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TEMPERATE FOREST

TROPICAL RAINFOREST

PHYSICAL ENVIRONMENT

GRASSLANDS

HABITAT

DESERT

LIVING ORGANISMS

TUNDRA

MARINE ECOSYSTEM

COMMUNITY

ECOSYSTEM

POPULATION

a large, barren region with no trees which is often very cold

an arid region with little or no vegetation

land covered with grasses and other soft plants but not with bushes and trees

different populations interacting with each other

a living thing that can be split into the five kingdoms

a place where an organism lives

the part of the environment that includes purely physical factors (such as soil, climate, water supply)

forests with tall trees, warm climates, and lots of rain

a community of organisms interacting with its environment

complex of living organisms in the ocean environment

number of organisms of the same species within an ecosystem

area with many trees where the temperatures and seasons vary throughout the year but never to extremes