C14- the earths atmosphere

Question 1

what do volcanos produce

Answer 1

carbon dioxide, nitrogen and a bit of methane and ammonia

Question 2

how did oceans form

Answer 2

from condensed water

Question 3

how were sediments formed

Answer 3

carbon dioxide dissolved in the oceans and carbonates precipitated (turned into solid bits)

Question 4

green plants and algae took in

Answer 4

carbon dioxide and released oxygen in photosynthesis

Question 5

what was the impact of sedimentary rocks and fossil fuels forming

Answer 5

decrease in carbon dioxide levels

Question 6

what % of the world was nitrogen

Answer 6

78

Question 7

what % of the world was oxygen

Answer 7

21

Question 8

what are the main greenhouse gases

Answer 8

carbon dioxide
methane
water vapour

Question 9

human activities increase the level of

Answer 9

carbon dioxide and methane

Question 10

how does co2 go to the atmosphere

Answer 10

burning fossil fuels
deforestation

Question 11

how does ch4 go to the atmosphere

Answer 11

cows
landfill

Question 12

effects of climate change

Answer 12

rising sea levels
drought
extreme weather
changes in wildlife distribution

Question 13

what is the carbon footprint

Answer 13

total amount of co2 and other greenhouse gases emitted over the full life cycle of a product service or event

Question 14

solutions of climate change

Answer 14

reduce carbon footprint
use less fossil fuels
eat less meat