CLASS SET!!
Dissolved Gases & Nutrient Cycles
Test
CLASS SET!!
1) Photosynthesis only occurs in the ___ .
a. Twilight Zone
b. Sunlit or Euphotic zone
c. Coral reefs
d. Kelp Forests
2) In coastal waters, the euphotic zone extends
a. 150 – 200 meters
b. 15 – 50 meters
c. 15 – 20 meters
d. 100 – 300 meters
3) How many metric tons of CO2 does the ocean uptake annually?
a. 2-3 billion
c. 8 billion
b. 2-3 million
d. 6 million
4) 12 ppm is
a. The Saturation concentration at high altitudes
b. The saturation concentration at low latitudes
c. The saturation concentration at sea level
d. The saturation concentration below sea level
5) What is the nitrogen cycle?
a. The biogeochemical processes that move Nitrogen around the planet
b. Humans breathing in Nitrogen and exhaling it as carbon dioxide
c. Plants breathing in nitrogen and using it to produce oxygen
6) The inorganic nitrogen taken in by soil bacteria and converted to a form (ammonium) organic
organisms can use is called
a. Mineralization
c. Fixation
b. Uptake
d. Denitrification
7) The depth where the rate of photosynthesis equals the rate of respiration is called the
a. Saturation depth
b. Compensation Depth
8) The three environmental factors that affect microbial activity are
a. Temperature, moisture, and salinity
b. Temperature, resource availiability, and salinity
c. Moisture, temperature, and resource availability
d. Moisture, salinity, temperature
9) Mechanical motion (stirring) and increasing temperature affects the solubility of
a. Gases
c. Plasma
b. Solids
CLASS SET!!
Dissolved Gases & Nutrient Cycles
Test
CLASS SET!!
10) At sea level, 12 ppm is the most oxygen that can be dissolved. This is called the
a. Saturation Concentration
b. Compensation Concentration
11) Plants take in CO2, water and sunlight to make sugar and water in the process called
a. Respiration
c. Procreation
b. Photosynthesis
12) More gas will be dissolved if
a. Temperature increases
13) Less gas will be dissolved if
a. Pressure and salinity decrease
b. Pressure and salinity increase
c. Pressure increases and salinity
decreases
b. Temperature decreases
d. Pressure decreases and salinity
increases
14) More gas will be dissolved if
a. Temperature and Salinity
decrease
b. Temperature and Pressure
increase
c. Salinity and Pressure increase
d. Temperature and Pressure
decrease
15) All organisms need nitrogen to ___ & ___
a. Live and breath
b. Breath and grow
c. Live and grow
16) When organisms die and decompose, the nitrogen in their cells in released back into the cycle
during the process of
a. Nitrification
c. Uptake
b. Mineralization
d. Denitrification
17) Plants and animals can only use nitrogen in which of the following forms?
a. Ammonium
c. A only
b. Nitrate
d. Both A & B
18) Which of the following are factors that affect the solubility of gases?
a. pH & salinity
c. pH and temperature
b. Temperature & salinity
d. None of the above
CLASS SET!!
Dissolved Gases & Nutrient Cycles
Test
19) The lighted portion of the ocean is also called the _____
a. Euphrenic Zone
b. Eukaryote Zone
CLASS SET!!
c. Euphotic Zone
d. None of the above
20) Nitrogen is converted to inorganic nitrogen, taken out of the ecosystem and returned to the
atmosphere during the process of
a. Mineralization
c. Uptake
b. Denitrification
d. Fixation
21) The unit for measuring DO due to the small amount of oxygen compared to the weight of H2O is
a. ppb
c. mg/l
b. ppm
d. Both b & C
22) Which of the following processes influence the CO2 intake of the ocean?
a. Respiration & monsoon season
c. Diffusion & aeration of the
b. Photosynthesis & respiration
water
d. Diffusion & osmosis
23) The Euphotic Zone extends about ___ - ___ meters in the open ocean.
a. 15 – 20
b. 150 – 160
c.
24) The coastal E.Z. is shallower due to
a. The amount of suspended sediment from the land
b. The amount of wave action at the beaches
c. The amount of animals living off the coasts
d. The continental margin being high closer to land
25) Above the compensation depth, the level of ___ is higher than the level of ___.
a. Carbon dioxide, oxygen
c. Nitrogen, oxygen
b. Oxygen, carbon dioxide
d. Carbon dioxide, nitric oxide
26) Below the compensation depth, the level of ___ is higher than the level of ___.
a. Carbon dioxide, oxygen
c. Nitrogen, oxygen
b. Oxygen, carbon dioxide
d. Carbon dioxide, nitric oxide