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Food Webs (Grade 4)

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Food Webs

What is composed of several food chains in an ecosystem that intersect and depend on one another?
  1. niche
  2. feeding level
  3. energy pyramid
  4. food web
In an ecosystem, how are food webs and food chains different?
  1. Food webs begin with animals, and food chains begin with plants.
  2. Food webs rarely begin with plants, and food chains begin with animals.
  3. Food webs show the relationship between many different food chains in a single ecosystem.
  4. Food chains show the relationship between many different food webs in a single ecosystem.
Some scientists think that a food web with many connections is more stable than one with few connections.
  1. True
  2. False
Which organisms can be found at the first, or lowest, trophic level?
  1. herbivores
  2. carnivores
  3. heterotrophs
  4. autotrophs
An organism which lives on or in another organism and derives its nutrition from that organism is a(n)
  1. autotroph.
  2. heterotroph.
  3. parasite.
  4. saprophyte.
Any organism that must obtain its food from a source outside itself is a(n)
  1. autotroph.
  2. heterotroph.
  3. parasite.
  4. saprophyte.
Which type of organism breaks down the cells of dead organisms?
  1. producer
  2. consumer
  3. decomposer
  4. omnivore
Which is a consumer?
  1. cow
  2. grass
  3. mushroom
  4. peach tree
What is an example of a decomposer?
  1. cactus
  2. flower
  3. grass
  4. mushroom
Which series correctly describes how energy is passed among the four organisms?
  1. consumer, consumer, decomposer, producer
  2. decomposer, consumer, consumer, producer
  3. producer, consumer, consumer, decomposer
  4. consumer, decomposer, producer, consumer
Deer and zebra feed on grasses and other plants. Leopards and lions feed on deer and zebra. Which description is the role of deer and zebra in this ecosystem?
  1. producer
  2. carnivore
  3. decomposer
  4. consumer
In a food chain, there are decomposers, consumers, and producers. In a food web that has grass, hawks, grasshoppers, and snakes, the third-level consumer is the
  1. grass
  2. snake
  3. hawk
  4. grasshopper
Everyone in our class eats chicken, pig, cow, fish, turkey, and all sorts of other animals. Everyone in our class also eats plants such as salad and spinach. We also eat fruits and veggies such as apples, bananas, grapes, kiwi, potatoes, carrots, corn, and much more. The best description for humans is that we are
  1. herbivores.
  2. decomposers.
  3. omnivores.
  4. carnivores.
A giraffe's ecosystem is found throughout Africa. Giraffes eat leaves off of tall trees. They may eat veggies or fruits on occasion. Giraffes will never hunt or eat other animals. Giraffes are
  1. herbivores.
  2. decomposers.
  3. omnivores.
  4. carnivores.
A lion does not eat veggies or fruit. They do not eat plants or grass. They eat only meat. This kind of animal is a(n)
  1. herbivore.
  2. decomposer.
  3. omnivore.
  4. carnivore.
Which sequence lists the organisms correctly from the lowest trophic level to highest?
  1. hawk, weasel, chipmunk, seeds
  2. chipmunk, weasel, seeds, hawk
  3. seeds, chipmunk, weasel, hawk
  4. seeds, chipmunk, hawk, weasel
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