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What is 1 + 3?
Every organism needs to obtain energy in order to live. Plants get their energy from the ____ and make their own food.
animals that eat plants
animals that eat other animals
animals that eat plants and animals
A food chain starts with the primary _______ source, usually the sun or deep ______ vents.
The next link in the chain is an organism that makes its own food from the privary energy source--an example is plants that make their own food from sunlight ________
Next come organisms that eat autotrophs; these organisms are called herbivores or primary ______-an example is a rabbit that eats _________
the next link in the chain is animals that eat herbivores; these are called secondary consumers--an example is a snake that eats rabbits
in turn these animals are eaten by tertiary consumers--an example is a hawk that eats owls
Each food chain ends with a ____predator, an animal with no natural enemies (alligators, hawks, polar ____)
When any organism dies, it is eventually eaten by ______ (vultures, worms and crabs) and broken down by decomposers (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