Physical vs Chemical Changes

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

• change in shape
• melting
• formation of a gas
• dissolving

Is melting butter for popcorn a chemical or physical change?

• chemical
• physical

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

• crumpled paper
• pencil sharpening
• shrunken clothing
• rust

Freezing Juice?

• Physical Change
• Chemical Change

A change where one or more new substances are created.

• Physical Change 
• Chemical Change 

Fizzing, foaming, and burning are all examples of

• Chemical change
• Physical change

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

• True 
• False

What kind of properties can only be observed when a substance changes into a different substance?

• physical properties
• chemical properties

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

• Chemical change
• Physical change

A mixture is the result of a physical change because...

• The parts can be separated
• A new substance is made
• There is a chemical reaction
• One part of the mixture disappears