Download Earth`s Natural Cycles

Earth’s Natural Cycles
Water (H2O) Cycle
Carbon Dioxide/Oxygen (CO2/O2) Cycle
Nitrogen Cycle
Water (H2O) Cycle
• Water cycle-the movement of water from Earth’s
surface into the atmosphere and back to the surface
again.
• Condensation
• Precipitation
• Evaporation
• Transpiration
Water -H20- Cycle
• is the movement of water in the environment
• 75% of the Earth’s surface is water.
•
•
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Most of the Earth’s fresh water is found in frozen polar ice caps and glaciers.
1% (of the 75%) is freshwater
All the water on Earth today is the same water that was here billions of years ago.
• Condensation-water vapor turns back into liquid water
in the process of condensation.
• Precipitation - any form of water (rain, sleet, snow,
etc…) that falls from the clouds
• Evaporation- process by which a liquid changes into a
gas.
•
Transpiration- The loss of moisture from the leaves of plants.
Carbon Dioxide/Oxygen (CO2/O2) Cycle
• Carbon Dioxide- An odorless gas in the air
which is made out of carbon and oxygen – CO2.
• Carbon dioxide is stored mostly in oceans (90% of
oxygen in the atmosphere comes from photosynthesis of
microscopic plantlike organisms in the ocean)
and the
atmosphere – it is found in bodies of dead
organisms and is a by-product of combustion.
• Carbon dioxide and oxygen stay in balance
through the process of photosynthesis and
respiration
• Green plants- take in carbon dioxide and release
oxygen
Carbon Dioxide/Oxygen Cycle
Oxygen
Sun
Plants
Rabbit
Carbon Dioxide
Hawk
Nitrogen Cycle
-- the cycle in which nitrogen gas is changed
into forms of nitrogen that plants can use .
-- 78% of the gas in the atmosphere is
Nitrogen
When we talk about the Nitrogen Cycle we
use words like….
….fungus (mushrooms), bacteria, decay
and decompose/decomposers, breaking
down animal waste and plant matter, once
living organisms, composting/compost
piles and bins
Nitrogen Cycle
Sun
Plants
Rabbit
Hawk
Decomposers
pictures from Google search