Chemical and Physical Reactions

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

• True

• False

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• change in shape

• melting

• formation of a gas

• dissolving

Tags

NGSS.MS-PS1-2

Is melting butter for popcorn a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-2

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

• crumpled paper

• pencil sharpening

• shrunken clothing

• rust

Olivia and Mason were having a science experiment in the kitchen. Olivia left a glass of milk on the counter overnight as part of their experiment. The next day, they discovered it had gone sour. This is a (a)   change.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

Bubbles form when two or more substances are combined is a (a)  

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

In a chemical reaction, what are the substances called that start the reaction?

• Products

• Catalysts

• Reactants

• Enzymes

Tags

NGSS.MS-PS1-1

Bubbles form when two or more substances are combined is a (a)   (b)  

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

An explosion occurs is a (a)  

• Chemical Change

• Physical Change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

NGSS.MS-PS1-1

Which of the following does NOT indicate a chemical change?

• color change

• A new smell is produced.

• A new substance is created.

• shape change

Tags

NGSS.MS-PS1-2