WorksheetsBiogeochemical Cycles
Total questions: 20
Worksheet time: 14mins
Name
Class
Date
1.
Which is NOT a process of the water cycle?
a)
precipitation
b)
freezing
c)
transpiration
d)
evaporation
2.
The process of plants losing water through their leaves is called ____.
a)
condensation
b)
evaporation
c)
transpiration
d)
exhaling
3.
What is the most abundant gas in the atmosphere?
a)
hydrogen
b)
oxygen
c)
helium
d)
nitrogen
4.
Nitrogen that is not combined with other elements and found in the atmosphere as gas is _____.
a)
free nitrogen
b)
nitrogen compounds
c)
ammonia
d)
nitrates
5.
Where are denitrifying bacteria found?
a)
In the soil
b)
Root nodules
c)
In dead things
d)
In the atmosphere
6.
Where are nitrogen-fixing bacteria found?
a)
In the soil
b)
Root nodules
c)
In dead things
d)
In the atmosphere
7.
What happens during the process of nitrogen-fixation?
a)
Nitrogen compounds turn into free nitrogen
b)
Free nitrogen turns into nitrogen compounds
8.
What happens during the process of denitrification?
a)
Nitrogen compounds turn into free nitrogen
b)
Free nitrogen turns into nitrogen compounds
9.
What is the only process that removes carbon from the atmosphere?
a)
combustion
b)
cellular respiration
c)
photosynthesis
d)
decomposition
10.
What are examples of carbon sinks?
a)
ocean
b)
forest
c)
artificially made (man-made)
d)
clouds
11.
Which cycle are fossil fuels (oil, coal, natural gas) part of?
a)
carbon
b)
water
c)
nitrogen
d)
phosphorus
12.
Which cycle DOESN'T have an atmosphere component (part)?
a)
carbon
b)
nitrogen
c)
phosphorus
d)
water
13.
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
14.
Organisms that break down dead plants & animals and release nitrogen back into atmosphere...
a)
bacteria
b)
plants
c)
animals
d)
producers
15.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle
16.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle.
17.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle.
18.
Identify the cycle pictured.
a)
The Water cycle
b)
The Carbon cycle
c)
The Nitrogen cycle
d)
The Phosphorus cycle.
19.
Too much phosphorus in waterways (rivers, lakes) can lead to___________.
a)
eutrophication
b)
Nothing
c)
Death
d)
diseases
20.
This is released by the weathering of rocks.
a)
Carbon
b)
Oxygen
c)
Phosphorus
d)
Nitrogen
100 %
