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Why is there a limited amount of energy that can be passed on to the next feeding level?

• There is never enough sunlight available. 
• Some ecosystems have limited resources. 
• Organisms use some of the energy they get from eating.
• All the energy is available to be passed on. 

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Which of the following is NOT an example of a decomposer

• fungi
• hawk
• bacteria
• insects

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What are some examples of decomposers?

• earth worms, fungi, bacteria
• beetles, vultures 
• algae, phytoplankton

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What would happen if their were no producers?

• Every population would grow larger

• Everything would die out

• The animals would make their own food

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Which organism assists in the breakdown of dead matter?

• beetles

• ants

• worms

• all of these

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a system of food chains that shows the transfer of energy  is termed

• food web
• food chain
• prey
• predator

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What is it called when plants release water vapor through their leaves?

• sublimation

• respiration

• transpiration

• precipitation

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Some beetles break down the remains of dead animals. Some mushrooms break down the remains of dead trees. How do these actions most benefit plants?

• By returning nutrients to the soil

• By releasing oxygen into the air

• By making space for new animals

• By decreasing the population of herbivores

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What are plants called in a food chain?

• Producers
• Consumers
• Decomposers
• Scavengers

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According to this diagram, plants absorb

• nitrates

• nitrogen fixing bacteria

• animals

• decomposers

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