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WorksheetsEcosystems: Food Chains and Cycles
Total questions: 10
Worksheet time: 7mins
Name
Class
Date
1.
When animals break down glucose to create energy, they release water and carbon dioxide (CO2.) How can carbon dioxide (CO2) be reused within the food web?
a)
It can be used by animals as a source of oxygen.
b)
It can be used by both plants and animals to produce energy.
c)
It can be used by plants during photosynthesis to create glucose.
2.
By which process is water taken from the ocean to form clouds?
a)
condensation
b)
evaporation
c)
transpiration
3.
Which best describes what happens when an owl attacks and kills a fish for food?
a)
an interconnection between aquatic and terrestrial food webs.
b)
an interconnection between terrestrial organisms and predators
c)
an interconnection between aquatic food webs and decomposers
4.
Which group in a food web is most likely to change atmospheric nitrogen into forms that are usable?
a)
consumers
b)
decomposers
c)
producers
d)
scavengers
5.
Which shows the correct flow of energy through this simple food chain?
a)
fox → grass → rabbit
b)
grass → fox → rabbit
c)
grass → rabbit → fox
d)
rabbit → grass → fox
6.
What is the energy source for the carbon dioxide cycle?
a)
plants
b)
the Sun
c)
respiration
7.
Which best explains the role of bacteria in an ecosystem?
a)
They break down organic matter into necessary nutrient components.
b)
They release energy from the decomposition of atmospheric gases.
c)
They convert carbon dioxide and water into simple carbohydrates.
d)
They absorb energy from the synthesis of inorganic compounds.
8.
Which molecule is necessary in order for respiration to occur in plants and animals?
a)
nitrogen
b)
oxygen
c)
sulfur
d)
water
9.
Which organisms recycle carbon in decaying matter back into atmospheric carbon dioxide?
a)
fish
b)
fungi
c)
plants
d)
mammals
10.
Which best describes the role plants serve in the oxygen cycle?
a)
They absorb oxygen during photosynthesis.
b)
They absorb oxygen during decomposition reactions.
c)
They release oxygen as a waste product of photosynthesis.
d)
They release oxygen as a waste product in cellular respiration.
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