Trophic Levels

According to the image, what is the producer?

• plant

• insect

• mouse

• snake

According to the image, what is the primary consumer in the food chain?

• plant

• insect

• mouse

• snake

According to the image, what is the secondary consumer?

• plant

• insect

• mouse

• snake

What kind of organisms are usually primary consumers?

• plants

• herbivores

• carnivores

What kind of organisms are usually at the top of the food chain?

• producers

• herbivores

• omnivores

• carnivores

The efficiency of energy transfer from a lower trophic level to the next highest level is roughly

• 1%
• 10%
• 100%
• 1000%

Trophic levels are represented by 

• squares
• circles
• pyramids
• lines

The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.
• It shows how sunlight flows within an ecosystem.
• They show what direction the energy is flowing between organisms. 
• They represent how water is transferred within a habitat.

In the energy pyramid here, how much of the energy in each level gets lost as heat or used by the organism for survival?

• 80%
• 90%
• 10%
• 20%

Click on the picture to answer the question. What is true about a food chain?

• It is just 1 path of energy.

• It is all possible energy paths.