4th Science Chap. 3 1-2

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4th Science Chap. 3 1-2

A system

is made of many parts that work together for a purpose.

ecosystem

is all the living and nonliving things in an environment and they all work together

population

is all the members of one species that live within an area of an ecosystem

community

different populations that interact with each other in the same area

niche

the specific role an organism has in its habitat

herbivores

consumers who get energy by eating only plants

carnivores

consumers that eat only animals

omnivores

consumers that eat both plants and animals

decomposers

digest the waste and remains of dead plants and animals

Desert System

The driest ecosystem. Some plants and animals have adapted to
the limited water supply. Cactuses, shrubs, coyotes, and roadrunners are this ecosystems organisms.

Grassland

This ecosystem is covered with tall grasses. They receive a medium amount of rain. Grasshoppers, prairie chickens, and bison are
animals that live in this ecosystem of North America.

Tundra

This ecosystem is a cold, dry region. The ground beneath the surface is frozen all year long. Some grasses can grow in a tundra, but trees cannot. In the spring and summer, arctic foxes, caribou, and other animals thrive in these areas.

Forest

This ecosystem is filled with trees, wildflowers, and animals. This area gets more rain than grasslands. Deer, foxes, raccoons, and squirrels often live here.

Tropical Rainforest

This ecosystem is always wet. They get rain year-round. This area supports thousands of species of plants and animals. Colorful birds such as the toucan and beautiful flowers such as the orchid live here.

Consumer

living things that eat other organisms

prey

any animal hunted by others for food

producer

living thing that makes its own food (ex. plants)

Habitat

area or place where an organism lives in an ecosystem

Adaptation

trait that helps a living thing survive in its environment

Food Web

a system of overlapping food chains in which the flow of energy branches out in many directions

Food Chain

the process by which energy moves from one type of living thing to another

Food Chain always begins with?

sunlight

Decay

eventually all living things eventually die and rot

Water Ecosystem

Since almost three-fourths of Earth's surface is covered
with water, many organisms live in here.

...

Organisms that live in the saltwater habitats of oceans are
different from organisms that live in freshwater habitats.

...

The producers in this ecosystem are as large as
bald cypress trees, or as small as single-celled algae.

The Okefenokee Swamp

is a freshwater ecosystem. It is home to many plants, fish, water `birds, and other animals.

Everglades National Park

has both freshwater and saltwater ecosystems. Much of the Everglades is covered with sawgrass. Alligators, fish, water birds, and other animals live here.

Coral reefs

are in shallow ocean areas. All ocean water is salty. Coral reefs have many different organisms. The fish that live in this ecosystem are very colorful.

The deep sea

is another saltwater ecosystem. The organisms here must live without light.

Name 2 things that effect the rate of decay

temperature (cold more slowly, hot more quickly) and moisture

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