Cycles in Nature

1
Cycles in Nature

• Chapter 13 Section 2 Notes

2
Earths Biosphere

• Earths biosphere contains a fixed amount of
  water, carbon, nitrogen, oxygen, and other
  materials that cycle through the environment and
  are reused by different organisms.

3
Water Cycle

• Water cycle how water moves from the Earths
  surface to the atmosphere and back to the surface
  again.
• Evaporation when liquid water changes into
  water vapor and enters the atmosphere.
• Condensation the process of changing water from
  a gas to a liquid.
• When water drops become large and heavy enough,
  they fall to the ground as rain or other
  precipitation.

4
Transpiration
Evaporation
5
Condensation
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Precipitation
7
Runoff
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The sun is warming the surface of the water.
When a cloud gets full it begins to rain. This is
called precipitation.
The water vapor cools down and forms clouds. This
is condensation.
This is called The Water Cycle
Water is a liquid.
As the water gets warmer it changes and begins
to evaporate.
The warm water changes into a gas called water
vapor and rises up.
Water Evaporation
10
The Water Cycle
Condensation
Precipitation
Evaporation
This keeps happening all the time.
11
Nitrogen Cycle

• Nitrogen Cycle the transfer of nitrogen from
  the atmosphere to the soil, to living organisms,
  and back to the atmosphere.

12
Nitrogen Cycle

• Nitrogen fixation a process in which some types
  of soil bacteria can form the nitrogen compounds
  that plants need.
• Farmers replace nitrogen in the soil by growing
  nitrogen-fixing crops or using fertilizers that
  contain nitrogen compounds that plants need for
  growth.

Nitrogen Cycle Video
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14
Carbon Cycle

• Carbon cycle how carbon molecules move between
  the living and nonliving world.

15
Carbon Cycle

• Producers remove carbon dioxide gas from the air
  during photosynthesis.

16
Carbon Cycle

• Respiration the chemical process that provides
  energy for cells.

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• Water Cycle Internet Interactive
• ?http//www.epa.gov/ogwdw000/kids/flash/flash_wate
  rcycle.html
• Nitrogen Cycle Internet Interactive
• ?http//www.classzone.com/books/ml_science_share/v
  is_sim/em05_pg20_nitrogen/em05_pg20_nitrogen.html
• Carbon Cycle Internet Interactive
• ?http//www.kscience.co.uk/animations/carbon_cycle
  .htm