Chapter 21 Lesson 1 Populations

The parts of Earth and the surrounding atmosphere where there is life.

• biosphere

• community

• population

• ecosystem

The biosphere includes all of the following except?

• North American continents

• bottom of the Pacific Ocean

• low atmosphere

• surface of the Moon

A group of organisms that live in an area at one time, as well as the climate, soil, water, and other nonliving parts of the environment.

• biosphere

• community

• population

• ecosystem

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The study of all ecosystems on Earth is called

• ecology

• histology

• biology

• embryology

All the populations of different species that live in the same area at the same time.

• biosphere

• community

• population

• ecosystem

All the organisms of the same species that live in the same area at the same time.

• biosphere

• community

• population

• ecosystem

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A group of organisms that have similar traits and are able to produce fertile offspring.

• species

• community

• population

• ecosystem

The struggle in a community for the same resources, such as food, water, and shelter.

• limiting factor

• population density

• carrying capacity

• competition

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If the amount of available food decreases, what do you think happens to a population of meerkats?

• Some might move away to find food elsewhere.

• The population will become larger.

• The population will remain the same.

• The population will thrive.

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True or False. Changes in environmental factors, such as temperature, food availability, water, and shelter, will not change the size of a population.

• True

• False - will

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