Atmosphere -CHEMISTRY

Question 1

What were the gases and percentages of todays atmosphere

Answer 1

-78% nitrogen
-21% oxygen
-1% argon
-0.035% carbon dioxide

Question 2

What were the gases present in the early atmosphere?

Answer 2

-Ammonia
-Carbon dioxide
-Methane
-Water vapour

Question 3

How much oxygen was present in the early atmosphere.

Answer 3

None

Question 4

Volcanoes release…

Answer 4

Carbon dioxide and water vapour

Question 5

Water vapour ………. To form oceans

Answer 5

Condenses

Question 6

Carbon dioxide ………………. Into the oceans

Answer 6

Dissolves

Question 7

Photosynthesis by primitive plants produce….

Answer 7

Oxygen

Question 8

Levels of carbon dioxide decrease and levels of oxygen …..

Answer 8

Increase

Question 9

What are the impacts of global warming?

Answer 9

Sea levels rising
Polar ice caps melting
Droughts
Insect breakout
Extreme temp
Wild fires
Loss of species

Question 10

How is carbon dioxide produced?

Answer 10

Combustion of fossil fuels
Deforestation

Question 11

How is methane produced?

Answer 11

More animal farming
More rice fields
Decomposition of rubbish In landfill sites

Question 12

What are steps to reduce carbon footprint?

Answer 12

Eating less beef
Sending less waste to landfill sites
Charging more tax on polluting vehicles
Using biofuels

Question 13

Why is incomplete combustion caused?

Answer 13

Limited supply of oxygen

Question 14

What is the word equation for combustion

Answer 14

Methane + oxygen = carbon + water

Question 15

What is the word equation for incomplete combustion?

Answer 15

Methane + oxygen = carbon monoxide + water