WorksheetsFood Webs & Food Chains Assessment
Total questions: 30
Worksheet time: 17mins
Organisms that make their own food are called__.
primary producers
primary consumer
heterotrophs
secondary consumers
Organisms that do not make their own food are called__.
primary producers
autotrophs
heterotrophs
plants
Bacteria and fungi are examples of __.
heterotrophs or primary consumers
autotrophs or primary producers
heterotrophs or secondary consumers
none of the above
Worms and fungi are best described as __.
scavengers
autotrophs
heterotrophs
decomposers
Vultures and blow flies are best described as __.
scavengers
autotrophs
producers
decomposers
The ultimate source of energy for food webs and chains is the __.
omnivore
herbivore
sun
moon
__ is the process by which plants make their own food.
chemosynthesis
photosynthesis
respiration
all of the above
__ is the process by which bacteria make their own food from chemicals in hydrothermal vents.
chemosynthesis
photosynthesis
respiration
all of the above
An example of an omnivore are__.
lions
phytoplankton
snakes
humans
Which of the following is an example of a producer?
shark
phytoplankton or algae
rabbit
zooplankton or jellyfish
Evaluate the food web. How many organisms in the food web does the mayfly competes with for the zooplankton?
one
two
three
four
Evaluate the food web. How many organisms in the food web does the brown trout competes with for the minnow?
one
two
three
four
none
Analyze the food web. What is the highest trophic level observed in a food chain from this food web?
six
five
four
three
two
Analyze the food web. What trophic level is the zooplankton located in this food web?
six
five
four
three
two
Analyze the food web. What could happen to the other organisms if the frogs go extinct? Select the best answer choice.
snake population dies off
mayfly and dragonfly populations increase
salamander population increase
phytoplankton decreases
Based on the trophic levels, what happens to energy as the food chain goes from producers to primary consumer to tertiary consumer?
energy remains the same
energy is gained
energy is lost
all of the above
An energy pyramid is shown. At which level of the energy pyramid would most of the biomass be found?
Top Predator
Carnivore
Herbivores
Producers
Which of the following characteristics is shared by both primary and secondary consumers?
Uses the Sun’s radiant energy to produce food.
The first step in any food chain diagram.
Eats only plants to gain needed energy.
Gains energy by eating other living things.
A diagram is provided. Which portion of the diagram represents the level with the most available energy?
Producers
Herbivores
Carnivores
Top Predators
Which of the following correctly shows one path that energy would flow through this ecosystem?
Grasses → Termite→ Monkey→ Eagle
Hyena → Mongoose → Mouse → Grasses
Grasses → Termite→ Grasshopper → Monkey
Acacia trees → Giraffe → Lion → Vulture
A reduction in deer population will have the effect in the amount of energy this ecosystem is able to provide for which of the following organisms?
Rabbit
Mountain lion
Mouse
Hawk
For an energy pyramid, the 10% rule states that
10% of the energy is transferred from one organism to the next.
10% of the energy is gained.
10% of the animals will starve.
10% of the producers are eaten.
Grass > Grasshopper > Bird > Snake
Which of the following shows the proper order of a food chain?
producers --> carnivores --> decomposers --> herbivores
herbivores --> decomposers --> producers --> carnivores
producers --> herbivores --> carnivores --> decomposers
producers --> carnivores --> herbivores --> decomposers
An elephant eats only plants. Which type of consumer is an elephant?
an herbivore
a carnivore
a second-level consumer
a third-level consumer
What is the role of a decomposer in a food web?
It eats animals
It produces its own food and provides other organisms with food.
It eats plants.
It breaks down dead plants and animals into minerals.
If a person is eating carrots, the person is eating as a __.
producer
primary consumer
secondary consumer
tertiary consumer
