matter cycles

1. 3/25/14
Bell work:
How do we (all animals)
get nitrogen in the
nitrogen cycle?
Announcements:
• Ch. 18.1 & 18.2 Quiz – Thurs., 3/27
• Extra Credit due Thurs., 3/27
• Fieldtrips: 3/26 Selby, 4/17 Myakka, 4/30 Mote
Objectives:
Students will explore the
water cycle, carbon
cycle, nitrogen cycle,
and oxygen cycle.
#40

2. Ch. 18.2 Cycles of Matter

3. Water Cycle

4. What is the driving force (energy
source) for the water cycle?
a. b. c. d.
0 000
a. The ocean
b. Winds
c. Humans
d. The sun
45

5. What process releases water from the
leaves of plants?
Evaporation
Transpiration
Condensation
Precipitation
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45
a. Evaporation
b. Transpiration
c. Condensation
d. Precipitation

6. • Just as water moves continuously through
ecosystems, other types of matter do too.
• Cycles are everywhere in nature – materials
needed by organisms are constantly recycled
• Law of Conservation of Mass: matter cannot
be created nor destroyed, it only changes
form (chemical reactions, physical changes,
etc.)

7. 4 types of matter that are
cycle through ecosystems:
Water
Carbon
Nitrogen
Oxygen

8. Nitrogen Cycle

9. Manure &
Compost are
used as
fertilizers to
increase plant
growth

10. Nitrogen cycle
• We can’t use the Nitrogen (N2) that we
breathe – it has to be changed through
nitrogen fixation

11. Which process converts atmospheric
nitrogen to a form organisms can use?
Nitrogen
Absor...
Nitrogen
Fixat...
Nitrogen
Reten...
Nitrogen
Stabi...
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45
a. Nitrogen Absorption
b. Nitrogen Fixation
c. Nitrogen Retention
d. Nitrogen Stabilization

12. How are nitrogen compounds in
organisms returned to the soil?
Decom
position
...
Exhalation
(b...
Cellularrespi...
Nitrogen
fixat...
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45
a. Decomposition
(breaking down of
dead tissue)
b. Exhalation
(breathing out)
c. Cellular respiration
d. Nitrogen fixation

13. The main reason for adding manure to
a garden is to increase…
Carbon
Nitrogen
Oxygen
W
ater
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45
a. Carbon
b. Nitrogen
c. Oxygen
d. Water

14. Why do organisms need Nitrogen?
To
release
ene...
An
essentialp...
Im
portantlife...
To
createener...
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45
a. To release energy
b. An essential part of
proteins & DNA
c. Important life
processes such as
growing and
reproducing
d. To create energy
rich sugars

15. Oxygen Cycle

16. Oxygen Cycle
• Algae (phytoplankton, protists) release more
than 50% of O2 in Earth’s atmosphere

17. During which process is oxygen gas
released into the atmosphere?
Chem
osynthesis
Decom
position
Photosynthesis
Transpiration
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45
a. Chemosynthesis
b. Decomposition
c. Photosynthesis
d. Transpiration

18. What do animals release back into the
atmosphere?
Oxygen
Nitrogen
Carbon
dioxide
Argon
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45
a. Oxygen
b. Nitrogen
c. Carbon dioxide
d. Argon

19. Carbon Cycle

20. Carbon Cycle

21. During the carbon cycle, ____ take in
carbon dioxide from the atmosphere.
Anim
als
Consum
ers
Decom
posers
Plants
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45
a. Animals
b. Consumers
c. Decomposers
d. Plants