Physical and Chemical Changes - Video and Reflection Questions

When you mix vinegar and baking soda, bubbles form because of a __________ change.

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NGSS.MS-PS1-2

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Identify the physical changes depicted in the image.

a

b

c

d

burning

Chopping

rotting

spoiling

Melting

Shredding

Boiling

If you tear a piece of paper into smaller pieces, this is a __________ change because the paper is still paper.

The main difference between a chemical change and a physical change is.....

• A physical change alters the chemical composition; a chemical change does not.
• A chemical change is reversible; a physical change is not.
• A chemical change produces new substances; a physical change does not.
• A chemical change occurs only at high temperatures; a physical change occurs at low temperatures.

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NGSS.MS-PS1-4

Crushing a can represents a physical change because the physical form is altered or changed by its composition remains the ____.

Melting ice is an example of a ________ change.

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NGSS.MS-PS1-4

NGSS.MS-PS3-4

What happens to ice when it melts?

• Ice turns into steam when it melts.
• Ice becomes solid again after melting.
• Ice transforms into gas when it melts.
• Ice turns into liquid water when it melts.

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NGSS.MS-PS1-4

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Which of the following is an example of a chemical change?

• boiling water

• chopping wood

• melting ice

• burning wood

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NGSS.MS-PS1-2

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Why is burning wood a chemical change?

• Burning wood is a physical change because it only changes shape.
• Burning wood does not produce any new substances.
• Burning wood is a reversible process that can return to its original form.
• Burning wood is a chemical change because the chemical composition has changed.

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

Identify the chemical changes depicted in the image.

a

b

c

d

Shredding

Digestion

Combustion

Melting

Chopping

Rotting

Rusting

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NGSS.MS-PS1-2

NGSS.MS-PS1-5