Populations and Communities (7th Grade Science)

Which of the following is a biotic factor in the prairie ecosystem?

• sunlight

• soil

• grass

Tags

NGSS.MS-LS2-1

The place where an organism lives and that provides the things the organism needs is called its

• habitat

• population

• community

The smallest unit of ecological organization is a single

• population.

• organism.

• ecosystem.

Which of the following is an example of a population?

• the cats and dogs in your neighborhood

• the bushes and grass in a park

• the gray wolves in a forest

Tags

NGSS.MS-LS2-1

If you count 20 beetles in a garden measuring 5 square meters, the population density of the beetles is

• 100 beetles per square meter.

• 20 beetles per square meter.

• 4 beetles per square meter.

Counting the number of organisms in a small area and multiplying to estimate the number in a larger area is called

• direct observation.

• population density.

• sampling.

A group of antelope leaving the herd in search of better grassland is an example of

• immigration.

• emigration.

• decreasing death rate.

The largest population that an environment can support is called its

• carrying capacity.

• birth rate.

• death rate.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

An organism’s particular role in its habitat, or how it makes its living, is called its

• carrying capacity.

• ecosystem.

• niche.

The behaviors and physical characteristics of species that allow them to live successfully in their environment are called

• habitats.

• biotic factors.

• adaptations.

Tags

NGSS.MS-LS4-4