Chapter 23.1-23.2 energy flow and cycles

Which of these best explains why predators need plants, such as grass, in their ecosystem?

• Plants are a large part of their diets
• Plants provide safety for predators
• Plants break down the organisms that the predators eat
• Plants provide food for their animals that the predators eat

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What is indicated by the diagram?

• Food web
• Food chain
• Food map
• Food menu

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What do the arrows indicate in a food web?

• What eats what
• Where the energy is being transferred
• How the animals are related

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What is the first source of energy for all food webs?

• Plants
• Sunlight
• Mineral in the soil
• Decomposers

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All living things are made of _______, and all living things need _______. 

• matter, plants
• energy, matter
• matter, energy

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Matter can by _____________ over and over again, and energy is needed for recycling matter. ___________ is not recycled, but it is converted from one form to another.

• destroyed,  matter
• recycled, energy
• destroyed, energy

What is a food chain?

• A chain that shows how heat passes from organism to organism.
• A way of showing how matter and energy pass from one organism to another.
• A representation of all the predator-prey relationships in a community.

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What type of organisms are the first step in a food chain?

• Consumers
• Predators
• Producers

What's a food web?

• A representation of all the feeding relationships within a community.
• A way of showing how matter and energy pass from one organism to another.
• A food chain provides a more complete model of feeding relationships within a community.

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What does an energy pyramid represent?

• Food pyramids show the different food chains in a community.
• Energy pyramids show the same total matter at all levels.
• Shows the amount of energy available at each feeding level in an ecosystem.

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