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WorksheetsBiogeochemical Cycles
Total questions: 27
Worksheet time: 20mins
Name
Class
Date
1.
The Process of absorbing usable nitrogen into plants for various uses like photosynthesis, DNA, and protein synthesis.
a)
Denitrification
b)
Nitrofication
c)
Nitrogen Fixing Bacteria
d)
Assimilation
2.
Organisms require nitrogen to make which of the following?
a)
glucose and starch
b)
lipids and nucleic acids
c)
proteins, chlorophyll, and nucleic acids
d)
carbohydrates and proteins
3.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
4.
How do plants get the nitrogen they need?
a)
from the air
b)
from the soil or water in which they live
c)
from the Sun
d)
from broken-down rocks
5.
Organisms that break down dead plants & animals and release nitrogen back into atmosphere...
a)
bacteria
b)
plants
c)
animals
d)
producers
6.
This gas makes up 21% of the atmosphere
a)
ozone
b)
oxygen
c)
nitrogen
d)
water vapor
7.
When humans burn fossil fuels, most of the carbon quickly enters the as carbon dioxide.
a)
Water
b)
Atmosphere
c)
Sun
d)
Air
8.
Which one of these does not add CO2 to the atmosphere?
a)
cooking with gas
b)
planting trees
c)
burning wood
d)
riding in a bus
9.
Combustion is another word for _______________.
a)
a train
b)
a bus
c)
a dog
d)
burning
10.
What does not produce carbon dioxide?
a)
Photosynthesis
b)
Burning Fossil Fuels
c)
Animal respiration
d)
Plants decaying
11.
During cellular respiration, carbon dioxide is
a)
a reactant in the conversion of glucose to CO2
b)
released to the atmosphere from the conversion of glucose
c)
absorbed by plants.
d)
depleted from the carbon sink.
12.
The major reservoir or “sink” for carbon is
a)
CO2 in the atmosphere
b)
Granite bedrock
c)
The deep ocean sediment and limestone rock made of calcium carbonate.
d)
Aerobic and anaerobic bacteria.
13.
Gas to Liquid; gas gets colder and changes back to liquid , forming clouds
a)
condensation
b)
evaporation
c)
precipitation
d)
transpiration
14.
Any form of water that falls from clouds and reaches Earth's surface like hail, snow, sleet, rain;clouds get heavy and the air cannot hold it any longer.
a)
precipitation
b)
transpiration
c)
condensation
d)
clouds
15.
causes evaporation
a)
shaking water
b)
rain
c)
Monster drinks
d)
energy from the Sun or heat
16.
The flow of water from land into a body of water.
a)
groundwater
b)
headwaters
c)
run-off
d)
infiltration
17.
Precipitation (rain, snow, ice) returns to Earth due to
a)
the force of gravity.
b)
interia.
c)
molecular bonding.
d)
the electromagnetic force
18.
What is it called when plants give off water vapor as a waste product?
a)
condensation
b)
evaporation
c)
sublimation
d)
transpiration
19.
When nitrogen gas is turned in to a form that plants and animals can use is called
a)
Combustion
b)
Photosynthesis
c)
Decomposition
d)
Nitrogen Fixation
20.
Which nutrient is not cycled through the atmosphere?
a)
carbon
b)
nitrogen
c)
phosphorous
d)
water
21.
What role do decomposers play in the phosphorous cycle?
a)
absorb phosphorous
b)
release phosphorous into atmosphere
c)
return phosphorous into the soil
d)
combustion
22.
This is released by the weathering of rocks.
a)
Carbon
b)
Oxygen
c)
Phosphorus
d)
Nitrogen
23.
Which of the following are carbon sinks in the ocean?
a)
Open Ocean
b)
Ocean surface
c)
Ocean seafloor
d)
Ocean Biota
e)
All of these are
24.
The release of carbon dioxide into the atmosphere causes which of the following?
a)
Temperature increases in the atmosphere
b)
Temperature decreases in the atmosphere
c)
Lowered levels of photosynthesis
d)
Nothing
25.
In the ocean, carbon can move through the food web and become part of shells as....
a)
Calcium Carbonate
b)
Carbonic acid
c)
Carbon dioxide
d)
Carbon monoxide
26.
Which is not a terrestrial carbon sink
a)
old growth forests
b)
Fossil fuels
c)
Limestone
d)
young forests
27.
How does carbon enter the ocean from the atmosphere
a)
As CO2 through photosynthesis
b)
From marine organisms for their shells
c)
It can dissolve directly into the ocean
d)
All are correct
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