Unit 4 Review: Ecosystems

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.

Polar bears are actually black, not white.

Polar bear fur is translucent, and only appears white because it reflects visible light. Beneath all that thick fur, their skin is jet black.

• True

• False

Which lists only abiotic factors in this environment?

• grass, tree, rock, soil

• bird, turtle, grass, tree

• sun, water, grass, soil

• water, rock, soil, sun

Tags

NGSS.MS-LS2-3

Identify the correct order of ecological organization beginning with the smallest level and ending with the largest.

• Population, community, organism, ecosystem

• Ecosystem, community, population, organism

• Organism, population, community, ecosystem

• Organism, community, population, ecosystem

Which are examples of abiotic factors? Select three options.

• Sunlight

• Oxygen

• Rotting leaves

• Stones

• Fungi

Tags

NGSS.MS-LS2-3

Which are examples of biotic factors? Select three options.

• Sunlight

• Animals

• Rotting leaves

• Stones

• Fungi

Tags

NGSS.MS-LS1-4

NGSS.MS-LS2-4

Which level of ecological organization includes both biotic and abiotic factors?

• an ecosystem

• a population

• a community

• an organism

Tags

NGSS.MS-LS2-3

Which two levels of ecological organization include members of only a single species?

• population and community

• organism and population

• community and organism

• ecosystem and population

Identify the correct order of ecological organization beginning with the largest level and ending with the smallest.

• Population, community, organism, ecosystem

• Ecosystem, community, population, organism

• Organism, population, community, ecosystem

• Organism, community, population, ecosystem

Which statement best describes ecological succession?

• The passing of traits from parent to offspring

• The change in the characteristics of a species over several generations and relies on the process of natural selection

• The observed changes in an ecological community over time

• None of these