Ecologists study feeding patterns to learn how energy flows within a(n)

Organisms that use the sun's energy to turn water and carbon dioxide into food molecules are called

A diagram that shows the amount of energy that moves from one feeding level to another in an ecosystem is called a(n)

The process of evaporation, condensation, and precipitation make up the

'Free' nitrogen gas is changed into a usable form of nitrogen in the process called

Wind, water, and living things are three means of

The type of biome that exists in an area is determined by its

The biome which receives less than 25 centimeters of precipitation a year is the

An extremely cold, dry land biome is the

Succession is the series of predictable changes that occur over time in a

A(n) _____ is a carnivore that feeds on the bodies of dead organisms.

Plants, algae, and some microorganisms make food molecules in the process of

The very slow motion of huge blocs of Earth's crust is called

Physical barriers. competition, and climate conditions can limit the _____ of a species

A(n) ____ is a group of ecosystems with similar climates and organisms.

________ break down wastes and dead organisms and return raw materials to the environment.

____ is not recycled in ecosystems.

Species that have been carried into a new location by people are known as ___________.

The study of where organisms live is called _____.

Wolves, foxes, and caribou are typical animals in the __________ biome

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