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Food Chain Pages
More Cloze Activities
Food Chain:
Cloze Activity
Fill in the blanks below using words from the word bank.
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Answers

Word Bank:
arrows
energy
sea
sun
herbivores
consumers
photosynthesis
bears
detrivores
top
grass
carnivores
lost
omnivores
meal
snakes

Every organism needs to obtain energy in order to live. Plants get their energy from the __________________________________ and make their own food. Some animals eat plants (these animals are called ______________________________________), some animals eat other animals (these animals are called ______________________________________), and some animals eat both plants and animals (these animals are called ______________________________________).

A food chain is the sequence of who eats whom in a biological community to obtain nutrition.

  1. A food chain starts with the primary ______________________________________ source, usually the sun or deep _______________________________ vents.
  2. The next link in the chain is an organism that make its own food from the primary energy source -- an example is plants that make their own food from sunlight (using a process called ______________________________________). These organisms are called autotrophs or primary producers.
  3. Next come organisms that eat autotrophs; these organisms are called herbivores or primary ______________________________________ -- an example is a rabbit that eats ______________________________________.
  4. The next link in the chain is animals that eat herbivores; these are called secondary consumers -- an example is a snake that eats rabbits.
  5. In turn, these animals are eaten by tertiary consumers -- an example is an owl that eats ______________________________________.
  6. The tertiary consumers are are eaten by quaternary consumers -- an example is a hawk that eats owls.
  7. Each food chain end with a ______________________________________ predator, an animal with no natural enemies (some examples are alligators, hawks, and polar ______________________________________).
  8. When any organism dies, it is eventually eaten by ______________________________________ (like vultures, worms and crabs) and broken down by decomposers (mostly bacteria and fungi), and the exchange of energy continues.

The ______________________________________ in a food chain show the flow of energy, usually from the sun to a top predator. As the energy flows from organism to organism, energy is ______________________________________ at each step.

Some organisms' position in the food chain can vary as their diet differs. For example, when a bear eats berries, the bear is acting as a primary consumer. When a bear eats a plant-eating rodent, the bear is functioning as a secondary consumer. When the bear eats salmon, the bear is functioning as a tertiary consumer (this is because salmon is a secondary consumer, since salmon eat herring that eat zooplankton that eat phytoplankton, that make their own energy from sunlight). Think about how people's place in the food chain varies - often within a single ______________________________________.



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