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Ecosystems
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21
Science
3rd Grade
09/15/2013

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Term
Environment
Definition
It includes all the nonliving things that surround a living thing.
Term
What are some examples of the environment?
Definition
Water, air, sunlight, soil, and the temperature
Term
Ecosystem
Definition
It is all the living and nonliving things in a certain area.
It can be big or small.
Term
Population
Definition
It is all the plants or animals of the same kind that live in an ecosystem.
Term
Habitat
Definition
The habitat is where each population lives in the ecosystem.
Term
Community
Definition
All the different populations make up a community which includes all the living things in the ecosystem.
Term
What are the three main groups of living things?
Definition
Consumers, producers, and decomposers
Term
Who are the producers?
Definition
Plants
Term
Who are the consumers?
Definition
People and animals
Term
Who are the decomposers and what do they do?
Definition
Decomposers help break down dead things and wastes.
Bacteria, mold, mushrooms, and earthworms
Term
Herbivores
Definition
Animals that eat only plants.
Term
Omnivores
Definition
Consumers that eat both plants and animals. (Bears, skunks, and robins)
Term
Carnivores
Definition
Consumers that eat only animals.(wolves, weasels, and tigers)
Term
What do living things do?
Definition
Grow, reproduce, and interact
Term
What do Food Chains and Food webs show?
Definition
They show how energy moves through an ecosystem.
Term
If one part of the food web changes, does it affect the whole food web?
Definition
Yes
Term
Predator
Definition
Any animal that hunts and eats other animals.
Term
Prey
Definition
The animals that a predator hunts for.
Term
Food web
Definition
The food web is made up of several food chains linked together.
Term
Does the ecosystem change?
Definition
Yes
Term
What can change the ecosystem?
Definition
People, population, disease, animals, and the environment(extra water, drought, lightning)
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