Ecosystem Review

Which group of organisms eats other living things in order to survive? 

• producers
• consumers
• scavengers
• decomposers

Which consumers in a grassland ecosystem would be considered both a predator and prey?

• a grasshopper, because it eats grass and is eaten by birds
• a rabbit, because it eats snakes and is eaten by deer
• a snake, because it eats mice and is eaten by hawks
• an earthworm, because it eats dead animals and is eaten by birds

Which organism is a decomposer?

• fungus
• ladybug
• spider
• sunflower

Which type of organisms produce both oxygen and food for the ecosystem?

• producers
• consumers
• decomposers
• scavengers

Which group contains decomposers only?

• spider, fungi, and grass
• ladybug, spider, and deer
• sunflower, tree, and grass
• fungi, bacteria, and worms

Which group will carnivores feed upon?

• producers
• decomposers
• consumers
• scavengers

Why are decomposers an important part of an ecosystem?

• They break down dead organisms to return nutrients to the soil.
• They produce their own food for survival.
• They play a role in preventing weathering and erosion.
• They provide most of the energy to the consumers.

Using the web, which best describes the role of the salmon?

• The salmon is a producer because it makes it's own food.

• The salmon is a decomposer because it eats krill.

• The salmon is a consumer because it eats krill.

• The salmon is a producer because it eats krill.

Temperature, light, air, water, and soil are all _____ parts of the environment

• alive

• biotic

• abiotic

• living

Which of the following is a biotic factor in an ocean ecosystem?

• the salt content of the water

• the temperature of the water

• the fish in the water

• the oxygen in the water