Ecosystem Test Review

Select all the organisms that are PRODUCERS

• Algae

• Tree

• Grass

• Lady Bug

What will happen if the population of the beetle starts to disappear?

• the grass population will decrease

• the rat will have less food

• the rat will have more food

• the owl will have more food

Why are decomposers so important for the ecosystem?

• They produce their own food.

• Provide energy for other organisms.

• Stop the flow of energy from one organism to another.

• They break down biotic waste and return the raw materials to the environment.

Use the food web to answer the following question: Which organism can be classified as a herbivore?

• Owl

• Rabbit

• Hawk

• Snake

Which organism would be found at the top of the energy pyramid?

• Grass

• Grasshopper

• Fish

• Bear

Which of the following would the fish, seaweed, and starfish form?

• community

• ecosystem

• habitat

• population

Which organism would most likely be at level 4?

• Bunnies

• Hawk

• Tree

• Snakes

Which organism gets their energy DIRECTLY from the sun?

• Decomposers

• Scavengers

• Consumers

• Producer

Which one is NOT a biotic factor

• animal wastes

• sunlight

• tree

• frog

What do all of the zebras in the African Savannah form?

• population

• ecosystem

• community

• organism