Ecosystems: Living Things and the Environment

Which best describes an organism’s niche?

• life span

• habitat

• environment

• role

A _______________________is an environment in which an organism’s needs are met.

• community

• niche

• habitat

• population

Which statement describes the habitat of polar bears?

• Polar bears eat meat, so they are carnivores.

• Polar bears are predators because they hunt other animals.

• Polar bears live in the Arctic, where it is cold and icy.

• Polar bears are active all year and do not hibernate.

Which best compares habitat and niche?

• Niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.

• Habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.

• Habitat is a group of organisms that live in an area, and niche is a specific species that lives in that area.

• Niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

Which headings best complete the chart?

• X: Abiotic

  Y: Biotic

• X: Biotic

  Y: Abiotic

• X: Niche

  Y: Habitat

• X: Habitat

  Y: Niche

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Which lists only abiotic factors in this environment?

• grass, tree, rock, soil

• bird, turtle, grass, tree

• sun, water, grass, soil

• water, rock, soil, sun

Which describes a similarity between abiotic and biotic factors?

• They may include things that were once living.

• They are both necessary for organisms to survive.

• They are not usually important parts of the environment.

• They can be easily replaced if they are used or destroyed.

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Which are examples of biotic factors? Select three options.

• rotting log

• stream water

• dead leaves

• bacteria

• soil

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Which are examples of abiotic factors? Select three options.

• sunlight

• oxygen

• rotting leaves

• stones

• fungi

The picture shows an interaction within an environment. Which describes the interaction?

• Two abiotic factors are interacting.

• Two biotic factors are interacting.

• The tree is abiotic and is interacting with a biotic factor.

• The tree is biotic and is interacting with an abiotic factor.