5th Grade 5.L.2.2 and 5.L.2.3

Food Chains, Food Webs, and Energy Pyramids

By Kate Harnage

Energy begins with photosynthesis. ​

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Where does energy begin?

Plants use water & carbon dioxide to store energy from the sun in glucose.

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​Organisms that use photosynthesis to make food are called producers.​

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​Photosynthesis

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You have to know the formula for photosynthesis.

Multiple Choice

What is another name for producers?

• heterotrophs

• autotrophs

Multiple Select

What is produced as a result of photosynthesis? (Pick 2)

• CO2

• O2

• sugar

• ATP (energy)

Second trophic level

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​Herbivores = only eat plants

Primary consumer

​​Secondary consumer

​Fourth trophic level

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Carnivores or Omnivore

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Predator or Scavenger​

Tertiary consumers

​Third tropic level​

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Carnivores = only eat animals

Omnivores = eat plants and animals​

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Predator or Scavenger​

Multiple Select

Which organism would be found at the second trophic level?

• grass

• lions

• vultures

• antelopes

Food chains show how energy is transferred from the sun to each trophic level (producer, primary consumer, etc.)

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​Food Chains

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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.

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They show:

• the amount of energy decreases for higher consumers

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

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​Energy Pyramids

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Multiple Choice

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

• heat

• sleeping

• no energy is lost

Multiple Choice

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

• 100%

• 90%

• 75%

• 10%

Multiple Choice

A deer dies in the wild is is considered biotic or abiotic?

• biotic

• abiotic

Multiple Choice

Is the Sun biotic or abiotic

• biotic

• abiotic

Multiple Choice

If mice eat plants and insects what would they be considered?

• ominvore

• carnivore

• herbivore

In food chain the energy flow is the way in which the arrow points. An organism has to EAT food in order to get energy

• 10% of the energy is transferred from one level to the next.

• The organisms at the TOP of the food chain receive the LEAST amount of energy

• Ex. Lions sleep most of the day

the grasshopper has to eat the grass to get energy so the arrow is points to where the energy is going

Multiple Choice

Which organism is considered a secondary consumer?

• snake

• frog

• cricket

• grass

Multiple Choice

A decomposer.......

• makes its own food from

  sunlight, air, and soil

• can't make their own food

• get energy from the remains of dead plants and animals.

Multiple Choice

Plants in a forest need to obtain nutrients from the soil to survive. How do MOST of the nutrients get back in the soil once the forest plants have used them for growth?

• A. Organic matter is recycled from dead organisms.

• B. Commercial fertilizers are applied by humans.

• C. Solar radiation reaches the ground surface.

• D. Rainwater drips off of living organisms.

Multiple Choice

The main function of a producer in an ecosystem is to...

• A. absorb minerals from the soil.

• B. change water vapor into a liquid.

• C. make sugar through photosynthesis.

• D. break down dead plant and animal matter.

Multiple Choice

Which will most likely cause a decrease in predator populations?

• A. an increase in prey populations

• B. a decrease in prey populations

• C. a decrease in decomposers

• D. an increase in producers

Multiple Choice

Which is an example of a decomposer?

• A. a hawk

• B. a mouse

• C. a flower

• D. a mushroom

Multiple Choice

Which gets all of its energy from the sun?

• A. producer

• B. consumer

• C. decomposer

Multiple Choice

What best describes the roles of the organisms listed below in order from left to right?

• A. consumer, producer, consumer

• B. producer, decomposer, consumer

• C. consumer, decomposer, consumer

Multiple Choice

In the food web, which organisms are producers?

• A. frog and rat

• B. rat and leaves

• C. leaves and berries

Multiple Choice

What would happen to the population of fish if they did not receive sunlight?

• increase

• decrease

• stay the same

• none of these

Multiple Choice

Which of these names the predator first and the prey second?

• shrimp and shark

• wolf and rabbit

• fly and frog

• mouse and cat

Multiple Choice

An organism which feeds only on consumers is

• a carnivore

• a producer

• an herbivore

• an omnivore

Multiple Choice

There was a fire in a forest destroying over haof of the ecosystem. What would happen to the plants and animals of the ecosystem?

• Only animals will be destroyed.

• Only plants will be destroyed.

• Plants and animals will be destroyed.

• This ecosystem will remain the same.

Multiple Choice

Animals that can survive in a mixture of saltwater and freshwater can be found in which ecosystem?

• ocean

• estuary

• lake

• pond

Multiple Choice

In which ecosystem would you expect to find the following biotic factors: fish, amphibians, ducks, turtle, beavers, lily pads, and duckweed?

• forest

• grassland

• lakes/ponds

• ocean

Multiple Choice

What is the correct classification for #15 grass?

• decomposer

• carnivore

• producer

• hervibores

Multiple Choice

What would you call the grasshopper in the food chain?

• decomposer

• producers

• herbivores

• carnivores

Multiple Choice

The toad, snake and hawk would all be classified as

• decomposers

• producers

• herbivores

• carnivores

Multiple Choice

The fungi listed in the food chain would be classified as

• decomposers

• producers

• herbivores

• carnivores

Multiple Choice

The snake and toad listed in this food chain would fill what two roles in the chain?

• parasite-host

• predator-prey

• carnivore

• producer-consumer

Multiple Choice

The removal of a predator from a food chain may allow the population of its prey to increase.

• true

• false

Multiple Choice

The removal of a predator from a food chain may allow the population of its prey to increase.

• true

• false