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WorksheetsCycles Review
Total questions: 25
Worksheet time: 13mins
Name
Class
Date
1.
What is the first step of the Carbon Cycle?
a)
Carbon dioxide is absorbed by producers.
b)
Carbon enters the atmosphere.
c)
The dead organisms are eaten by the decomposers.
d)
Animals eat plants passing carbon along the food chain.
2.
Carbon is a common component of ______________.
a)
Volcanic gases
b)
Limestone
c)
All organisms
d)
All of the above
3.
Photosynthesis is the process by which plants __________________________.
a)
Release Carbon Dioxide into the atmosphere.
b)
Turn Carbon Dioxide into sugar with the help of the radiant energy.
c)
Turn sugars into ene
4.
How does the concentration of Carbon Dioxide in the atmosphere affect climate?
a)
As Carbon Dioxide concentration increases, temperatures are more random.
b)
As Carbon Dioxide concentration increases, temperatures decrease.
c)
Carbon Dioxide concentration has no effect on climate.
d)
As Carbon Dioxide concentration increases, termperatures increase.
5.
Activities like fossil fuel burning and deforestation have affected the global carbon cycle.
a)
True
b)
False
6.
Which of the following does NOT add Carbon to the atmosphere?
a)
Respiration
b)
Weathering of limstone
c)
Volcanic eruptions
d)
Photosynthesis
7.
What is the equation for photosynthesis?
a)
H2O + 6HO2 -> 6O2 + 5C3
b)
6H2O + 6CO2 -> C6H12O6 + 6O2
c)
6H2O + C3PO -> R2D2 + C6H12O6
d)
6H2O -> C6H12)6 + 6O2
8.
_______________ removes Carbon Dioxide from the atmosphere.
a)
Respiration
b)
Evaporation
c)
Photosynthesis
d)
Burning of fossil fuels
9.
What is too much Carbon Dioxide responsible for?
a)
Respiration
b)
Greenhouse Effect
c)
Photosynthesis
d)
Deforestation
10.
The most significant negative effect humans have on the Nitrogen Cycle is __________________.
a)
breathing too much
b)
overuse of fertilizer
c)
contributing too much bacteria
d)
creating too much waste
11.
How can Nitrogen be "fixed" in the atmosphere?
a)
Photosynthesis
b)
Lightning
c)
Respiration
d)
Rain
12.
What type of organism(s) break down Nitrogen?
a)
Fungi and bacteria
b)
Fungi and plants
c)
Bacteria and herbivores
d)
Herbivores and carnivores
13.
When does Nitrogen enter a food web?
a)
It enters when an organism eats plants.
b)
It starts in the ocean.
c)
It starts when plants absorb it from the soil.
d)
It enters when photosynthesis occurs.
14.
How do animals get Nitrogen?
a)
They absorb it from the grass under their feet.
b)
They get it by eating plants and consumers.
c)
Animals are the main source of Nitrogen.
d)
They breathe it in.
15.
What happens to Nitrogen when an animal urinates?
a)
It evaporates into the air.
b)
Nothing happens.
c)
It turns into Carbon.
d)
It seeps into the soil and water.
16.
Nitrogen cannot be used by producers in which form?
a)
Nitrates
b)
Nitrites
c)
Ammonia
d)
Nitrogen gas
17.
Nitrogen gas goes back into the Earth to be used again.
a)
True
b)
False
18.
Where is Nitrogen most commonly found?
a)
Water
b)
Food
c)
Atmosphere
d)
Tables
19.
How can we help the Earth?
a)
Overfishing
b)
Excess use of fertilizer
c)
Littering
d)
Replanting trees
20.
How does fertilizer harm the ocean?
a)
It doesn't.
b)
It overwhelms the system with excess Nitrogen.
c)
It changes the molecule of Nitrogen.
d)
Pollution in the ocean.
21.
What is it called when water is heated in the ocean and turns into water vapor?
a)
Condensation
b)
Evaporation
c)
Precipitation
d)
Accumulation
22.
What is it called when water vapor is cooled and forms water droplets?
a)
Condensation
b)
Evaporation
c)
Precipitation
d)
Runoff
23.
Water droplets falling to the Earth is called ________________.
a)
Accumulation
b)
Condensation
c)
Precipitation
d)
Delta
24.
This powers the water cycle.
a)
Plants
b)
Animals
c)
Nitrogen
d)
The sun
25.
Most evaporation happens at night.
a)
True
b)
False
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