Grade 4 Chapter 2 Ecosystems

Which of the following describes the role or function an organism performs in the food web of its community?

• Habitat

• Niche

• Life cycle

• Adaptation

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Which example describes a community?

• The number of mother deer and baby deer living in a forest

• A population of gorillas living in a rain forest

• A population of ducks, fish, lilies, and insects living in a pond

• A population of different types of cacti living in a desert

What are THREE nonliving factors of an ecosystem?

• sunlight

• grass

• soil

• water

• grasshopper

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In which scenario would a scientist use a dichotomous key?

• When observing monkeys and noting their behaviors

• When measuring how much different puppies weigh

• When comparing and contrasting trees in a yard

• When identifying variables in an investigation about fish

A positive human influence on ecosystems is —

• cutting down a forest

• hiking on a mountain trail

• feeding wild animals

• growing crops without pesticides

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What is part of the deer’s niche?

• The deer is an herbivore.

• The deer eats the rabbit.

• The deer is a carnivore.

• The deer eats the cougar.

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Which of the following is true?

• The rodent eats more than one organism.

• The frog is an herbivore.

• The frog eats the snake.

• The cougar eats the snake.

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After analyzing the food web, what is one conclusion you could make?

• The snake is a decomposer.

• There are six carnivores in this ecosystem.

• If a bear was added to the web, the population of rodents would die out.

• If the grass died out, all of the animals would be affected.

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Which THREE animals are examples of populations?

• school of fish swimming

• group of butterflies and ladybugs

• flock of geese

• cows walking on a farm

• pets (dogs and cats)

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What do food webs show?

• The flow of energy within one population

• The habitats of different communities

• The flow of energy in an ecosystem

• The cycles of the sun’s energy in one species

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