USA 9 Review

Front

Which of the following characteristics is shared by both primary and secondary consumers?

Back

They both gain energy by eating other living things.

Front

An energy pyramid is shown. Which portion of the diagram represents the level with the most available energy? Options: Top Predator, Carnivore, Herbivores, Producers

Back

Producers

Front

Which organisms in the marine food chain transform energy from the Sun into food?

Back

Phytoplankton

Front

A forest has 100,000 kcal of energy in its producers. Approximately how much energy would you expect to be available at the secondary consumer level?

Back

1,000 kcal

Front

Examine the food web below. Which organism from the food web is responsible for recycling matter AND explain its role.

Back

Decomposer

Front

What happens to most of the energy as it moves from one trophic level to the next?

Back

It is converted into heat and lost to the environment.

Front

Which of the following is an example of matter cycling through an ecosystem?

• Carbon dioxide is absorbed by plants and released by animals.
• Energy is transferred from producers to consumers.
• Sunlight is converted into chemical energy by plants.
• Heat is released into the atmosphere during respiration.

Back

Carbon dioxide is absorbed by plants and released by animals.

Front

What is the primary reason ecosystems are able to sustain themselves over time?

Back

There is a constant flow of energy from the Sun and cycling of matter by organisms.

Front

In an ecosystem, which process is primarily responsible for the conversion of solar energy into chemical energy?

Back

Photosynthesis

Front

Role of producers in an ecosystem?

Back

They convert solar energy into chemical energy.