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7th Grade 4th Nine Weeks Test

Authored by Cartalia Lott

Science

7th Grade

NGSS covered

Used 2+ times

7th Grade 4th Nine Weeks Test
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

To balance a chemical equation, which of the following can be adjusted?

Subscripts

Coefficients

Both A and B

The reactants

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The law that states that matter is never created or destroyed in a chemical reaction is known as the:

Law of Attraction

Conservation Law of Energy

Law of Conservation of Mass

Law of Combining Volumes

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to balance chemical equations according to the Law of Conservation of Mass?

To have the same number of atoms on both sides

To predict the outcome of experiments

To demonstrate the Law of Chemical Equilibrium

To prove the Law of Definite Proportions

Tags

NGSS.MS-PS1-5

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the equation 2 AgNO3 → 2 Ag + O2 + 2NO2, the AgNO3 is a:

Reactant

Product

Tags

NGSS.MS-PS1-5

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the arrow in a chemical equation represent?

Change in state

A reaction taking place

Heat being applied

The speed of the reaction

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to the equation CO + H2 → CH3OH, how many hydrogen atoms are on the right side of the equation?

2

4

3

1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If a chemical equation has unequal numbers of atoms on each side, one must:

Change the subscripts

Add or adjust coefficients

Increase the temperature

Add catalysts

Tags

NGSS.MS-PS1-5

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