Food Webs Review

In an ecosystem, ________ cycles through its different living and nonliving parts.

• energy

• matter

• waste

• food

Carbon dioxide is released as a waste by...

• producers

• consumers

• decomposers

• consumers & decomposers

An ecosystem is considered ________ because most matter does not leave or enter the ecosystem.

• open

• living

• closed

• perfect

What is the original source of energy in all ecosystems?

• producers

• decomposers

• water

• sunlight

Which type of organism uses sunlight directly for its energy?

• producers

• consumers

• decomposers

• apex predators

An organism loses much of its energy in the form of...

• water

• food

• heat

• carbon dioxide

About how much energy gets transferred when one organism consumes another?

• 1%

• 10%

• 25%

• 99%

Which of these only moves in one direction (does not cycle)?

• energy

• matter

A food web shows you...

• which organisms consume each other

• which organisms are in an ecosystem

• how energy moves through an ecosystem

• all of these

An organism that gets its energy directly from producers is a...

• producer

• first-stage consumer

• second-stage consumer

• third-stage consumer