section 3: cycling of matter - damm's science...
TRANSCRIPT
Essential nutrients are cycled through biogeochemical processes.
Section 3: Cycling of Matter
K
What I Know
W
What I Want to Find Out
L
What I Learned
Essential Questions
• How do nutrients move through biotic and abiotic parts of an ecosystem?
• Why are nutrients important to living organisms?
• What are the biogeochemical cycles of nutrients and how are they alike?
Cycling of MatterCopyright © McGraw-Hill Education
Review
• cycle
New
• matter
• nutrient
• biogeochemical cycle
• nitrogen fixation
• denitrification
Cycling of MatterCopyright © McGraw-Hill Education
Vocabulary
Cycles in the Biosphere• Natural processes cycle matter and nutrients through the biosphere.
• Matter is anything that takes up space and has mass.
• A nutrient is a chemical substance that an organism needs to obtain from
its environment in order to survive.
• The cycling of nutrients through the biosphere involves both living organisms
and physical processes.
• The exchange of matter through the biosphere is called the biogeochemical
cycle.
Cycling of MatterCopyright © McGraw-Hill Education
Cycles in the Biosphere
The Water Cycle
• Water evaporates from bodies of water, soil, and organisms.
• Water returns from the atmosphere in the form of precipitation.
• All living organisms rely on fresh water, which constitutes only ~3% of the
water on Earth.
Cycling of MatterCopyright © McGraw-Hill Education
The Water Cycle
Animation
FPO
Add link to concepts in motion animation from page 46 (Figure 17) here.
Cycling of MatterCopyright © McGraw-Hill Education
Water Cycle
BrainPOP
FPO
Add link to BrainPOP from page 46 here.
Cycling of MatterCopyright © McGraw-Hill Education
Cycles in the Biosphere
The carbon and oxygen cycles
• Carbon and oxygen often make up
molecules essential for life.
• Carbon and oxygen recycle
relatively quickly through living
organisms.
• Carbon and oxygen enter a long-
term cycle when dead material is
buried.
Cycling of MatterCopyright © McGraw-Hill Education
The Carbon Cycle
Animation
FPO
Add link to concepts in motion animation from page 47(Figure 18) here.
Cycling of MatterCopyright © McGraw-Hill Education
Cycles in the Biosphere
The nitrogen cycle
• The capture and conversion of
nitrogen into a form that is
useable by plants is called
nitrogen fixation.
• Nitrogen is fixed by bacteria, or
by electrical storms.
• Nitrogen returns to the
atmosphere through
denitrification – where bacteria
convert fixed nitrogen back into
nitrogen gas.
Cycling of MatterCopyright © McGraw-Hill Education
The Nitrogen Cycle
Animation
FPO
Add link to concepts in motion animation from page 48 (Figure 20) here.
Cycling of MatterCopyright © McGraw-Hill Education
Cycles in the Biosphere
The Phosphorus Cycle
• Phosphorus is essential for the growth and development of organisms.
• Phosphorus cycles quickly as phosphates through sediments, plants, and
consumers.
• Long-term, phosphorus is weathered or eroded from rocks and added to
the cycle.
Cycling of MatterCopyright © McGraw-Hill Education
The Phosphorus Cycle
Animation
FPO
Add link to concepts in motion animation from page 49 (Figure 21) here.
Cycling of MatterCopyright © McGraw-Hill Education
Cycling of MatterCopyright © McGraw-Hill Education
Review
Essential Questions
• How do nutrients move through biotic and abiotic parts of an ecosystem?
• Why are nutrients important to living organisms?
• What are the biogeochemical cycles of nutrients and how are they alike?
Vocabulary
• denitrification• matter
• nutrient
• biogeochemical cycle
• nitrogen fixation