WorksheetsBiogeochemical Cycles
Total questions: 55
Worksheet time: 42mins
Name
Class
Date
1.
How does carbon dioxide leave the atmosphere?
a)
Through transpiration
b)
Through photosynthesis
c)
Through factory emission
d)
Sunlight
2.
What is one way that carbon enters the atmosphere?
a)
Sunlight
b)
Factory emissions
c)
Ocean uptake
d)
Rain
3.
When carbon combines with oxygen, what forms?
a)
Nitrogen
b)
Argon
c)
Carbon dioxide
d)
Sodium hydrogen
4.
Which process takes Carbon Dioxide from the air and converts it into a form of carbon used by living things?
a)
Precipitation
b)
Photosynthesis
c)
Respiration
d)
Bioremdiation
5.
Which process converts carbon in the form of sugar into carbon dioxide gas?
a)
Bioremediation
b)
Photosynthesis
c)
Respiration
d)
Transpiration
6.
These gases, such as carbon dioxide, trap heat in the Earth's atmosphere causing global warming
a)
Global warming gases
b)
Hot House gases
c)
Green House gases
d)
Thermal pollution
7.
In the food web, which organisms release the carbon from dead things back into the environment?
a)
Producers
b)
Consumers
c)
Scavengers
d)
Decomposers
8.
What is evaporation?
a)
a liquid changing to a gas
b)
animals breathing out condensation
c)
water vapor
d)
precipitation
9.
When a liquid becomes a gas
a)
transpiration
b)
condensation
c)
precipitation
d)
evaporation
10.
When a gas becomes a liquid
a)
precipitation
b)
evaporation
c)
advection
d)
condensation
11.
The energy that drives the water cycle comes from
a)
Solar Radiation
b)
Geothermal Heat
c)
Water Energy
d)
Advection
12.
All living things are made of carbon.
a)
true
b)
False
13.
Respiration is the process by which ____________ is consumed and _______________ is produced.
a)
Carbon,Oxygen
b)
Oxygen,Carbon dioxide
c)
H20, oxygen
d)
Carbon, H2O
14.
Which substance must be chemically transformed before it can be used by plants?
a)
carbon dioxide gas
b)
water vapor
c)
nitrogen gas
d)
groundwater
15.
Converting atmospheric nitrogen into a usable form by bacteria or lightning is known as _______.
a)
nitrogen fixation
b)
denitrification
c)
ammonification
d)
assimilation
16.
Most of the nitrogen in our world is in an unusable form.
a)
true
b)
false
17.
The nitrogen found in the atmosphere is not in a form that plants or animals can use. What converts it into a usable form?
a)
Bacteria
b)
Photosynthesis
c)
Decomposition of organisms
d)
Fungi
18.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
This is not a correct diagram of any cycle.
19.
Nitrogen in the atmosphere is not available. Free nitrogen has to be changed into a usable form in a process called __
a)
nitrogen fixation
b)
transpiration
c)
precipitation
d)
respiration
20.
The process by which water, wind, ice, and changes in temperature break down rock into fragments called sediments.
a)
Deposition
b)
Erosion
c)
Weathering
d)
Igneous Rock
21.
The main difference between the water cycle and all the other biogeochemical cycles is that water_______.
a)
creates completely new substances
b)
is made from matter that has been here since the world was formed
c)
never changes its structural form
d)
is much slower than the other cycles
22.
Growing legumes such as alfalfa or soy beans increases
a)
denitrification
b)
nitrogen fixation
c)
ammonification
d)
ammonium oxidation
23.
Organisms use nitrogen to form
a)
carbohydrates and lipids
b)
proteins and lipids
c)
lipids and nucleic acids
d)
proteins and nucleic acids
24.
Organisms that do not decompose can be buried and become what?
a)
water
b)
nutrients
c)
air
d)
fossil fuels
25.
Where do animals get nitrogen from?
a)
soil
b)
air
c)
water
d)
plants
26.
How are humans negatively affecting the nitrogen cycle?
a)
Humans plant excessive nitrogen consuming plants
b)
riding bicycles made of nitrogen based products
c)
eating foods which contain high amounts of nitrogen
d)
burning coal which releases nitrogen into the atmosphere and causes acid rain
27.
Which of the following statements about the nitrogen cycle is false?
a)
nitrogen can be used from the air
b)
nitrogen can be fixed by lightning or bacteria
c)
nitrogen is used to make proteins in the human body
d)
nitrogen can be released back into the air or the ground after an organism dies
28.
