Law of Conservation of Mass

Law of Conservation of Mass

Assessment

Assessment

Created by

Sheila Holt

Science

7th Grade

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10 questions

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1.

Multiple Choice

2 mins

12 pts

What is the Law of Conservation of mass?

Mass is created in a chemical reaction

Mass is created in a physical change

New chemicals formed from a chemical reaction have a larger overall mass than the original reactants

Mass is never created or destroyed

2.

Multiple Choice

1 min

1 pt

In a reaction A + B ----> C,  reactant A has 5g and product  C has 9g. How many grams does reactant B should have? 

4g

5g

9g

14g

3.

Multiple Choice

45 sec

1 pt

The number in front of a compound or element is a 

Subscript

Coefficient

Superscript

Charge

4.

Multiple Choice

45 sec

1 pt

The number to the lower side of an element is a 

Subscript

Superscript

Coefficient

Charge

5.

Multiple Choice

45 sec

1 pt

Matter can not be created nor destroyed: it can only be

Destroyed a little bit

Invisible

Transformed, changed

None of the above

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