Bell ringer 3/2: Chemical Vs. Physical

Liz knows that changes can alter the looks or shape of a substance. Cutting, melting, bending, or crushing are examples of what kind of change?

• reactant

• product

• chemical

• physical

After reading about the kinds of changes that occur, Liz saw some rust on a pipe that was going into her house. What kind of change is the formation of rust?

• reactant

• product

• physical

• chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

After learning about chemical reactions, Olivia investigated different kinds of chemical changes using substances she found in her kitchen so she could see these changes. Which of the following can occur when a chemical reaction takes place? Choose the three statements that apply.

• New bonds form.

• Existing bonds break.

• New substances form.

• Changes don’t affect matter.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Kim understands that there are several signs that indicate a chemical reaction has occurred. What is the best way to be certain that a chemical reaction has occurred?

• Some bubbles form.

• A color change occurs.

• A new substance forms.

• The materials do not react.

Tags

NGSS.MS-PS1-2

Is a firefly lighting up a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

Is water melting a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

Is salt dissolving in water a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

Is digesting your food a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-LS1-7

Is getting a tan a physical or chemical change?

• Physical
• Chemical

Is melting iron a physical or chemical change?

• Physical
• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4