C1 C2 C3

Question 1

What gases is the earth surrounded by?

Answer 1

Nitrogen 78%
Oxygen 21%
Argon 1%

Question 2

What do green plants give out?

Answer 2

Oxygen

Question 3

How do chemical reactions happen?

Answer 3

When atoms are rearranged

Question 4

Give an example of a chemical reaction

Answer 4

Burning, when something burns it reacts with the oxygen in the air

Question 5

What is a hydrocarbon made from?

Answer 5

Hydrogen and carbon atoms only

Question 6

Adding oxygen is called ……..

Answer 6

Oxidation

Question 7

Fossil fuels are burnt to release……

Answer 7

Energy

Question 8

Why do we burn fossil fuels?

Answer 8

To power vehicles and to produce electricity in power stations

Question 9

Where does sulfur pollution come from?

Answer 9

Impurities in fuels

Question 10

Where does nitrogen pollution come from?

Answer 10

Nitrogen in the air

Question 11

Formula of nitrogen monoxide

Answer 11

NO

Question 12

Sulfur and nitrogen pollution causes……

Answer 12

Acid rain

Question 13

Where can we reduce pollution from???

Answer 13

Power stations

Question 14

A way of reducing he amount of pollution from power stations

Answer 14

Use less electricity

Question 15

What atoms make up carbon dioxide?

Answer 15

Chemical make up. A molecule of the compound carbon dioxide contains one atom of the element carbon and two atoms of the element oxygen. Carbon is the sixth element in the periodic table

Question 16

Name a few ways that pollution can cause direct harm to humans

Answer 16

Breathing polluted air can put you at a higher risk of of asthma and respiratory fly diseases

Damages your immune system and reductive systems

Diseases such as typhoid and hookworm are caused by drinking polluted water

Question 17

Name the main element what makes up coal

Answer 17

carbon

Question 18

What are all materials made up of?

Answer 18

Chemicals

Question 19

What gas is taken in by plants in photosynthesis?

Answer 19

Carbon dioxide