Pages in this set

Page 1

Preview of page 1
6.1 _ The Carbon Cycle

What causes a reduction in CO2?
Plants using CO
2 for photosynthesis

Oceans absorb it

What causes an increase in CO2?

Respiration of plants and animals
Decay/Death release CO 2 into soil
Combustion of fossil fuels

Page 2

Preview of page 2
6.2 The Greenhouse effect and Global Warming

The Greenhouse effect
Short wave radiation enters Earth's atmosphere
Some is reflected back into space
However due to the cloud of greenhouse gases , a lot of the radiation
can't get out and is therefore trapped
The trapped radiation consequently heats up the…

Page 3

Preview of page 3
-Obtain carbohydrates from the plant
and the plants acquires amino acids
from the bacteria

Nitrogen compounds from dead organisms are turned into ammonium
These compounds include: urea, proteins, nucleic acids and vitamins
Saprobiotic microorganisms , mainly fungi and bacteria , feed on these
materials, releasing ammonia , which…

Page 4

Preview of page 4
The process is which nitrates in the soil are converted to nitrogen gas
by denitrifying bacteria
They use nitrates in the soil to carry out respiration and produce
nitrogen gas
This happens under anaerobic conditions , in waterlogged soils

6.4 Use of Natural and Artificial Fertilisers

Fertilisers are used to…

Page 5

Preview of page 5
6.5 Environmental Consequences of using Nitrogen

Effects of Nitrogen Fertilisers
Reduced Species Diversity - nitrogen rich soils favour the growth of
grasses and other rapidly growing species, which out compete other
species that eventually die out
Leaching - may lead to pollution of watercourses
Eutrophication - cause by leaching…


No comments have yet been made

Similar Biology resources:

See all Biology resources »