Exploring Food Chains and Webs

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