Transcript 4-4 Cycles of Matter

4-4 Cycles of Matter


4 main elements of
body
Oxygen: 65%
Carbon: 18.5%
Hydrogen: 9.5%
Nitrogen: 3.5%
These 4 elements
make up 96.5% of the
body

3 main elements of
Earth’s atmosphere
*Nitrogen: 78%
*Oxygen: 21%
*Carbon: minimal
Cycles
 Elements
move in an
ecosystem in
cycles.
There are 3
cycles.
1.Water cycle
2.Carbon
cycle
3. Nitrogen
cycle
1. Water Cycle
*Moves between ocean,
atmosphere and land
*Enters atmosphere through
evaporation
*Evaporation is movement of
water into atmosphere as it
changes from liquid to gas
*From bodies of water and moist
areas of land
*Also travels through
transpiration which is
evaporation of water from
leaves of plants
Complete Water Cycle
a.Water evaporates from oceans, streams,
surface water and plants and enters
atmosphere as water vapor.
b.Water vapor forms clouds
c.Clouds return water to oceans and lands
by precipitation (snow, sleet, hail and rain)
d.Cycle continues with the energy of the
sun
2. Carbon Cycle
*Plants use CO2 and
sunlight to make
sugars and starches
during
photosynthesis.
*The biological
reactions in
organisms are the
main part of the
carbon cycle.
3 Main Sources of Carbon
a.Carbon in living organisms
b.CO2 dissolved in ocean. This is
in large amounts
c.Carbon in rocks: coal, oil and
limestone.
3. Nitrogen Cycle
 Important to living things
to make proteins (amino
acids).
 Living organisms cannot
use nitrogen as a gas,
they need to have it as a
different form.
 Nitrogen-fixing bacteria
produce ammonia (NH2)
which is the form of
nitrogen that plants can
use. These live in soil and
in roots of legumes.

Legumes are plants
such as peanuts,
beans and clover that
have colonies of
nitrogen-fixing
bacteria in nodules on
their roots.
Complete Nitrogen Cycle
1.Nitrogen –fixing bacteria
convert nitrogen in
atmosphere to a form that
plants can use
2.Plants use this form of
nitrogen to form proteins
3.Animals consume these
plants to get proteins
4.Decomposers return
nitrogen to the
environment
5. cycle continues