Chemical Reactions

Chemical Reactions

Assessment

Flashcard

Science

7th Grade

Hard

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a chemical reaction?

Back

A process where substances (reactants) undergo a transformation to form new substances (products).

2.

FLASHCARD QUESTION

Front

What are common signs that a chemical change has occurred?

Back

A chemical has turned a different color, bubbled, and/or changed temperature.

3.

FLASHCARD QUESTION

Front

How does heating affect the rate of a chemical reaction?

Back

Heating usually makes the reaction happen faster.

4.

FLASHCARD QUESTION

Front

What is the difference between a chemical change and a physical change?

Back

In a chemical change, a new substance is formed; in a physical change, no new substance is formed.

5.

FLASHCARD QUESTION

Front

What is a reactant?

Back

A substance that is present at the start of a chemical reaction and is consumed during the reaction.

6.

FLASHCARD QUESTION

Front

What is a product in a chemical reaction?

Back

A substance that is formed as a result of a chemical reaction.

7.

FLASHCARD QUESTION

Front

What is the law of conservation of mass?

Back

In a chemical reaction, mass is neither created nor destroyed; the mass of reactants equals the mass of products.

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