C13

Question 1

What gases (probably) made up Earth’s early atmosphere?

Answer 1

Carbon dioxide, nitrogen, water vapour and traces of methane and ammonia

Question 2

How did carbon become ‘locked’ into the Earth over time?

Answer 2

-Remains of carbon life forms buried under sediment, over time pressure formed sedimentary carbonate rocks
-Remains of living things became heated in the crust forming fossil fuels

Question 3

What is the approximate proportion of nitrogen in the atmosphere?

Answer 3

78%

Question 4

Name 4 consequences of rising levels of greenhouse gases:

Answer 4

-Sea levels will rise due to melting ice caps- could cause flooding and coastal erosion
-More frequent and severe storms
-Changes in temperature and rainfall- could lead to famine
-Wildlife and ecosystems put under threat

Question 5

Which pollutants are formed due to the high temperatures inside car engines?

Answer 5

Nitrogen oxides

Question 6

What process creates particulates?

Answer 6

Burning diesel