Ecosystem Test Prep Part 1

What is the difference between an estuary and a pond ?

• Ponds have saltwater and estuaries have freshwater

• Ponds flow to the Pacific and Indian ocean and estuaries flow to the sea.

• Ponds are large and estuaries are big

• Ponds have freshwater and estuaries contain brakish water

Which two ecosystems would you find a horsesnake, deer, or rabbit ?

• forest and ocean

• grassland and forest

• estuary and ocean

What is the main difference between a grassland and a forest ecosystem?

What ecosystems provide homes for terrestrial organisms ?

An ecosystem is a community of organisms interacting with their physical environment. Why are decomposers an important part of ecosystems?

• The stop major storms and weather conditions from taking place.

• They provide all of the energy to consumers.

• They break down dead organisms and give nutrients to the soil.

• The produce their own food so that they can survive.

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Give an example of a situation that would cause a decrease in predator populations ?

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What will most likely happen if the sea urchin population decreases ?

• The kelp and sea otter populations will increase.

• The kelp and sea otter populations will decrease.

• The kelp population will increase, and the sea otter population will increase.

• The kelp population will increase, and the sea otter population will decrease.

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Mr.Maghran caught a blue crab while he was at the beach with his family. He wanted to take it home and place it in his pond, but was told the crab would not survive. What is the MOST likely reason the crab needs the OCEAN to survive?

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Which way does energy flow in this food chain ?

• from the owl to the snake

• from the grass to the grasshopper

• from the snake to the mouse

• from the eagle to the grasshopper

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If a grassland ecosystem, if the population of hawks suddenly decreased, what will MOST likely be the effect on the rest of the ecosystem ?

• The nutrition of the soil will be affected negatively.

• There will be a decrease in snakes in the ecosystem

• The ecosystem would become overpopualted with snakes.

• Many different species of plants will begin growing in the ecosystem.

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