Ch 13 Review

The ability to do work is a definition of ____________________.

• energy
• mechanical advantage
• potential energy
• watt

Refer to the illustration. The photosynthetic algae are

• producers.
• parasites.
• consumers.
• decomposers.

Refer to the illustration above. The diagram, which shows how energy moves through an ecosystem, is known as a

• habitat.
• food net.
• food chain.
• food web.

Refer to the illustration. Leopard seals are

• producers.
• herbivores.
• omnivores.
• carnivores.

Animals that feed on plants are at least in the

• first trophic level.
• third trophic level.
• second trophic level.
• fourth trophic level.

In water, calcium phosphate dissolves to form which substance that is taken up by the roots of plants?

• phosphate
• nitrogen
• calcium
• carbon

Which of the following is a decomposer?

• worm
• plant
• vulture
• moisture

Precipitation that percolates into the soil becomes

• runoff.
• water vapor.
• groundwater.
• lakes.

All living things are made of

• carbon.
• boron.
• silicon.
• mercury.

Which of the following is not part of the nitrogen cycle?

• conversion of atmospheric nitrogen into usable organic compounds by bacteria
• conversion of nitrogen from decaying organisms into ammonia
• nitrogen fixation
• breathing in nitrogen gas from the atmosphere