P6 Science · Chapter 2brightbit.net/worksheets
Food Webs
Name: ______________________Class: ________Date: ____________Score: ____ / 10
- 1.
A food web is different from a food chain because a food web —
(a) Has only one producer(b) Shows a single pathway of energy flow(c) Shows many interconnected food chains in an ecosystem(d) Does not include producers
- 2.
In a food web, a grasshopper eats grass and is eaten by both frogs and birds. If the frog population decreases, what is the MOST LIKELY effect on the grasshopper population?
(a) Grasshopper population decreases(b) Grasshopper population increases(c) No change to the grasshopper population(d) Grasshoppers will become producers
- 3.
Why is a food web a more accurate representation of feeding relationships than a single food chain?
(a) Food webs are shorter(b) Most organisms feed on more than one type of food(c) Food webs do not include decomposers(d) Food chains show more detail
- 4.
In a pond food web, algae are eaten by tadpoles and water snails. Tadpoles are eaten by dragonfly larvae. Water snails are eaten by fish. If all the algae died, which organisms would be MOST directly affected?
(a) Only the tadpoles(b) Only the water snails(c) Both tadpoles and water snails(d) Only the fish
- 5.
What would happen to a food web if all the decomposers were removed?
(a) Nothing would change(b) Dead organisms would pile up and nutrients would not be recycled(c) Producers would grow faster(d) Consumers would become decomposers
- 6.
In a food web, an organism that eats both plants and animals is called an —
Answer: ____________________________________
- 7.
Study this food web: Grass → Grasshopper → Frog → Snake → Eagle. Grass → Rabbit → Eagle. If the snake population is removed, the eagle population would MOST LIKELY —
(a) Die out completely(b) Not be affected at all because eagles also eat rabbits(c) Increase greatly(d) Switch to eating grass
- 8.
A student draws a food web for a garden. Which of these organisms would be a producer?
(a) Caterpillar(b) Earthworm(c) Rose plant(d) Spider
- 9.
In a food web, why does an increase in the number of predators usually lead to a decrease in the number of prey?
(a) Prey animals move to another ecosystem(b) More predators means more prey are eaten(c) Predators eat the plants too(d) Prey animals stop reproducing
- 10.
A food web in a forest includes: Berries → Mouse → Owl, Berries → Squirrel → Fox, Grass → Rabbit → Fox. Which organism, if removed, would affect the MOST other organisms?
(a) Owl(b) Mouse(c) Fox(d) Berries
Answer key — P6 Science: Food Webs
For parents. Step-by-step explanations for every question are free on brightbit.net.
- 1.(c) Shows many interconnected food chains in an ecosystem
- 2.(b) Grasshopper population increases
- 3.(b) Most organisms feed on more than one type of food
- 4.(c) Both tadpoles and water snails
- 5.(b) Dead organisms would pile up and nutrients would not be recycled
- 6.omnivore
- 7.(b) Not be affected at all because eagles also eat rabbits
- 8.(c) Rose plant
- 9.(b) More predators means more prey are eaten
- 10.(c) Fox
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