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Unit 3 Review Y23-24

Unit 3 Review Y23-24

Assessment

Flashcard

Science, Other

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 the law of conservation of mass?

Back

Matter cannot be created or destroyed in a chemical reaction; it can only be transformed.

2.

FLASHCARD QUESTION

Front

If a reaction starts with 20g of reactants, how much product will be produced?

Back

20g of products.

3.

FLASHCARD QUESTION

Front

What happens to the mass of reactants during a chemical reaction?

Back

The mass of the products equals the mass of the reactants.

4.

FLASHCARD QUESTION

Front

What is produced when calcium carbonate (CaCO3) is heated?

Back

Calcium oxide (CaO) and carbon dioxide (CO2).

5.

FLASHCARD QUESTION

Front

If 24g of magnesium reacts with 38g of fluorine, what is the total mass of magnesium fluoride produced?

Back

62g of magnesium fluoride.

6.

FLASHCARD QUESTION

Front

What does it mean to transform matter?

Back

To change matter from one form to another without changing its mass.

7.

FLASHCARD QUESTION

Front

What is an example of a chemical change?

Back

Burning wood, which transforms it into ash and gases.

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