas is a:

• chemical change

• mixture

• physical change

• chemical substance

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

When heat is removed, molecules in the water slow down, causing the liquid to become a solid.

• True

• False

Tags

NGSS.MS-PS1-4

Adding heat causes the molecules of water to move slower and closer together, resulting in a change of state.

• True

• False

Tags

NGSS.MS-PS1-4