Transcript Student Notes - Harrisonville Schools

NATURE UNBOUND
LESSON 7 – THE CYCLING OF
ELEMENTS THROUGH ECOSYSTEMS
Conservation
Mr. Dieckhoff
PRAIRIE FIRES….

Why do fires invigorate new prairie grasses to grow?
https://www.youtube.com/watch?v=CjAlIRl1vKU
ELEMENT CYCLING

Element Cycling –
4 SPHERES OF THE EARTH
1.
2.
3.
4.
Biosphere – all the living organisms on earth
Geosphere – all the rocks & minerals on land
Hydrosphere – all the water on the Earth
Atmosphere – all the gases making up the air
CYCLES – THE GEOLOGICAL CARBON
CYCLE


Carbon
flows
through
rock,
water, and
gases.
How does
this impact
Missouri’s
natural
resources?
CYCLES – THE BIOLOGICAL CARBON CYCLE


Carbon
flows
through
plants and
animals
How does
this impact
Missouri’s
natural
resources?
CYCLES – THE PHOSPHORUS CYCLE


Phosphorus
is stored in
rock and
weathered
by rain
How does
this impact
Missouri’s
natural
resources?
PHOSPHORUS CYCLE – THE ROLE OF
FUNGUS
In some soils, plants
cannot absorb
phosphorus
 Need mycorrhizae –

CYCLES – THE NITROGEN CYCLE
CYCLES – THE NITROGEN CYCLE
CYCLES – THE NITROGEN CYCLE
78% of air is nitrogen gas (N2) – few can use
 Nitrogen fixation – nitrogen gas changes into
ammonia (NH3)

Lightening, fire, volcanic eruptions
 Humans combine with hydrogen to make fertilizers
 Bacteria in soil work with legume plants (beans,
peas, clovers, etc….)

Other bacteria convert nitrogen to nitrates (NO3) through _________________
 Other bacteria convert nitrates into nitrogen gas
through ________________

CYCLES – THE WATER CYCLE


Water goes
through
evaporation,
transpiration,
condensation,
and
precipitation
Affects of
depleting
aquifers
and
increased
runoff
OGALLALA AQUIFER

https://www.youtube.com/watch?v=XXFsS94HF0
8
HUMAN EFFECTS ON CYCLES
Eutrophication –
 Greenhouse Gases –
 Lead shot used in dove season


https://www.youtube.com/watch?v=jBzIZUybdCA
CONCLUSION
1.
2.
3.
4.
5.
6.
Element Cycling
4 Spheres of the Earth
Carbon Cycles
Phosphorus Cycle
Nitrogen Cycle
Water Cycle