C1.1

Question 1

what is the main gases that make up the atmosphere?

Answer 1

78% nitrogen
21% oxygen
1% argon
Traces of water vapour

Question 2

What is the air a mixture of?

Answer 2

Different gases consisting of small molecules with large spaces between them

Question 3

what realeases gases or particulates into the atmosphere?

Answer 3

Human or natural processes such as volcanoes, which can affect air quality

Question 4

How was the earths early atmosphere formed?

Answer 4

Volcanic activity and consisted of co2 and water vapour

Question 5

what happened to water vapour in early atmosphere

Answer 5

Condensed to form oceans

Question 6

what happened when the evolution of photosynthesising occurred?

Answer 6

It added oxygen to atmosphere and removed co2

Question 7

How was co2 removed from atmosphere

Answer 7

By dissolving in oceans and forming sedimentary rocks and by formation of fossil fuels

Question 8

How has human activity has changed the composition of atmosphere?

Answer 8

By adding small amounts of CO, NO and SO2 to the atmosphere&
Extra co2 and small particles of solid to the atmosphere

Question 9

what pollutants are harmful to environment and which are harmful humans?

Answer 9

Human; CO reduces amount of oxygen that the blood can carry

Environment; sulfur dioxide causes acid rain