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Is frying an egg a physical or chemical change?

• chemical
• physical

Which of the following is true?

• A physical property can only be seen.

• A physical property describes how matter can change when exposed to air.

• A physical property is something that can be observed about the substance by itself.

• A physical property can only be observed when two types of matter interact.

Which of the following are physical properties of the matter pictured?

Check all that are true

• reacts to oxygen

• smooth

• malleable (bendable)

• reddish-brown

• shiny

A chemical property describes how matter __________.

• smells

• reacts with another type of matter

• looks under a microscope

• dissolves when made into a solution

Jack leaves solid butter near a warm surface. When Jack returns, the butter has turned into a liquid. Jack's friend Elijah insists this is a chemical change. Is Elijah right?

• no, because no new matter was formed

• yes, because the matter changed states

• no, because the butter didn’t have enough time to go through a chemical change

• yes, because melted butter is a new type of matter

Is burning wood a chemical or physical change?

• chemical
• physical

Is glass breaking a chemical or phyiscal change?

• chemical
• physical

Is melting ice a chemical or physical change?

• chemical
• physical

Is spoiling food a physical or chemical change?

• phyiscal
• chemical

When you increase the energy by heating a liquid what happens to the motion of the molecules

• They slow down

• They speed up

• Heat doesnt change the motion of the molecules