8.4 Changes in Matter

Butter is melted in a pan. Which of the following is true about the change?

• It is a physical change that absorbs energy

• It is a physical change that releases energy

• It is a chemical change that absorbs energy

• t is a chemical change for which there is no change in energy.

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NGSS.MS-PS1-4

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Which of the following is not a chemical change?

• food coloring dissolving in water

• leaves turning color

• fruit ripening

• silver tarnishing

New substances are produced by a _______ change.

• Chemical

• Physical

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

The energy stored in the bonds between atoms is ______.

• Chemical Energy

• thermal energy

• electrical

• endothermic energy

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

• Sublimation

• Burning

• Rusting

• Oxidation

How could you prove that dissolving table salt in water is a physical change, not a chemical change?

• The solution would taste salty so you would know the salt is still present

• Boiling the liquid would separate the water and salt.

• Freeze the solution to see if it turns blue.

• Poor the solution in a cup to see if bubbles form.

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NGSS.MS-PS1-2

An ______ change releases energy.

• exothermic

• endothermic

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NGSS.MS-PS3-3

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The law of ______ of mass states that in any physical or chemical change, matter is neither created nor destroyed.

• conservation

• elimination

• creation

• combustion

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NGSS.MS-PS1-5

Which of the following is not a physical change?

• cooking bacon

• glass breaking

• sugar disolving

• ice melting

The form or appearance of matter is altered during a _____ change.

• physical

• chemical