Greenhouse Effect

Question 1

First stage of the greenhouse effect

Answer 1

Short wave radiation (eg UV) passes through the atmosphere
This is good for life

Question 2

Second stage of greenhouse effect

Answer 2

30% is reflected back (long wave radiation eg infrared)

Question 3

Third stage of greenhouse effect

Answer 3

Thermal energy is trapped
Maintains temperature of the earth

Question 4

Fourth stage of the greenhouse effect

Answer 4

Increased green house gases means more absorption of thermal energy
~> more ‘global warming’

Question 5

What are the three greenhouse gases

Answer 5

Carbon dioxide (CO2)
Methane (CH4)
Water Vapour (H2O)

Question 6

How is carbon dioxide produced? Give two human activities that can increase production of it?

Answer 6

-burning fossil fuels
-combustion

-deforestation
-burning fossil fuels

Question 7

How is methane produced? Give two human activities that can increase production of it?

Answer 7

Decomposition of land fill & agricultural waste
Swamps & rice fields

Agriculture and farm animals (cattle farming)
Decomposition (increasing landfill sites)

Question 8

How is water vapour produced?

Answer 8

Water evaporating
Combustion

Question 9

The amount of ________ ______ in the earths atmosphere has risen in the recent past, largely due to the amount of ______ _____ now _____

Answer 9

Carbon dioxide
Fossil fuels
Burnt

Question 10

It is difficult to predict with complete certainty the effect on climate of ______ levels of _____ _____ on a _____ _____

Answer 10

Increased
Greenhouse gases
Global scale

Question 11

However, the vast majority of ____ ______ evidence agrees that ______ proportions of ________ _____ from ______ activities will increase average global ________

Answer 11

Peer reviewed
Increased
Greenhouse gases
Human
Temperatures