What is an ecosystem?

• A single organism

• A community of living organisms interacting with their physical environment

• A non-living environment

• A group of similar species

Which of the following is a biotic factor?

• Temperature

• Water

• Plants

• Soil

Which of the following is an abiotic factor?

• Animals

• Bacteria

• Fungi

• Sunlight

Energy in an ecosystem primarily comes from the _______.

• Moon

• Sun

• Stars

• Earth

Fill in the blank: A food chain is a _______ path of energy transfer.

• circular

• linear

• random

• complex

Which of the following is a primary consumer?

• Carnivores

• Herbivores

• Decomposers

• Producers

Fill in the blank: Only about _______ of energy transfers between levels in a food chain.

• 5%

• 10%

• 20%

• 50%

Which of the following is an example of an ecosystem?

• A single tree

• A desert

• A rock

• A cloud

Fill in the blank: Every organism in an ecosystem has a specific _______ and function.

• size

• role

• color

• shape

Fill in the blank: Biotic factors include plants, animals, bacteria, and _______.

• sunlight

• fungi

• water

• temperature