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WorksheetsEnergy Flow: Food Chains & Food Webs
Total questions: 28
Worksheet time: 14mins
The diagram shows the flow of energy in a typical ecosystem.
Which box represents organisms with the greatest amount of energy flowing through them?
A
B
C
D
Which statement is not correct?
Anaerobic respiration releases less energy than aerobic respiration.
Energy flowing through biological systems is recycled.
Food chains show energy flow in ecosystems.
The sun is the principal source of energy input into biological systems.
Why is energy flow in biological systems described as non-cyclical ?
Energy always passes to larger organisms.
Energy cannot pass from living things to the environment.
Energy is lost as heat by living organisms.
The source of the energy is usually the Sun.
The diagram shows part of a food web.
Which organisms are producers, herbivores and carnivores?
Producer = trees
herbivores = moth caterpillars
carnivores = deer
Producer = hawks
herbivores = seed-eating birds
carnivores = grasses
Producer = grasses
herbivores = spiders
carnivores = beetles
Producer = trees
herbivores = beetles
carnivores = spiders
Which sequence describes the flow of energy in an ecosystem?
carnivore -> herbivore -> plant -> Sun
plant -> herbivore -> carnivore -> Sun
Sun -> carnivore -> herbivore -> plant
Sun -> plant -> herbivore -> carnivore
Which statement about food chains must be correct?
Producers are the final stage in a food chain.
There are more producers than consumers in a food chain.
There is only one type of herbivore in a food chain.
The third member of a food chain is a herbivore.
The diagram shows a food web in woodland.
In this food web a beetle is a
carnivore
decomposer
herbivore
producer
The diagram shows part of a food web.
How many herbivores are shown?
3
4
5
6
The diagram shows a food web.
What is the principal energy input?
carbohydrate
heat
light
oxygen
The diagram shows a food web in a freshwater pond.
Which of the organisms is a producer, a herbivore or a carnivore?
producer = 1
herbivore = 6
carnivore = 7
producer = 2
herbivore = 4
carnivore = 5
producer = 4
herbivore = 2
carnivore = 6
producer = 7
herbivore = 3
carnivore = 8
The diagram shows a food web from North America.
If the population of insects decreases, which other population will decrease the most?
badgers
lizards
sagebrush
squirrels
The diagram shows part of a food web.
Which organism is a producer?
A
B
C
D
The diagram shows a food web.
Which of the organisms shown in the food web can only survive by taking in simple inorganic materials?
beetles
fungus
owl
tree
The diagram represents nine organisms in a food web.
Which of the organisms is a producer and which is a carnivore?
producer = 1
carnivore = 4
producer = 2
carnivore = 6
producer = 9
carnivore = 1
producer = 9
carnivore = 8
Biologists link plants and animals in food chains and food webs according to the transfer of energy.
What is the principal source of this energy?
photosynthesis
plants
respiration
sun
The diagram shows losses from a rat to the environment.
What will not be returned to the ecosystem and recycled?
carbon dioxide
heat energy
salts
water
The diagram shows a food web on a wild fruit tree.
Which animals would be most affected, if the flowers of the tree were not pollinated?
aphids
bats
kestrels
squirels
Orangutans live in tropical rainforests and are herbivores.
Tigers eat orangutans.
What happens to these animals if some of the rainforest is destroyed?
The number of orangutans decreases and the number of tigers remains the same.
The number of tigers decreases and the number of orangutans remains the same.
The numbers of both orangutans and tigers decrease.
The numbers of both orangutans and tigers remain the same.
The diagram shows a food web from a freshwater pond.
Which organisms are herbivores and which are carnivores?
herbivores = small fish
carnivores = large fish
herbivores = tadpoles
carnivores = frogs
herbivores = water fleas
carnivores = insect larvae
herbivores = water plants
carnivores = water beetles
The diagram represents the energy flow through a food chain.
What provides the energy source (X) for this food chain?
decomposers
herbivores
plants
sunlight
The diagram shows energy flow in a food web.
Which number represents an organism that eats both plants and animals?
2
3
4
5
What happens to energy after it has flowed through a food chain?
It is lost as heat.
It is recycled.
It is stored as carbohydrate.
It is used to power metabolic processes.
Which is a possible sequence for energy flowing through a food web?
A
B
C
D
The diagram shows a food web.
Which levels represent carnivores?
P and Q
P and R
Q and R
R and S
The diagram represents the flow of substances within a balanced ecosystem.
The boxes are various trophic levels.
Which box represents herbivores?
A
B
C
D
The diagram shows part of the food web.
Which organism can properly be described by only one of the terms producer, consumer, herbivore and carnivore?
ant
dandelion
frog
stoat
What is the main source of energy for food webs?
chemical reactions
heat from the centre of the Earth
heat from the Sun
light from the Sun
The diagram shows an example of a woodland food web.
There are two different organisms at the first trophic level (producers).
How many different organisms are found at the third trophic level?
2
3
4
5
