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WorksheetsTrophic Levels
Total questions: 22
Worksheet time: 14mins
This energy pyramid shows how much energy is transferred from one level to the next in an ecosystem.
The amount of energy at each level is given in joules (J).
Which is the BEST estimate of the amount of energy available at the secondary consumer level?
0.1 J
1 J
100 J
10 J
The chart describes the amount of energy at each trophic level. The producer has the highest energy. What is the energy of the secondary consumer?
200 J
2 J
22,000 J
22 J
Which statement BEST explains the flow of energy in the ecosystem?
Energy is not conserved in the ecosystem and surroundings.
The most energy is lost to the environment between secondary and tertiary consumers.
The greatest transfer of energy is from the producers to the primary consumers.
Energy transfer to the coyote would decrease if the coyote preyed directly on prairie dogs.
The plants are the producers, the insects the primary consumers, the iguana is the secondary consumer. What is the tertiary consumer?
monkey
boa
jaguar
tapir
Which statement BEST describes the transfer of energy from organism to organism as matter moves through a food web?
Energy moves in both directions between each trophic level.
Most of the energy is lost to the environment between each trophic level.
Most of the energy at each trophic level is passed on to the next trophic level.
The energy available remains the same as matter passes through different trophic levels.
Select the true statement below based on the ocean energy pyramid. Remember only phytoplankton can make their own food through photosynthesis.
Sharks can get their energy and to produce food
Phytoplankton uses energy to grow and produce food. They are major producers.
Herring uses energy from phytoplankton to produce food.
Zooplankton does NOT need energy for growth.
In this picture you have the grass as producer and the rabbit as a primary consumer.
Which statement below is FALSE?
Remember there are no decomposers living on decaying matter in the picture!
Both the grass and rabbit need energy to live.
The rabbit eats the living grass and breaks down the sugar molecules to get energy.
The grass is a producer and gets energy and matter from the nonliving environment.
The grass gets its energy from dead and decaying matter.
As matter passes through a food web, the amount of energy available to organisms changes.
Which statements is INCORRECT?
Some food energy is lost as heat.
Plants use energy from the sun to produce food.
High-level consumers rely on many different organisms to get enough energy to live.
Lower-level consumers pass all their food energy to higher-level consumers.
In a marine ecosystem, algae carry out photosynthesis. Barracuda eat snapper fish. Reef sharks eat barracuda.
Please review and study this order.
Select the CORRECT answer.
Algae are not producers and should not be at the bottom of the energy pyramid.
How many organisms from the food web belong in trophic level 2?
one
two
three
four
What are the organisms in trophic level 2?
Grass is the only organism in that trophic level.
Bird and frog are the only second-level consumers.
Fox, hawk, owl, and snake are all in that trophic level.
The rabbit, mouse, and grasshopper are the only first-level consumers.
The energy of the primary consumers is 400 J.
Calculate the energy content of the tertiary consumers, secondary consumers, and producers AND explain why there is a gain or loss of energy from one trophic level to another.
An energy pyramid depicts an ecosystem's trophic levels.
Why is bottom trophic level of an energy pyramid typically larger than the top trophic level?
Producers contain the greatest amount of energy in comparison to other trophic levels.
Primary consumers have the greatest amount of energy in comparison to the other trophic levels.
There are more herbivores in an ecosystem than other trophic level.
There are more secondary consumers in an ecosystem than any other trophic level.
Ryan built a biotic community by adding aquatic plants, snails, and small fish into a large jug and placed the jug outside.
He noticed three days later that all of the snails
had been eaten by the fish.
Which best represents the energy flow in this biotic community?
Sun → Plants → Snails → Fish
Sun →Plants →
Snails→ Plants
Fish → Snails → Plants → Sun
Sun →Snails→ Plants →Fish
The source of energy for this food chain is ____________.
Remember the primary energy source for all life is the sun!
Sunlight
Soil
Water
Seeds
What do the arrows indicate in a food chain?
The arrows show the direction in which heat flows.
The arrows show the predator-prey relationships within an ecosystem.
The arrows show what the organisms eat.
The arrows show the direction in which energy flows.
Which type of organism is found at the top of an energy pyramid representing an ecosystem?
Consumer
Decomposer
Prey
Producer
How are humans classified within a food web?
Producers
Consumers
Decomposers
Parasites
What do the first order consumers in this food web have in common?
They are both herbivores and eat plants.
They both rely on insects as a main food source.
They produce their own food.
They are both carnivores.
Which of the following food chains is NOT possible?
Remember in a food chain the starting point is the producer!
grass → redtail hawk → racoon
elderberry → deer → bobcat
grass→ sheep → bobcat
grass → jackrabbit → ocelot
Within the energy pyramid which statement correctly describes the energy flow transfer in an ecosystem?
Organisms at level 4 give indirect energy to all consumers in an ecosystem.
The usable energy in organisms decreases by 90% as you move from level 4 to level 1.
Organisms at level 1 give direct energy to organisms in levels 3 and 4.
All organisms in the four levels receive energy from each other in a continuous cycle.
Which statement describes the correct transfer of energy in an ecosystem?
The usable energy in organisms decreases by 90% as you move from level 4 to level 1.
Organisms at level 1 give direct energy to organisms in levels 3 and 4.
The energy transfers directly from organisms at level 3 to organisms at level 2.
All organisms in the four levels receive energy from each other in a continuous cycle.
