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Physical and Chemical Changes/Law of Conservation of Matter

Total questions: 20

Worksheet time: 10mins

Name
Class
Date
1.

Which of the following is not a clue a chemical change has occurred?

a)

change in temperature

b)

change in color

c)

change in shape

d)

odor

2.

Is adding sugar to a cup of tea to create a solution a chemical or physical change?

a)

chemical

b)

physical

c)

both

3.

When a nail begins to rust because it has been outside too long this is an example of a _____________ change.

a)

chemical

b)

physical

c)

both

4.

Burning and melting a candle is a _______________ change.

a)

chemical

b)

physical

c)

both

5.

Eating and digesting a hamburger is an ______________ change?

a)

physical

b)

chemical

c)

both

6.

Using an eraser is a ____________________ change.

a)

chemical

b)

physical

c)

both

7.

Burning a log in a fire place is a ______________ change.

a)

chemical

b)

physical

c)

both

8.

When you blow bubbles into milk this is a ____________ change?

a)

chemical

b)

physical

c)

both

9.

This picture is an example of which chemical clue?

a)

temperature change

b)

precipitate

c)

smell/odor

d)

bubbles

10.

Which of the following is not a phase change of matter?

a)

condensing

b)

freezing

c)

burning

d)

boiling

11.

How many elements are in NH4OH?

a)

4

b)

3

c)

2

d)

7

12.

How many atoms of Carbon (C) are in 6C6H12O6

a)

6

b)

12

c)

36

d)

3

13.

How many total atoms are in Co(NO2)3?

a)

3

b)

7

c)

10

d)

12

14.

How many molecules are in 6CO2?

a)

6

b)

3

c)

18

d)

12

15.

Does this equation follow the Law of Conservation of Matter?

a)

Yes

b)

No

c)

Not enough information

16.

Which equation below follows the Law of Conservation of Mass/Matter?

a)

Na + Cl2 → NaCl

b)

C + O2 → CO2

c)

H + F → 3HF

d)

N + 3H → 2NH

17.

CuSO4 is a __________________.

a)

chemical equation

b)

chemical formula

c)

molecule

d)

element

e)

compound

18.

What are the reactants in this chemical equation?

a)

sunlight and chloroplast

b)

water and carbon dioxide

c)

sugar and oxygen

d)

sugar and carbon dioxide

19.

What are the products of cellular respiration?

a)

sunlight and chloroplast

b)

water and carbon dioxide

c)

sugar and oxygen

d)

there are none

20.

NaCl is a

a)

covalent bond

b)

ionic bond

c)

compound

d)

molecule

e)

salt