T2.2 Chemical Change

What is a physical change?

• A change that alters the form or appearance of a substance without changing it into a different substance.

• A change that creates a new substance with different properties.

• A change that only occurs at the molecular level.

• A change that involves the release of energy.

Tags

NGSS.MS-PS1-4

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

• Rusting of iron

• Boiling water

• Burning wood

• Baking a cake

What is a chemical change?

• A change in matter that produces one or more new substances.

• A change in matter that does not produce new substances.

• A change in the state of matter.

• A change in the size of matter.

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What are reactants?

• Substances that undergo physical changes

• Substances that undergo chemical changes

• Substances that remain unchanged

• Substances that are products of a reaction

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NGSS.MS-PS1-1

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which of the following best describes reactants in a chemical reaction?

• Substances that are formed as a result of the reaction

• Substances that undergo chemical changes

• Substances that do not participate in the reaction

• Substances that are catalysts in the reaction

What are products in a chemical reaction?

• The substances that are consumed in the reaction

• The substances that are formed from the reactants

• The substances that initiate the reaction

• The substances that remain unchanged

Tags

NGSS.MS-PS1-5

When do chemical changes occur?

• When atoms lose protons

• When existing bonds break and new bonds form

• When atoms gain neutrons

• When molecules split into atoms

Tags

NGSS.MS-PS1-2

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How do atoms bond?

• By sharing or transferring protons

• By sharing or transferring neutrons

• By sharing or transferring electrons

• By sharing or transferring nuclei

What does a color change in an object typically indicate?

• The object has melted.

• A new substance has formed.

• The object has been broken.

• The object has been cooled.

Tags

NGSS.MS-PS1-2

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Which of the following is an example of a color change indicating a new substance?

• Ice melting into water

• Toast turning brown

• Water boiling

• Metal being cut

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5