Download Cycle notes

Water Cycle: movement of water
between the oceans, atmosphere,
land and living things
condensation
precipitation
runoff
evaporation
groundwater
Water Cycle Notes
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Evaporation – Sun’s energy causes water to change
from a liquid to a gas
Condensation – water cools and changes from a gas to
a liquid
Precipitation – Water that falls from the atmosphere as
rain, sleet, hail, snow
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Most precipitation falls into ocean
Runoff – precipitation that falls on land and flows into
streams, rivers, and lakes
Groundwater – precipitation that seeps into the ground
and is stored
Transpiration – process by which plants release water
vapor back into the atmosphere
Water cycle notes: continued
 Water
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is important because
Organisms are mainly composed of water
Water transports nutrients and wastes
Regulates temperatures
Slows down chemical reactions
Carries dissolved gases (CO2, O2)
Dissolves chemicals cells need
Carbon (carbon dioxide) and
oxygen cycle
Carbon (carbon dioxide) and
oxygen cycle notes
Organic molecules – molecules that contain
carbon
 Photosynthesis – basis of the carbon cycle
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Cellular Respiration
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Use carbon dioxide from air to make sugar
Release oxygen to atmosphere
Uses oxygen and releases carbon dioxide into the air
Photosynthesis and Cellular respiration recycle
oxygen and carbon dioxide
Carbon (carbon dioxide) and
oxygen cycle notes continued
 Decomposition
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Fungi and bacteria break substances into
simpler molecules and return carbon dioxide
and water back to environment
 Combustion
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Process of burning a substance
Releases carbon dioxide into the air
Nitrogen cycle
Nitrogen cycle notes
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Organisms cannot use nitrogen gas directly from
atmosphere
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In the process of Nitrogen Fixation, nitrogen fixing
bacteria take nitrogen gas and make compounds that
organisms can use
Legumes pass nitrogen into the food chain through
consumers
Nitrogen gets back into the atmosphere through
decay, bacteria, and wastes
Why is Nitrogen Important?
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Nitrogen makes up part of DNA and proteins