Chemistry - C1

Question 1

what were the main gases volcanoes gave out?

Answer 1

carbon dioxide
water vapour (steam)

Question 2

what was the early atmosphere made out of?

Answer 2

carbon dioxide

water vapour

Question 3

when the water vapour condensed what was made?

Answer 3

oceans

Question 4

what did green plants remove from the air?

Answer 4

carbon dioxide

Question 5

what did the plants produce through photosynthesis?

Answer 5

oxygen

Question 6

what happened when the plants died?

Answer 6

they got buried and got turned into fossil fuels so the co2 wasn’t released back into the atmosphere

Question 7

what is the blue haze that surrounds earth?

Answer 7

the atmosphere

Question 8

what is the atmosphere made up of (percentages)?

Answer 8

nitrogen- 78%
oxygen- 21%
argon- 1%

Question 9

what are humans adding to the atmosphere?

Answer 9

pollutants

Question 10

what pollutants affect humans directly?

Answer 10

carbon monoxide- reduces the amount of oxygen that the blood can carry

Question 11

what pollutants affect humans indirectly?

Answer 11

sulfur dioxide- causes acid rain which can pollute rivers and lakes

Question 12

what is carbon dioxides formula?

Answer 12

2 oxygen atoms

1 carbon atom

Question 13

what is waters formula?

Answer 13

2 hydrogen atoms

1 water atom

Question 14

what does carbon dioxide increase?

Answer 14

the green house effect (global warming)

Question 15

what does CO2 dissolve in?

Answer 15

rain and sea water

Question 16

what happens if there isn’t enough oxygen around when fuel is burnt?

Answer 16

incomplete burning

Question 17

what does incomplete burning release?

Answer 17

carbon monoxide

Question 18

what is the formula for carbon monoxide?

Answer 18

1 carbon atom

1 oxygen atom

Question 19

what are tiny particles of carbon called when fuel doesn’t burn completely?

Answer 19

particulate carbon

Question 20

what do fossil fuels contain?

Answer 20

impurities

Question 21

what do some fuels contain within their impurities?

Answer 21

sulfur

Question 22

what is the formula of nitrogen monoxide?

Answer 22

1 nitrogen atom

1 oxygen atom

Question 23

what is the formula for nitrogen dioxide?

Answer 23

2 oxygen atoms

1 nitrogen atom

Question 24

what are nitrogen oxides?

Answer 24

pollutants

Question 25

what can sulphur and nitrogen oxide react with?

Answer 25

the water in clouds to make acid rain

Question 26

what are the ways we can reduce pollution?

Answer 26

• use less electricity
• take out the sulphur in natural gases and fuel oil in power stations
• burn less fossil fuels
• more efficient engines
• fit cars with catalytic converters
• oxidation
• use more public transport