Chemical Reactions Flashcard

Chemical Reactions Flashcard

Assessment

Flashcard

Chemistry

7th Grade

Practice Problem

Hard

Created by

Wayground Content

FREE Resource

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15 questions

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1.

FLASHCARD QUESTION

Front

What is a chemical reaction?

Back

A change in substances to become new substances—molecules break apart and their atoms rearrange to form new substances.

2.

FLASHCARD QUESTION

Front

What type of chemical reaction releases energy?

Back

Exothermic.

3.

FLASHCARD QUESTION

Front

What does the Law of Conservation of Mass state?

Back

The total mass of the reactants is equal to the total mass of the products.

4.

FLASHCARD QUESTION

Front

If there are 16 atoms in the reactants, how many should be in the products according to the Law of Conservation of Mass?

Back

16.

5.

FLASHCARD QUESTION

Front

What observation indicates a chemical reaction has occurred?

Back

Formation of a gas when vinegar is mixed with baking soda.

6.

FLASHCARD QUESTION

Front

What is an endothermic reaction?

Back

A chemical reaction that absorbs energy, usually in the form of heat.

7.

FLASHCARD QUESTION

Front

What is a reactant?

Back

A substance that undergoes change during a chemical reaction.

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