You have probably been studying the
water cycle since primary school.
Some snow is captured in glaciers or
polar icecaps for long periods, and some
water seeps underground into aquifers
(such as artesian basins).
Liquid water has a very large heat capacity-it takes
a large-amount of energy to heat water up and
change it's temperature.
Carbon cycle
The carbon cycle is a natural
process of circulation of carbon
between that atmosphere and
living organisms.
When living organisms die,
they are decomposer
organisms.
They use these sugars as fuel for their own
growth. Most other living things either eat
plants or eat animals that eat plants, so all
of our food is made possible by solar
energy.
By: Meriam Hammar
Fossil fuels
The carbon cycle is ongoing and enormous
amounts of carbon are emitted and absorbed by
the earth's forests-and even more by ocean
algae-each day.
Over time, heat and pressure has
transformed these remains into
fossil fuels-coal, gas and oil.
When fossil fuels are burned to power
transportation or generate electricity, this
ancient carbon dioxide is added to the
atmosphere.
Nitrogen cycle
Nitrogen is the most
common gas in air, forming
about 78% of the
atmosphere.
Nitrogen undergoes a cycle
that involves energy in a
number of ways.
The organisms that fix nitrogen get their 'fuel'
from plants that create energy through
photosynthesis, using energy from the Sun.
Phosphorus cycle
Unlike nitrogen,
carbon dioxide and
water, phosphorus is
not found in gas
form in the
atmosphere.
Rocks do not contain large
amounts of phosphorus does not
have enough nutrients to grow
many plants.
The phosphates
dissolve in water and
are taken up by
plants as nutrients.