NUTRIENT CYCLE
Answer these questions in brief-
1) What is the water cycle?
2) What factor decides the water is solid, liquid or gas?
3) What is the difference between evaporation and condensation?
4) Why do plants and other photosynthetic organisms need CO2 from the atmosphere?
5) How does carbon get stored in bodies of water such as oceans?
6) What is the greenhouse effect?
7) How much carbon is stored in the atmosphere as CO2?
8) Describe one of the many paths a carbon molecule can take through the carbon cycle.
9) How is nitrogen important in our lives?
10) Why are nitrogen-fixing bacteria contributions to the nitrogen cycle so important?
Fill in the blanks-
11) Nitrogen gas makes up
12) Nitrogen
converts
for organisms to use.
of the air we breathe.
13) Another useful form of nitrogen, NH4+ can be converted to
14) Plants use both
for organisms to use.
into DNA, protein, and other molecules.
15) The largest reservoir of phosphorus is in
16) Phosphorus is mainly stored in the
and
by
to incorporate nitrogen
rock.