Which of the following is the best definition of dissolve?

• The melting of a solid into a liquid

• When one substance breaks down into another substance

• When water is used to liquefy a solid

• When a solid and a liquid substance are separated

What is a synonym for the word molten, used in paragraph 6?

• liquid

• hardened

• magnetic

• dissolved

Tags

NGSS.MS-PS1-4

Which of the following objects is a malleable metal?

• A glass bead

• A copper coin

• A plastic toy boat

• A rock

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

• Salt dissolving in water

• Plastic being melted into a liquid

• Paper being burned into ash

• Water being boiled and creating steam

What is the main idea of the selection?

• When a chemical change occurs within a substance, it loses mass.

• Matter exists in three phases: solid, liquid, and gas.

• When a physical change occurs within a substance, it does not change its identity and matter is conserved.

• When you freeze water or slice an apple, you still have the same amount of matter as before.

Tags

NGSS.MS-PS1-4