PRETEST: Ecosystems

an area that tends to receive little rain and has extreme temperatures with very hot days and cool nights

• desert

• tundra

• grassland

a large system of animals, plants, and organisms that live together in a particular space

• ecosystem

• habitat

• microhabitat

a treeless wetland with tall grasses

• marsh

• swamp

• wetland

a wetland with tall trees and thick vines

• swamp

• marsh

• lake

an area where the ground is covered by water most of the year

• wetland

• marsh

• swamp

A/An ________ is a large system of plants, animals, and organisms as well as the types of climate and landforms in which they live.

• land ecosystems

• savannas

• estuary

________ are tropical grasslands that have clumps of trees and many grasses.

• Grasslands

• Savannas

• Land ecosystems

A/An ________ is a body of water that forms when freshwater from a river or stream mixes with salt water from a bay or ocean.

• coral reef

• estuary

• lake

________ is the frozen layer of soils below the top layer of the ground in the tundra.

• Permafrost

• An estuary

• An ecosystem

________ ecosystems are the most diverse ecosystems, containing a variety of plants, fish & marine animals.

• Coral reef

• Water

• Ocean