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20 terms

3rd Grade Science Chapter 3 Living things in Ecosystems

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Ecosystem
The living and nonliving things that share an environment and interact.

Organisms depend on each other, like plants depend on sunlight and living things depend on each other.
How are ecosystems different/similar.
How are forest and desert different? How are they similar? Tropical Rainforest soil is not rich in nutrients because plants quickly absorb nutrients.
Habitat
The home of a living thing. A coral reef is an example
Food Chain
A series of organisms that depend on one another for food.
Producer
An organism, such as a plant, that makes its own food.
They get their energy from the sun. Green Plants, Algea are examples.
Consumer
An animal that eats plants or other animals. Eagles eat fish, snakes, and other small animals, .
Decomposer
An organism that breaks down dead plant and animal material.
Food web
Several food chains that are connected.
Climate
The pattern of weather at a certain place over a long time.
Soil
A mixture of minerals, weathered rocks, and decayed plant and animal matter.
desert
A sandy or rocky ecosystem with little rainfall and little plant life.
forest
An ecosystem with many trees.
ocean
A large body of salt water.
wetland
An ecosystem where water covers the soil for most of the year.
adaptation
a structure or behavoir that helps a living thing survuve in its environment. like camaflage or mimicry
camouflage
An adaption that allows an organism to blend into its surroundings.
nocturnal
An adaption in which an animal is active during the night and asleep during the day.
mimicry
an adaption in which one kind of organism looks like anoher kind in color and shape
hibernate
To rest or sleep through the cold weather.
migrate
To move to another place
Why do animals migrate?
when their environment gets too cold, or when food or water is hard to find.