Food Chains, Food Webs & Energy Pyramids

Food Chains, Food Webs, and Energy Pyramids

By Kate Harnage

Energy begins with photosynthesis. ​

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Where does energy begin?

Multiple Select

What are two PRODUCTS of photosynthesis? (Pick 2)

• CO2

• O2

• sugar

• ATP (energy)

Multiple Choice

What is another name for producers (plants that make their own food)?

• heterotrophs

• autotrophs

Multiple Choice

What is another name for consumers?

• heterotrophs

• autotrophs

Multiple Choice

Organism that eats other things for food

• consumer

• producer

• decomposer

• prey

Multiple Choice

Consumer that eats both plants and animals

• omnivore

• fungivore

• carnivore

• herbivore

Multiple Choice

Consumer that eats only other animals

• omnivore

• frugivore

• carnivore

• herbivore

Multiple Select

Which organism would be found at the first trophic level?

• grass

• lions

• vultures

• antelopes

Multiple Choice

Consumer that eats only plants

• omnivore

• insectivore

• carnivore

• herbivore

Multiple Choice

What are the organisms that break down dead stuff?

• Producers

• Consumers

• Decomposers

• Organisms

Second trophic level
They are "first consumer" to eat for energy.

They are the herbivores which only eat plants.

Primary consumer

​​Secondary consumer

​Fourth trophic level

​​They are "third consumer" to eat for energy.

Carnivores or Omnivores

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Predator or Scavenger​

Tertiary consumers

​Third tropic level​

​They are "second consumer" to eat for energy.

Can be Carnivores = only eat animals or Omnivores = eat plants and animals​

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Predator or Scavenger​

Multiple Choice

In this food chain, the snake would be a

• tertiary consumer

• secondary consumer

• primary consumer

• producer

Multiple Choice

Which would be the appropriate term for an organism that eats a producer?

• scavenger
• decomposer
• secondary consumer
• primary consumer

Multiple Choice

All of the following are consumers except

• Autotrophs
• Herbivores
• Heterotrophs
• Ominvores

Multiple Choice

What is the difference between food chains and food webs?

• Food chains show a single energy pathways, while food webs show several energy pathways

• Food web show multiple energy pathways, while food chains show only one energy pathway

Food webs show several energy pathways within an ecosystem.

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​Food Webs

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90% of energy is lost with each trophic level.*Majority of energy is lost due to heat*

​

They show:

• the amount of energy decreases for higher consumers

• large number of producers are needed to support an​ ecosystem.

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​Energy
Pyramids

​

Multiple Choice

How much energy is lost from trophic level to trophic level?

• 100%

• 90%

• 75%

• 10%

Multiple Choice

Which organisms have the most available energy in an energy pyramid?

• Producers

• Consumers

• Decomposers

• Detritivores

Multiple Choice

Why is some energy not passed on to the next trophic level?

• The organisms at each level use about 90% of the available energy to live.

• The statement is NOT true. All energy IS passed from one trophic level to the next.

• The organisms at each level use about 10% of the available energy to live.

• Most energy is absorbed by the soil instead.

Multiple Choice

How is the majority of energy lost between each trophic level?

• heat

• sleeping

• no energy is lost

Multiple Choice

The diagram represents a pyramid of energy in an ecosystem.  Which level would most likely contain organisms that can photosynthesize?

• A
• B
• C
• D

Multiple Choice

If a disease strikes the snakes the hawks will

• increase

• decrease

• not be affected

Multiple Choice

If a disease strikes the snakes the rabbits will

• increase

• decrease

• not be affected

Multiple Choice

All energy on Earth ultimately comes from what source?

• Water

• Sun

• Consumers

• Oxygen

Multiple Choice

What is the role of the fungi?

• autotroph

• heterotroph

• decomposer

• carnivore

• consumer

Multiple Choice

Which organism is the producer (autotroph) of this ecosystem?

• phytoplankton

• krill

• fish

• leopard seal

Multiple Choice

Which organism is the secondary consumer?

• phytoplankton

• krill

• fish

• leopard seal

Multiple Choice

Where do crickets get their energy?

• Cattails
• Marsh Grass
• Grasshoppers
• Shrews

Multiple Choice

The owl and weasel compete for which organism? (if they COMPETE they eat the SAME food)

• Hawk
• Spider
• Grasshopper
• Shrew

Multiple Choice

In this food web, which 2 animals will compete for the same source of energy (if they COMPETE they eat the SAME food)

• grasshopper and rabbit

• deer and insect-eating bird

• shrew and squirrel

• snake and grasshopper

Multiple Choice

The berries and plantain are best known as

• producers

• primary consumers

• secondary consumers

• decomposers

Multiple Choice

What will both the rat and goat compete for? (if they COMPETE they eat the SAME food)

• a rabbit

• the owl

• a tomato plant

• nothing

Multiple Choice

The shrew provides energy for the ...? (who eats the shrew for energy)

• cricket
• grasshopper
• frog
• snake

Multiple Choice

The owl and weasel compete for which organism? (if they COMPETE they eat the SAME food)

• Hawk
• Spider
• Grasshopper
• Shrew