4.4

Question 1

What are greenhouse gases?

Answer 1

gases in the atmosphere that absorb long-wave radiation

Question 2

Greenhouse Gas and it’s source: Carbon Dioxide

Answer 2

cell respiration

combustion of fossil fuels

combustion of biomass

Question 3

Greenhouse gas and its source: Water Vapour

Answer 3

evaporation of the oceans

transpiration from plants

Question 4

Greenhouse gas and its source: Nitrous Oxide

Answer 4

vehicle exhaust

some agricultural processes

soil bacteria

Question 5

What percentage of the atmosphere do all of the greenhouse gases together make up?

Answer 5

1%

Question 6

What does the impact of a gas depend on?

Answer 6

It’s ability to absorb long-wave radiation as well as its concentration in the atmosphere

Question 7

Explain how an increase in the concentrations of greenhouses gases enhances the greenhouse effect

Answer 7

As the concentration of a greenhouse gas in the atmosphere increases more & more
long-wave radiation from the earth’s surface is absorbed & reemitted back towards the earth

Question 8

What are some of the possible consequences of an enhanced greenhouse effect?

Answer 8

changing rain and snow patterns
extreme weather conditions 
melting permafrost 
rising sea levels
droughts 
wildfires

Question 9

What is the general relationship between global CO2 levels and temperature?

Answer 9

There’s a correlation b/w CO2 concentration and temperature

they both follow the same pattern of fluctuations

When CO2 is high the global temp is warmer (& vice versa)