Physical and Chemical Changes

What is the main difference between physical and chemical changes?

• The type of matter changes in chemical changes

• The type of matter changes in physical changes

• Physical changes are more common than chemical changes

• Chemical changes are more common than physical changes

Tags

NGSS.MS-PS1-4

What is a physical change?

• A change where the type of matter stays the same

• A change where the type of matter changes

• A change that is physical

• A change that is chemical

Tags

NGSS.MS-PS1-4

What is a chemical change?

• A change where the type of matter stays the same

• A change where the type of matter changes

• A change that is physical

• A change that is chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Is baking a pie a physical or chemical change?

• Physical change

• Chemical change

• Neither

• Both

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Label the two images as examples of physical or chemical changes.

a

b

chemical change

physical change

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Gallium has a melting point of 84 degrees. When a spoon of gallium is placed in room temperature water (~70 degees), it melts. This is an example of a ​ (a)   change.

• chemical

• physical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

If you burn paper, the ​ (a)   in the paper change to molecules of ash and smoke. This is a ​ (b)   change.

• chemical

• molecules

• physical

• liquid

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS1-5

Which process describes only a physical change? (a)  

• Process 4

• Process 1

• Process 2

• Process 3

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Select all the examples of a physical change.

Which is a chemical change and which is a physical change?

b

a

Dissolving

Photosynthesis

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5