THE NITROGEN CYCLE
Section 4.3 p. 92
A/ VOCAB:
1. nucleotide
4. nitrogen cycle
7. nitrate
10. ammonium
SCIENCE 10
2. DNA/RNA
5. nitrification
8. denitrification
10. nitrate
NAME_________
DATE _________
3. amino acid
6. nitrogen fixation
9. ammonia
11. nitrite
B THE IMPORTANCE OF NITROGEN FOR LIVING THINGS:
- The element nitrogen, like carbon, is extremely important for all organisms
- Living things need nitrogen to do the following things:
1.
2.
C/ SOURCES OF NITROGEN:
- Just like carbon, nitrogen is very easy to find. So where is it found?
-
But, this gaseous nitrogen (N2) is not a usable form for living things because
Bohr Model
-
In order to be able to use nitrogen, it must be changed into a usable compound
form:
usable nitrogen compounds:
-
The process of changing gaseous nitrogen (N2) into a usable compound is called
_____________ ______________
-
Nitrogen fixation is one part of the nitrogen cycle
Define nitrogen cycle:
D/ THE NITROGEN CYCLE:
- nitrogen, just like carbon is cycled back and forth between the biotic and abiotic
parts of the biosphere in a series of steps:
STEP 1: Nitrogen Fixation:
Excess Ammonia
By:
STEP 2: Nitrification:
By:
STEP 3: Decomposition:
STEP 4: Denitrification:
ASSIGNMENT
Do page 95 CYU 4.3 – Numbers 1- 11, 13. 15, 17 in your notebook
Use complete sentences for 2, 3, 5, 8, 9, 10