Ecology: Population, Community and Food Chains

Where do all life forms get their energy?

• Earth's Core
• Water
• Plants
• The Sun

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What is a food chain?

• A long chain made of food 
• A list of ingredients used to cook food 
• How animals depend on plants and animals to survive

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Why might an organism have more than one arrow coming from them in a food web?

• More than one organism may eat them. 
• They may eat more than one other organism. 
• This organism gets its energy from multiple sources. 
• They have no resources available to them.

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An organism that lives by breaking down dead organic matter into simpler parts is a _______________________.

• scavenger
• consumer
• decomposer
• carnivore

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An energy pyramid represents what?

• How much sunlight is available for the ecosystem to use. 
• How much energy a particular organism needs. 
• How much energy is needed to build a pyramid. 
• The amount of energy available to the next 'feeder' in a food web.

How much energy is available to be passed on to the next level in an ecosystem?

• 100%
• 10%
• 50%
• 75%

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Earthworms help break down plant and animal remains and return the nutrients back into the soil. What are earthworms?

• consumers
• decomposers
• producers
• predators

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All of the living and nonliving things in an area that interact with each other are called a/an ______.

• community
• habitat
• population
• ecosystem

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A group of different species that live together and interact in an environment are called a/an ________.

• community
• habitat
• population
• ecosystem

If the population of prey increases, the population of predators will ________because of the availability of food.

• decrease
• stay the same
• increase

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