Ecosystems Changing

When you cut down a tree, organisms that relied on it for everything from food to shade must _____________________

• build another tree

• find somewhere else to live or other food

• go to the zoo

• starve or die

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What are some ways ecosystems can change?

• forest fires

• spraying pesticides

• deforestation

• all of the above

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A dam was built on the Colorado river and blocked the migration of fish. The fish population will likely...

• Stay the same

• Decrease

• Increase

• Increase then decrease

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which is a population?

• The coyotes in the Back Bay

• All the organisms in Costa Mesa

• A single squirrel

• All organisms on earth

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NGSS.MS-LS4-4

Which word means "a group of animals, plants or other living things that all share common characteristics and that are all classified as alike in some manner"?

• species

• beneficial

• detrimental

• organism

Which word means "moving from one region or habitat to another, especially regularly according to the seasons"?

• migration

• abiotic

• impact

• ecosystem

Which is a HARMFUL change that plants can make to their ecosystem?

• They put oxygen in the atmosphere.

• They can grow over other plants and steal their space and nutrients.

• Their roots keep the ground stable and prevents erosion.

• They provide shelter for many animals.

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NGSS.MS-LS2-4

Which experiences the least change over time?

• Pioneer Species

• Primary Succession

• Aquatic Succession

• Climax Community

Breaking News! A new island has formed off of Hawaii! What must occur for it to become an ecosystem?

• Secondary Succession

• Aquatic succession

• Primary Succession

• Ferns must grow

Which best describes eutriphication?

• pond slowly filling with sediment over time; becoming a forest

• growth of an ecosystem following a disturbance

• forest burning down

• humans causing succession

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NGSS.MS-LS2-3

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