Why do heterotrophs need nitrogen?
a)
making amino acids and nucleic acids
b)
for cellular respiration
c)
for photosynthesis
d)
for the burning of fossil fules
29.
This is released by the weathering of rocks.
a)
Carbon
b)
Oxygen
c)
Phosphorus
d)
Nitrogen
30.
Matter cannot be created.
a)
True
b)
False
31.
What cycles through the environment in the hydrologic cycle?
a)
Carbon
b)
Nitrogen
c)
Hydrogen and Oxygen
d)
Sunlight
32.
What does this formula represent?
CO2 +H2O >>sunlight>>C6H12O6 + O2
CO2 +H2O >>sunlight>>C6H12O6 + O2
a)
Cellular Respiration
b)
Photosynthesis
c)
Ecological Chemical Pathways
d)
Chemosynthesis
33.
Where is a lot of the CO2 located on earth?
a)
space
b)
absorbed in the ground
c)
in the atmosphere acting as a greenhouse gas
d)
in plants
34.
What is an example of a legume?
a)
strawberries
b)
carrots
c)
peanuts
d)
corn
35.
How much of the atmosphere is composed of nitrogen gas?
a)
87%
b)
38%
c)
78%
d)
21%
36.
What can excess amounts of nitrogen cause in ecosystems?
a)
Disrupts the equilibrium of ecosystem, causing number of species to decline
b)
Leads to improvement of an ecosystem due to healthy plant growth
c)
Leads to high oxygen content in aquatic ecosystems
d)
Increases the speed of decomposition of plants and animals
37.
What is evapotranspiration?
a)
I have no idea
b)
Transpiration and Evaporation combined
c)
Condensation
d)
The process of water evaporating
38.
How nitrogen is "fixed" into useable form for plants...
a)
through action of bacteria only
b)
through lightning only
c)
through action of bacteria & lightning
d)
through photosynthesis
39.
Which nutrient is not cycled through the atmosphere?
a)
carbon
b)
nitrogen
c)
phosphorous
d)
water
40.
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
41.
This is released by the weathering of rocks.
a)
Carbon
b)
Oxygen
c)
Phosphorus
d)
Nitrogen
42.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle.
43.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle
44.
What do plants do with the carbon they absorb?
a)
Make carbohydrates in the form of sugars.
b)
Use it in evapotranspiration.
c)
Make amino acids that become proteins.
d)
Make cell membranes.
45.
As nutrients cycle through an ecosystem, inorganic compounds are broken down and returned to autotrophs by
a)
primary producers.
b)
primary consumers.
c)
detritovores.
d)
the process of photosynthesis
46.
Which of the following statements is true of the phosphorus cycle?
a)
Phosphorus enters the atmosphere as phosphates.
b)
The phosphorus cycle utilizes the processes of erosion, and weathering.
c)
Phosphates are used in carbohydrate and glucose storage.
d)
The phosphorus cycle utilizes bacteria to breakdown phosphates and make them available for plants.
47.
This process is responsible for most environmental problems of excess nitrogen and phosphorus entering streams, lakes and oceans.
a)
decomposition
b)
emissions from automobiles
c)
agriculture and house hold runoff
d)
photosynthesis
48.
Which abiotic factor most influences the water cycle?
a)
air
b)
sun
c)
soil
d)
wind
49.
Which term best describes how plants release water in the form of water vapor?
a)
evaporation
b)
precipitation
c)
transpiration
d)
condensation
50.
A student gets a can of soda from the refrigerator. There is a thin film of moisture on the surface of the can. Which best describes the source of the moisture?
a)
Water from the air condensed on the can
b)
Water from the can evaporated into the air
c)
Melted ice from the refrigerator forms on the can
d)
Ice from the refrigerator becomes frozen on the can
51.
Which term best describes the flow of water over land?
a)
runoff
b)
precipitation
c)
transpiration
d)
condensation
52.
Which two processes increase the amount of water vapor in the atmosphere as a result of heat from the sun?
a)
surface run-off and transpiration
b)
condensation and precipitation
c)
evaporation and condensation
d)
transpiration and evaporation
53.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle
54.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle
55.
How do animals get nitrogen?
a)
the atmosphere
b)
eating other organisms
c)
bacteria
d)
lightning
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