Energy and Chemicals

Energy and Chemicals

7th Grade

20 Qs

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Energy and Chemicals

Energy and Chemicals

Assessment

Quiz

Science

7th Grade

Practice Problem

Medium

Created by

Casey O'Hare

Used 12+ times

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20 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is an example of a chemical change?

ice melting into water

rust forming on a metal fence

sugar dissolving in water

breaking a glass into pieces

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the chemical formula H2O, how many hydrogen atoms are there?

1

2

3

4

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the solvent in a salt water solution?

salt

water

both salt and water

neither salt nor water

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which factor does NOT affect the rate of dissolution?

temperature

surface area

color of the solution

agitation

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In an energy pyramid, what happens to the available energy at each trophic level?

it increases

it stays the same

it decreases

it multiplies

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

During a physical change...

a new substance is formed

chemical bonds are broken

the molecular structure changes

the appearance changes but the substance stays the same

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many oxygen atoms are in the formula Fe2O3

1

2

3

4

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