Breaks down plant and animal remains and waste into molecules that producers reuse to make energy

• Producers
• Decomposer
• Consumer
• Prey

Which is able to transform the energy of the sun to make food?

• Producer
• Decomposer
• Consumer
• Prey

The cycles of matter on Earth depend on ______________ in which energy moves between organisms.

• energy transfer
• relationships and ecosystem
• food web
• food chain and complex

Food webs are representations of the predator/prey __________ between species within a(n) _________ or habitat.

• energy transfer
• relationships and ecosystem
• food web
• food chain and complex

These graphs show how two factors for a certain region changed over time: the number of predators that prey on mice and number of plants of the type that the mice eat. Based on the information from these graphs, in which of the following years would the population of mice have the highest?

• 1996
• 1998
• 2000
• 2002

The table provides information on population density of mayflies, a kind of insect, in a certain area over a few years. Based on the population density provided, which year provides evidence that there was an increase in the population of birds that prey on mayflies?

• 2005
• 2006
• 2007
• 2008

An example of a predator and a prey species for four separate ecosystems is provided: Which of the following predicts an accurate change to one of the populations of organisms due to a predator/prey interaction?

• When the population of sharks decreases because of fishing, the population of small fish will decrease.
• After a period of heavy rainfall and warmer temperatures, the population of mosquitos will increase.
• During hunting season, when many deer are killed by hunters, the mountain lion population will decline.
• When abundant resources allow the population of mice to increase, the population of snakes will decrease.

A food web diagram is provided: Which of the following organisms depend only on producers for energy?

• Diatoms
• Shrimp
• Amphipods
• Squid

The energy organisms need to live and grow first enters the ecosystem when -

• plants take in light energy from the sun
• decomposers break down dead organisms
• primary consumers eat plants for food
• secondary consumers eat primary consumers

A food web diagram is provided: Which of the following is a path matter could flow through in this ecosystem?

• Sun -> grass -> robin
• Plant seeds -> field mouse -> robin
• Eagle -> deer -> plant seeds
• Grass -> deer -> mountain lion