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Chapter 20 Earth's Ecosystems Review

Authored by Amy Rowland

Science

7th Grade

Used 257+ times

Chapter 20 Earth's Ecosystems Review
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25 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following is a biotic factor in a biome?

kinds of birds

amount of rainfall

types of rocks

bodies of water

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

The speed of water is an important abiotic factor in a freshwater ecosystem because

a tributary has different plants than a river.

faster water has a higher salt content

animals must adapt so they are not washed away.

animals cannot live in fast-moving water.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

One important abiotic factor in marine ecosystems is the

amount of plankton

water depth

kinds of algae

size of animals

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Most of the nutrients in a tropical rain forest are found in plants, so

the rain forest soil is very rich.

there are few plants in the rain forest.

there are few animals in the rain forest

the rain forest soil is poor in nutrients.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

From where do plankton get food?

small fish

insects

photosynthesis

whales

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What may happen as sediment and decaying organisms build up in a pond?

The pond may become a lake.

More fish may live in the pond.

The water may have more salt.

The pond may become a forest.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can the littoral zone of a lake or pond be described?

an area with no sunlight.

an area with no animal life

an area with no plant life

an area closest to the edge of a lake or pond

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