Ecosystems Unit Test

A small, clear puddle of water was created in an empty patch of land after a storm. What is the MOST visible abiotic component (thing) of the puddle?

• air

• plants

• temperature

• water

Based on the above food chain, which animals are BOTH predators and prey?

• caterpillars and chameleons

• caterpillars and plants

• chameleons and snakes

• chameleons and mongooses

Which object in this picture would be described as a biotic factor?

• air

• sand

• seagull

• water

A Mississippi black bear consumes plants, insects, grubs, and rotting flesh as part of its diet. What term describes the bear's role in a food web?

• carnivore

• decomposer

• herbivore

• omnivore

Which ecosystem would be classified as a terrestrial ecosystem?

• estuary

• forest

• lake

• marsh

Which is an example of a limiting factor in an ecosystem?

• air temperature in a grassland

• shape of flowers in a meadow

• number of trees in a forest

• water moving in a river

Which statement about limiting factors is true?

• If there are MORE plants than usual in an area, populations of animals that eat the plants will decrease.

• If the water supply in an area DECREASES, the population that needs the water will most likely INCREASE.

• If organisms no longer have enough space, they will either move or die.

• If a population of prey INCREASES, the population of predators will decrease because of the availability of food is less.

Through which organisms does ENERGY enter this ecosystem?

• grass and cactus

• coyote and hawk

• rabbit and grasshopper

• rattlesnake and roadrunner

What is the primary source of energy in MOST living communities?

• animal

• plant

• soil

• sun

What is TRUE about this food web?

• Snakes feed on mice and lizards for food.

• Eagles feed on mice and snakes for food.

• Mice feeds on grasses and lizards for food.

• Lizards feeds on grasshoppers and rabbits for food.