Part 1: Ecosystems 4.3

1. Which of the following describes the role or function an organismperforms in the food web of its community?

• Habitat
• Niche
• Life cycle
• Adaptation

2. 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 different types of cacti living in a desert
• A population of ducks, fish, lilies, and insects living in a pond

3. What are THREE nonliving factors of an ecosystem?

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4. In which scenario would a scientist use a dichotomous key?

• When identifying variables in an investigation about fish
• When comparing and contrasting trees in a yard
• When measuring how much different puppies weigh
• When observing monkeys and noting their behaviors

5. A positive human influence on ecosystems is —

• cutting down a forest
• hiking on a mountain trail
• feeding wild animals
• growing crops without pesticides

6. What is part of the deer’s niche?

• The deer eats the cougar.
• The deer is an herbivore.
• The deer eats the rabbit.
• The deer is a carnivore.

7. Which of the following is true?

• The rodent eats more than one organism.
• The frog eats the snake.
• The cougar eats the snake.
• The frog is an herbivore.

8. 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 the grass died out, all of the animals would be affected.
• If a bear was added to the web, the population of rodents would die out.

9. Which THREE animals are examples of populations?

• flock of geese
• group of butterflies and ladybugs
• school of fish swimming
• cows walking on a farm
• pets (dogs and cats)

10. 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