Agree
Disagree
Animals get carbon by eating plants.
1._______
________
2._______
Bacteria help plants absorb nitrogen from
________ soil.
3._______
Without humans, plants would run out of
________ oxygen.
4._______
Plants on land and in the oceans help
________ remove CO2 from the atmosphere.
Most of Earth’s atmosphere is nitrogen.
5._______
________
Chapter 14, section 3
Cycles of Matter
I. Elements Important for Life
A. Carbon – building block and
stores energy in food
B. Oxygen – used by cells to
function
C. Nitrogen – building block
II. Carbon Cycle
A. Steps
1. Plants use carbon from
CO2 to make sugars.
2. Animals take in carbon
from eating plants
3. Burning, respiration, and
decomposition release
carbon as CO2
http://www.youtube.com/watch?v=U3SZKJVKRxQ
III. Oxygen Cycle
A. Steps
1. oxygen (O2) released from
plants/algae
2. animals use O2 and release
CO2 to the atmosphere
3. plants separate O2 from
CO2
Red = ?
Blue = ?
http://www.youtube.com/watch?v=j4Ah1jercqQ
IV. Nitrogen Cycle
A. Steps
1. Consumers eat nitrogen (N)
from plants
2. Decomposition releases N
into the soil & air
3. N is brought back into
plants by bacteria living on
plant roots
http://www.classzone.com/books/ml_scienc
e_share/vis_sim/em05_pg20_nitrogen/em0
5_pg20_nitrogen.swf
http://www.youtube.com/watch?v=6GLIzlUD-zw
B. Nitrogen Fixation – bacteria
help plant roots absorb nitrogen.
Agree
Disagree
Animals get carbon by eating plants.
1._______
________
2._______
Bacteria help plants absorb nitrogen from
________ soil.
3._______
Without humans, plants would run out of
________ oxygen.
4._______
Plants on land and in the oceans help
________ remove CO2 from the atmosphere.
Most of Earth’s atmosphere is nitrogen.
5._______
________