Chemical Reactions: Understanding the Basics

What are the substances called that undergo a chemical change in a reaction?

• Reactants

• Products

• Catalysts

• Precipitates

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NGSS.MS-PS1-2

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Which of the following is a sign of a chemical reaction?

• Color change

• Melting

• Freezing

• Evaporation

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NGSS.MS-PS1-2

What type of reaction absorbs energy, often in the form of heat?

• Endothermic

• Exothermic

• Catalytic

• Spontaneous

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NGSS.HS-PS1-4

What is the role of a catalyst in a chemical reaction?

• Increases reaction rate without being consumed

• Decreases reaction rate by being consumed

• Transforms into a product

• Acts as a reactant

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NGSS.HS-PS1-5

Which factor does NOT influence the yield of a chemical reaction?

• Color of the reactants

• Concentration of reactants

• Temperature

• Presence of catalysts

Tags

NGSS.HS-PS1-5

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