Physical and Chemical Change

Which is needed for both boiling and melting to occur?

• solids

• gases

• heat

• pressure

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Freezing point is

• The temperature at which a liquid changes to a gas. The boiling point of water is 100 °C.

• The temperature at which a liquid changes into a solid. A substance's freezing point is the same as its melting point. The freezing point of water is 0 °C.

• The changes that happen to substances during a chemical change.

• The temperature at which a solid becomes a liquid. The melting point of water is 0 °C.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Is melting butter for popcorn a chemical or physical change?

• chemical change

• physical change

Tags

NGSS.MS-PS3-4

NGSS.MS-PS3-5

A change in the size, shape, or state of matter.

• chemical change

• physical change

Tags

NGSS.MS-PS1-4

Which of the following is a sign that a chemical reaction has occurred?

• change in shape

• formation of a gas

• melting

• dissolving

Tags

NGSS.MS-PS1-2

Which of the following is NOT an example of a physical change?

• crumpled paper

• pencil sharpening

• shrunken clothing

• rust

Tags

NGSS.MS-PS1-2

A change where one or more new substances are created.

• Physical Change

• Chemical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Rust on an iron bar is an example of chemical change.

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

When you break a cracker into pieces it is a _________.

• Chemical change

• Physical change

Digesting your food is an example of _____________.

• chemical change

• physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5