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WorksheetsFood Chains, Energy Pyramids and Carbon Cycle
Total questions: 15
Worksheet time: 8mins
What role do you play in the food web?
Producer
Consumer
Decomposer
Human
How are primary consumers different from secondary consumers?
Primary consumers eat only plants; secondary consumers eat other consumers.
Primary consumers eat other consumers; secondary consumers eat only plants.
Primary consumers eat plants and other consumers; secondary consumers eat plants and decompose matter.
Primary consumers eat plants and decompose matter; secondary consumers eat plants and other consumers.
How might a lack of sunlight disrupt the food web?
It would cause consumers to consume less.
It would prevent decomposers from decomposing matter.
It would prevent producers from producing nutrients.
It would not disrupt the food web at all.
How is a food web different from a food chain?
Food webs contain only producers, not consumers.
Food webs do not include decomposers.
Food webs contain many different, linked food chains.
Food webs exist in aquatic environments; food chains exist in terrestrial environments.
This organism is most likely:
A primary consumer
A secondary consumer
A decomposer
A producer
In any ecosystem, there are always more:
Herbivores than carnivores
Predators than prey
Animals than plants
Heterotrophs than autotrophs
Virtually all plants are autotrophic. But there are no autotrophic animals or fungi. What can you infer about autotrophic organisms?
They can move around on their own.
They are at the top of the food chain.
They can make their own energy.
They reproduce slowly.
In most food chains, all of the energy originally comes from:
Plants
Dead matter that's been recycled by decomposers
Heat from deep within the Earth
The Sun
In a marine food chain, small fish eat plankton, big fish eat small fish, and sharks eat big fish. Which organism has the smallest population?
The plankton
The small fish
The big fish
The sharks
Which organisms do primary consumers mainly eat?
Producers
Secondary consumers
Predators
Decomposers
How do animals add carbon dioxide to the atmosphere?
Through breathing.
Through evaporation.
Through cellular respiration.
Through transpiration.
What organisms in the ocean absorb the most carbon dioxide?
Algae and marine plants
Ocean mammals, like whales and dolphins
Fish
Coral
What is a carbon sink?
Something that adds carbon to the atmosphere
Something that removes carbon from the atmosphere
Something that adds carbon to the earth's crust
Something that removes carbon from the earth's crust
How does carbon become locked inside the earth?
Tree roots expel carbon into the soil as they grow
Humans use machines to pump carbon dioxide into large underground tanks
Rocks become richer in carbon as time goes on
The carbon-rich bodies of plants and animals decay into the earth after they die
How is the carbon cycle similar to the water cycle?
Both involve liquid substances falling to Earth from the atmosphere.
Neither process works at low temperatures.
Both involve the transfer of substances between animals, plants, and the Earth.
Both involve the transfer of substances between the earth and outer space.
