Free Printable Chemical and Physical Changes Revision 2022 Y8

Free Printable Worksheets

Worksheets

Chemical and Physical Changes Revision 2022 Y8

Total questions: 59

Worksheet time: 30mins

Name

Class

Date

1.

What type of change can be easily reversed?

a)

chemical change

b)

physical change

c)

both chemical and physical changes

d)

neither physical or chemical changes

2.

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

a)

a bike rusting

b)

toast burning

c)

butter melting

d)

food spoiling

3.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

4.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

5.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

6.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

7.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

8.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

9.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

10.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

11.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

12.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

13.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

14.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

15.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

16.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

17.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

18.

Is this an example of a physical or chemical change?

a)

physical

b)

chemical

19.

Is this an example of a physical or chemical change?

a)

physical

b)

change

20.

What type of change CAN'T be be easily reversed?

a)

chemical change

b)

physical change

c)

both chemical and physical changes

d)

neither physical or chemical changes

21.

When new substances are made

a)

Chemical Change

b)

Physical Change

22.

When a material changes shape but you are not making anything new

a)

Chemical Change

b)

Physical Change

23.

No new substances are made

a)

Chemical Change

b)

Physical Change

24.

What does arrow W represent ?

a)

boiling (evaporating)

b)

freezing

c)

melting

d)

condensing

e)

none of them

25.

What does arrow T represent ?

a)

boiling (evaporating)

b)

freezing

c)

melting

d)

condensing

e)

none of them

26.

What does arrow S represent ?

a)

boiling (evaporating)

b)

freezing

c)

melting

d)

condensing

e)

none of them

27.

What does arrow R represent ?

a)

boiling (evaporating)

b)

freezing

c)

melting

d)

condensing

e)

none of them

28.

Which letter shows melting ?

a)

R

b)

S

c)

T

d)

W

e)

none of them

29.

What state of matter is pictured?

a)

Solid

b)

Liquid

c)

Gas

d)

Plasma

30.

Which of these isn't in the fire triangle?

a)

Fuel

b)

Heat

c)

Oxygen

d)

Carbon dioxide

31.

Another term for burning is

a)

Fire triangle

b)

Magnesium oxide

c)

Combustion

d)

Bustion

32.

The conditions which are required for combustion to take place are:

a)

fuel

b)

heat

c)

oxygen

d)

all of these

33.

What are the types of combustion?

a)

Complete & incomplete

b)

Incomplete & inexact

c)

Impossible & complete

d)

Computer & incompete

34.

Complete combustion is when there is plenty of oxygen to react with.

a)

True

b)

False

35.

Incomplete combustion is when there is a limited amount of oxygen.

a)

True

b)

False

36.

What does incomplete combustion produce that complete combustion doesn't?

a)

Carbon monoxide

b)

Water

37.

What are the two PRODUCTS in an incomplete combustion reaction?

a)

Carbon Monoxide and Water

b)

Carbon Dioxide and Water

c)

Carbon and Water

d)

Fuel and Oxygen

38.

Carbon monoxide can replace oxygen in the blood.

a)

True

b)

False

39.

You can tell if you have been exposed to carbon monoxide because you can smell it.

a)

True

b)

False

40.

Carbon monoxide is a colourless and odourless gas

a)

true

b)

false

41.

Which is NOT a symptom of carbon monoxide poisoning?

a)

feeling hyper

b)

headache

c)

dizziness

d)

nausea

42.

Carbon monoxide kills by attaching itself to which cells in the body?

a)

red blood cells

b)

white blood cells

c)

muscle cells

d)

cardiac cells

43.

You can prevent carbon monoxide poisoning by

a)

having a BBQ inside

b)

not replacing a battery in your carbon monoxide alarm

c)

servicing all gas appliances on a regular basis

44.

Silent, invisible killer- which gas is often described with these words?

a)

oxygen

b)

carbon dioxide

c)

carbon monoxide

d)

sulfur dioxide

45.

Carbon monoxide is a product of

a)

complete combustion

b)

incomplete combustion

46.

CO- name this chemical compound

a)

carbon monoxide

b)

carbon dioxide

47.

CO₂ - this chemical compound is made during incomplete combustion of fuels

a)

true

b)

false

48.

This change of matter is called- type in the 3 missing letters

_ _ _ limation

(a)

49.

The nail in test tube A rusted the most. What did test tube A contain that test tube B didn't?

a)

Salt

b)

Water

c)

Oxygen

d)

Carbon dioxide

50.

Why did the nail in test tube C NOT rust?

a)

because there was water present

b)

because oil prevented the oxygen from entering the test tube

c)

because there was too much salt

d)

because there was too much oxygen

51.

Select all the things that are needed for rust to occur

a)

iron

b)

water

c)

oxygen

d)

oil

52.

What is the name of the missing product?

a)

carbon dioxide

b)

iron chloride

c)

hydrated iron oxide

d)

iron sulfide

53.

What is the name of the missing reactant?

(a)

54.

What is the name of the missing reactant?

(a)

55.

In this equation for rust, oxygen is a

a)

reactant

b)

product

56.

In this equation for rust, hydrated iron oxide is a

a)

reactant

b)

product

57.

The nail in test tube A rusted the most because Test tube A contained salt. Salt helped the reaction happen faster because salt was a

a)

reactant

b)

product

c)

catalyst

d)

synthesis

58.

How could you prevent the bike frame from rusting?

a)

coat it with oil or grease

b)

paint it

59.

How could you prevent a chain on the bike from rusting?

a)

paint it

b)

Spray with oil or grease

100 %

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