Science Ecosystems

Living things obtain matter from the environment and release it as

• Waste

• Air

• Oxygen

• Compote

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The arrows in the food chair point at what?

How are food webs related to food chains

• Food chains have food webs

• Food web have cousins

• Food webs consist of overlapping food chains

• Food chains make food webs

What do all food chains have in common?

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Why is the base of an energy pyramid larger than the top

• Al of the energy is at the bottom and loses energy at the top

• Energy is lost as heat at each level so this makes less energy at the top

• Heat increase and makes more energy

• Energy is lost

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What is a healthy ecosystem?

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The number of predator/prey must be ________ to be considered a healthy ecosystem?

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With fewer predators...the number of prey will _________

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The organisxm that is hunted and eaten is

• omnivore

• duck

• predator

• prey

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Weather can cause changes in the balance between predator and prey

• True

• False

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