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WorksheetsExploring Food Chains and Webs
Total questions: 20
Worksheet time: 10mins
Which of the following is always a producer in a food chain?
Kangaroo
Eucalyptus tree
Dingo
Wedge-tailed eagle
What is the main role of consumers in a food chain?
Produce their own food
Break down dead material
Eat other organisms for energy
Absorb sunlight
Which group of organisms is responsible for breaking down dead plants and animals in an ecosystem?
Producers
Primary consumers
Decomposers
Secondary consumers
What is the main source of energy for most food webs on land?
The Moon
The Sun
The Wind
The Soil
In a simple food chain: grass → grasshopper → frog → snake, what trophic level does the frog occupy?
Producer
Primary consumer
Secondary consumer
Tertiary consumer
Which of the following best describes a food web?
A single line of energy flow
A network of interconnected food chains
Only producers and consumers
Only decomposers
What would most likely happen if all decomposers were removed from an ecosystem?
Plants would grow faster
Dead material would accumulate
More energy would be available
Food webs would not be affected
Which of the following is a primary consumer in an Australian grassland ecosystem?
Kangaroo
Wedge-tailed eagle
Dingo
Banksia tree
How much energy is typically passed from one trophic level to the next in a food chain?
100%
50%
10%
1%
Which of the following best explains why food chains rarely have more than five trophic levels?
There are not enough producers
Energy is lost at each level
Decomposers eat all the energy
Sunlight is not needed
What is the role of fungi in an ecosystem?
Producer
Primary consumer
Decomposer
Tertiary consumer
Which of the following is an example of a secondary consumer?
Grass
Rabbit
Snake
Mushroom
If a disease wipes out all the rabbits in a food web, what is a likely consequence?
More grass will grow
More foxes will appear
More snakes will survive
No effect on other animals
Which of the following statements about energy flow in food webs is correct?
Energy increases at higher trophic levels
Energy is recycled by decomposers
Energy decreases as it moves up trophic levels
Energy is not lost as heat
What is the main difference between a food chain and a food web?
Food chains are longer
Food webs show multiple feeding relationships
Food chains include decomposers
Food webs only show producers
Which of the following is NOT a producer?
Spinifex grass
Acacia tree
Koala
Algae
What would happen to a food web if all the top predators were removed?
Nothing would change
Prey populations would increase
Producers would disappear
Decomposers would stop working
Which of the following best describes a trophic level?
The amount of sunlight an organism receives
The position an organism occupies in a food chain
The number of producers in an ecosystem
The size of an organism
Which of the following is an example of a tertiary consumer in an Australian ecosystem?
Grass
Kangaroo
Dingo
Grasshopper
Why are decomposers important for the health of an ecosystem?
They produce food for all other organisms
They recycle nutrients back into the soil
They eat all the producers
They stop energy flow
