Free Printable Physical and Chemical Change

Worksheets

Physical and Chemical Change

Total questions: 13

Worksheet time: 7mins

Name

Class

Date

1. When baking soda and vinegar combine is that a physical or chemical change? Give EVIDENCE to support your answer.

a. physical- because baking soda dissolves

b. physical - because gas is released

c. chemical- because the baking soda dissloves

d. chemical- because gas is released

2. Is cutting vegetables a physical or chemical change? Give EVIDENCE to support your answer.

a. physical- the vegetables are changing shape

b. physical - the vegetables change density

c. chemical- the vegetables are changing shape

d. chemical- the vegetable change density

3. Is a bike rusting a physical or chemical change? Give EVIDENCE to support your answer.

a. physical- the rust forming is a new substance

b. physical- the bike's density changed

c. chemical- the rust forming is a new substance

d. chemical - the bike's density changed

4. Is dissolving sugar a physical or chemical change? Give EVIDENCE to support your answer.

a. physical - the sugar is still present

b. physical- the sugar is gone

c. chemical - the sugar is still present

d. chemical - the sugar is gone

Which of the following chemical reactions correctly represents the Law of Conservation of Mass?

2H2+ 2O2→2H2O

4K + 2O2→2K2O

4Mg + 2O2→4MgO

HCl + 2NaOH→2NaCl + H2O

5. Is burning a piece of paper a physical or chemical change? Give EVIDENCE to support your answer.

a. physical - the paper changes shape

b. physical - the paper turns black

c. chemical - new substances like ash and smoke are formed

d. chemical - the paper is torn

6. Is melting ice a physical or chemical change? Give EVIDENCE to support your answer.

b. physical - the ice disappears

c. chemical - new substances are formed

a. physical - the ice changes state but is still water

d. chemical - the ice changes color

7. Which of the following reactions demonstrates the Law of Conservation of Mass?

2Na + Cl2 → 2NaCl

C + O2 → CO

2H2 + O2 → H2O2

N2 + 2H2 → NH3

8. Is boiling water a physical or chemical change? Give EVIDENCE to support your answer.

d. chemical - the water disappears

c. physical - the water changes color

b. chemical - new substances are formed

a. physical - the water changes state but remains water

10.

9. Is frying an egg a physical or chemical change? Give EVIDENCE to support your answer.

b. chemical - new substances are formed as the egg cooks

a. physical - the egg changes shape

d. chemical - the egg cools down

c. physical - the egg turns white

11.

10. Is toasting a slice of bread a physical or chemical change? Give EVIDENCE to support your answer.

a. physical - the bread changes shape

d. chemical - the bread is sliced

b. chemical - new substances like a brown crust are formed

c. physical - the bread gets warmer

12.

12. Is dissolving salt in water a physical or chemical change? Give EVIDENCE to support your answer.

a. physical - the salt can be recovered by evaporation

b. chemical - new substances are formed

c. physical - the water changes color

d. chemical - the salt disappears forever

13.

Is evaporating alcohol a physical or chemical change? Give EVIDENCE to support your answer.

a. chemical - new substances are formed

b. physical - the alcohol changes state but remains alcohol

d. chemical - the alcohol disappears forever

c. physical - the alcohol changes color

100 %

Physical and Chemical Change

Total questions: 13

Worksheet time: 7mins

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