Physical and Chemical Changes

A physical change...

• changes the physical properties of an object, but does not create a new substance.

• creates a new substance and cannot be undone.

Tags

NGSS.MS-PS1-2

A chemical change

• changes the physical properties of an object, but does not create a new substance.

• creates a new substance and cannot be undone.

Tags

NGSS.MS-PS1-2

Wood that is burning in a brush pile has heat, and produces ashes.

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Is freezing juice a physical or chemical change?

• Physical Change
• Chemical Change

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Is milk going sour a physical or chemical change?

• Physical

• Chemical

Tags

NGSS.MS-PS1-2

Is this an example of a physical or chemical change? 

• Physical because it is a mixture.
• Chemical because the parts have changed shape.

Tags

NGSS.MS-PS1-2

What happened to change the state of the butter?

• More heat was added.

• Heat was taken away.

• More chemicals were added.

• The particles of the butter slowed down.

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which is NOT a physical change?

• Cutting a pizza into equal slices.
• Ice cubes melting back into liquid. water
• Baking cupcakes.
• A chocolate bar melting.

Tags

NGSS.MS-PS1-2

which of these example is a physical change?

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• 
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Tags

NGSS.MS-PS1-4

Does this picture show a chemical or physical change?

• chemical

• physical

Tags

NGSS.MS-PS1-2