LSS107 Diversity and Ecology - Food Chains, Webs & Trophic Levels

LSS107 Diversity and Ecology

​Food Chains, Food Webs, and Trophic Levels

by Angela Toh

Multiple Choice

What energy role describes an organism that makes its own food, usually by using energy from the sun?

• consumer
• producer
• carnivore
• decomposer

Multiple Choice

All of the following are types of consumers EXCEPT for

• carnivore
• herbivore
• omnivore
• producer

Multiple Choice

These organisms break down decaying biotic wastes and then return the materials to the ecosystem.

• decomposers
• scavengers
• carnivores
• producers

Multiple Choice

An maple tree takes in energy from the sun and uses it to make food for itself. This energy role is

• herbivore
• omnivore
• producer
• consumer

Multiple Choice

An organism that gets energy from breaking down dead organisms, non-living material or waste is a(an) ___________.

• producer
• consumer
• decomposer
• autotroph

Fill in the Blanks

Multiple Choice

Are nutrients in an ecosystem recyclable?

• Yes

• No

Multiple Choice

Is the energy in an ecosystem recyclable?

• Yes

• No

Multiple Choice

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.

Multiple Choice

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

• plant

• insect

• mouse

• snake

Multiple Choice

According to the image, what is the secondary consumer?

• plant

• insect

• mouse

• snake

Multiple Choice

This question is confusing! Look carefully at the image. What trophic (energy) level is the secondary consumer?

• 1st

• 2nd

• 3rd

• 4th

Multiple Choice

This question is confusing! Look CAREFULLY at the image. What trophic level is the PRIMARY consumer?

• 1st

• 2nd

• 3rd

• 4th

Multiple Choice

What kind of organisms are usually primary consumers?

• plants

• herbivores

• carnivores

Multiple Choice

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

• producers

• herbivores

• omnivores

• carnivores

Multiple Choice

Look carefully at the image. If energy is lost as it moves up the food chain, what trophic level has the most amount of energy?

• 1st level - producers

• 2nd level - primary consumers

• 3rd level - secondary consumers

• 4th level - tertiary consumers

Multiple Choice

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

• 1%
• 10%
• 100%
• 1000%

Multiple Choice

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%

Multiple Choice

The process of plants using energy from the sun to create the first trophic level is called?

• Photosynthesis
• Chemosynthesis
• Cellular Respiratation
• Primary Producers

Multiple Choice

All energy transformations in an ecosystem begin with

• a scavenger
• the sun
• a decomposer
• a herbivore

Multiple Choice

a system of food chains that shows the transfer of energy  is termed

• food web
• food chain
• prey
• predator

Multiple Choice

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.

Multiple Choice

A connection of food chains with many food energy paths in an ecosystem is a ____________

• ecosystem
• food web
• environment
• population

Multiple Choice

A food web can be broken down into several seperate

• food chains
• food pyramids
• producers
• consumers

Multiple Choice

In this food web, what does the western whiptail eat?

• Pacific Tree Frog

• Bob Cat

• Mule Deer

• Raven

• Pine Marten

Multiple Choice

In this food chain, what will happen if the frogs become extinct?

• The snakes will increase.
• The grasshoppers will decrease.
• The eagles will remain the same.
• The grasshoppers will increase.

Multiple Choice

Which of the following would be the most likely effect, if there were a sudden increase in the cricket population?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

Multiple Choice

Use the diagram answer the question.
What is a fitting description for this diagram?

• A Food Chain
• An Ecosystem
• A Food Web
• Biotic and Abiotic Factors

Multiple Choice

Which animal is the apex predator?

• hawk
• lizard
• snake
• grass