Trophic Levels and Energy Transfers

Trophic levels

is the position an organism takes in the ​food chain

​Secondary Consumers

• largely carnivores that feed on the primary consumers or herbivores

• 3rd Trophic levels

​Tertiary Consumers

• Those that eat Secondary consumers

• Large predators

​Decomposers

• Decomposers are organisms that break down dead or decaying organisms

• perform a valuable service as Earth's cleanup crew

Multiple Choice

Who makes their own food?

• The Sun

• Producers

• Consumers

• Decomposers

Match

Match the following

• Producers

• 1 consumer

• 2nd Consumer

• Tertiary consumer

Plants

Rabbit

Snake

Hawk

• Plants

• Rabbit

• Snake

• Hawk

Reorder

Reorder the following from sun to tertiary consumer

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

consumers- eat food

vs

producers-make own food

Multiple Choice

What is the sun's role in the energy pyramid?

• to produce chemical energy for the ecosystem.

• to provide radiant energy for producers to convert to chemical energy.

• to start the energy flow of the ecosystem.

• to provide mechanical energy for producers to convert to chemical energy.

Multiple Choice

The diagram is intended to show relationships in an ecosystem. What do the arrows represent?

• The direction of population migration

• Differences in dietary habits

• Progressively smaller organisms

• The direction of the energy flow

Multiple Choice

In this energy pyramid, what is the proper name for ANY ORGANISM ABOVE THE PRODUCER LEVEL?

• decomposers

• consumers

• producers

• omnivores

Multiple Choice

The diagram represents different levels of a marine food pyramid. Between which two levels is the greatest amount of energy transferred?

• 3 and 4

• all equal amounts of energy being transferred

• 2 and 3

• 1 and 2

Multiple Choice

Which organism in figure 1 contains the most available energy?

• plants

• hawks and owls

• spiders

• foxes

Multiple Choice

What makes an energy pyramid different than a food web or chain?

• It shows energy flowing from the top of the chain and downward.

• The tropic levels are the opposite

• It shows the amount of energy in each trophic level

• It shows specific predator/prey relationships

Multiple Choice

True or False. In this energy pyramid, the consumers on each level only get about 10 percent of energy that the trophic level before it has stored.

• True

• False

Multiple Choice

If only 10% of an organism's energy is available for the next trophic level, what happens with the other 90% of the energy?

• It is destroyed after it is used up.

• It is used for life processes or lost as body heat.

• It remains for the next trophic level IF the predator consumes ALL of the organism.

• It is lost completely as body heat.

Multiple Choice

What organisms can take energy from the sun to create its own energy in the form of glucose?

• Primary consumers

• Primary producers

• Secondary consumers

• Tertiary consumers

Multiple Choice

The word "primary" means "first."

If that's true, what does primary consumer mean?

Hint: look carefully at the food chain!

• the first organism in a food chain

• the first organism that consumes something else for energy

Multiple Choice

According to the image, what is the producer?

• plant

• insect

• mouse

• snake

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 (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

Which animal is not the apex predator but, a predator to a mouse?

• hawk
• rabbit
• snake
• grass

Multiple Choice

Eat primary consumers (can be carnivores and omnivores)

• Tertiary Consumers
• Secondary Consumers
• Quaternary Consumers 
• Top Predators 

Multiple Choice

The diagram represents different levels of a marine food pyramid. Between which two levels is the greatest amount of energy transferred

• R and Q
• S and R
• T and S
• U and T

Multiple Choice

The primary consumer in this image is the....

• Hawk

• Grass

• Grasshopper

Multiple Choice

The diagram represents a model of a food pyramid.  Which statement best describes what happens in this food pyramid?

• More organisms die at higher levels than at lower levels, resulting in less mass at higher levels.
• Energy is lost to the environment at each level, so less mass can be supported at each higher level.
• When organisms die at higher levels, their remains sink to lower levels, increasing the mass of lower levels.
• Organisms decay at each level, and thus less mass can be supported at higher levels

Multiple Choice

How much energy is transferred from one trophic level to the next?

• 10%

• 100%

• 90%

• 1%

Multiple Choice

How much energy is lost as heat as you move through the trophic levels?

• 1%

• 10%

• 90%

• 100%

Multiple Choice

The omnivores in this diagram are the .....

• Grass

• Rabbits

• Snakes

• Hawk

Multiple Choice

An animal that only eats secondary consumers would be a....

• Primary producer

• primary consumer

• Secondary consumer

• Tertiary consumer

Multiple Select

Select the organisms that eat primary producers

• Primary producers

• Primary consumers

• Secondary consumers

• Tertiary consumers

Multiple Choice

If a primary producer has 1,000 Joules of energy, then how much energy would a primary consumer get?

• 100 J

• 10 J

• 1 J

• 10,000 J

Multiple Choice

Which organisms go through photosynthesis?

• Primary producers

• Primary consumers

• Secondary consumers

• Tertiary consumers

Multiple Choice

If a tertiary consumer had 20 Joules of energy, then how much energy would a secondary consumer have?

• 200 J

• 2,000 J

• 20,000 J

• 2 J

Multiple Choice

Secondary consumers are also known as...

• Herbivores

• Omnivores

• Carnivores

Multiple Choice

The following are example of ....

• Primary producers

• Primary consumers

• Decomposers

• Secondary consumers

Multiple Choice

Which organism eats every other organism on the trophic levels?

• Tertiary consumers

• Decomposers

• Primary producers

• Primary consumers