Earth Life Support Systems

The environmental lapse rate is

• 10 degrees celcius

• 8.5 degrees celcius

• 6.5 degrees celcius

• 4 degrees celcius

The global water cycle is a __________ system

How much Co2 is sequestered by the biological pump each year?

• 20 GT

• 30 GT

• 40 GT

• 50 GT

Carbon dioxide has increased from 280 ppm to ___________ since 1750

The end of the Wurm glacial period was 25 000 years ago when temperatures were how many degrees lower?

• 5

• 7

• 9

• 11

What is the name of the river in Southern England that's upper catchment is chalk where groundwater extraction exceeded recharge?

• Thames

• Severn

• Kenneth

• Kennet

Mature forest trees in the UK contain how much carbon per hectare?

• 170 -200 tonnes per ha

• 200 - 220 tonnes per ha

• 150-170 tonnes per ha

How much of the Brazilian Amazon rainforest are national parks or reserves where farming is banned?

• 25%

• 44%

• 50%

• 62%

Permafrost contains __________ GT of carbon

How much carbon in total (above and below ground) do rainforest trees store?

• 180 tonnes per ha

• 220 tonnes per ha

• 260 tonnes per ha

• 280 tonnes per ha