Download Worksheet for videos below.

Use with Bozeman Science Video : Biogeochemical Cycling – 10:06 min
Bozeman Science Video: Ecosystems – 14:05 min
Unit 7 – Ecology
Biogeochemical Cycling:
A.
B.
C.
D.
E.
F.
G.
H.
I.
J.
K.
L.
How many electrons does carbon have for bonding? _________________________
Why do we need Carbon? ____________________________
Hydrogen is found in water but is needed during __________________transfer.
Amino Acids contain ___________________ to build proteins.
Oxygen is needed for cellular _______________________
Phosphorus is important in the fatty acid bilayer, in the DNA ______________ and in
___________, the molecule of energy.
Sulfur gives _________________ to the large protein macromolecules.
Where is most of the Water stored on our planet? ________________________
Where is most of the Carbon stored on our planet? ________________________
Photosynthesis and _______________________ cycles the Carbon Dioxide on our planet.
What type of matter is needed to “fix” the nitrogen and “return” the nitrogen to the
atmosphere? ___________
Phosphorus is stored in the _________________ on the planet.
Ecosystems:
1. Write down the level of ecosystem organization from largest to smallest
B
B
E
C
O
2. Living things are consider __________________ factors in an ecosystem
3. Nonliving things are considered __________________ factors in an ecosystem.
4. Producers must perform what process in an ecosystem? ___________________________
Use with Bozeman Science Video : Biogeochemical Cycling – 10:06 min
Bozeman Science Video: Ecosystems – 14:05 min
5. Primary productivity measures the amount of _______________ that is produced in an area
over time.
6. Eating levels are called _______________ levels.
7. Complete the trophic level diagram below
8. Food chains go in ______ direction but food webs show all ________________ between food
chains.
9. An ecosystem’s carrying capacity is a result of its ___________________ factors.
10. Species populations can be affected by predator/prey relationships, _________________ and
____________ impacts.
11. Typically, what will happen to the prey population in a food chain if the predator population
increases? _________________
12. Typically, what will happen to the predator population in a food chain if the prey population
increases? _________________
Use with Bozeman Science Video : Biogeochemical Cycling – 10:06 min
Bozeman Science Video: Ecosystems – 14:05 min
After watching the videos, complete the following questions.
1. Where would a producer be found on a food chain?
a. The top
b. The bottom
c. The middle
d. They would not be found on one.
2. Which of the following would NOT be an abiotic factor?
a. Amount of sunlight
b. Soil bactieria
c. Wind
d. Temperature
3. A fox chases, attacks and kills a rabbit. What type of relationship would this be?
a. Competition
b. Predation
c. Symbiosis
d. Limiting factor
4. Anything that would determine the population size, existence, or distribution of one organism
or a whole population would be called a_____
a. Eutrophic event
b. Pollutant
c. Stunting nutrient factor
d. Limiting factor
5. Two foxes try to kill the same rabbit. What type of relationship would this be?
a. Competition
b. Predation
c. Symbiosis
d. Parasitism
6. An important element in carrying genetic information is ____
a. Carbon
b. Hydrogen
c. Sulfur
d. Nitrogen
Use with Bozeman Science Video : Biogeochemical Cycling – 10:06 min
Bozeman Science Video: Ecosystems – 14:05 min
7. Humans must get their nutrients through _____ where plants get it through _______.
a. Cellular respiration, Photosynthesis
b. Food, Soil
c. Breathing, Growing
d. Biotic factors, abiotic factors
8. The difference between environmental science and ecology is that environmental science
includes the _________ factor while ecology does not.
a. Bacteria
b. Carrying
c. Human
d. Limiting
9. The relationships between food chains are called ______.
a. Food Webs
b. Adaptations
c. Carrying Capacity
d. Limiting Factors
10. Which of the following is NOT an abiotic factor in an ecosystem?
a. Soil
b. Air
c. Water
d. Light