Climate
The Open Sea
Terrestrial Ecosystems
Marine Ecosystems
Freshwater Ecosystems
100

The pattern of atmospheric conditions in an area over periods ranging from at least three decades to thousands of years.

What is climate?

100

This zone is the brightly lit upper zone that contains drifting phytoplankton.

What is the euphotic zone?

100

This is a region's distance from the Equator.

What is latitude?

100

The warm, nutrient-rich, shallow water extending from the high-tide mark on land to the gently sloping, shallow edge of the continental shelf.

What is the coastal zone?

100
Fresh water that flows or is stored in bodies of water on Earth's surface.

What is surface water?

200

Mass movements of surface water driven by winds and shaped by landforms.

What are ocean currents?

200

This is the cold, dark region near the ocean floor.

What is the abyssal zone?

200

The tendency for a transition zone to have greater species diversity and a higher density of organisms than found in either of the individual ecosystems.

What is the edge effect?

200

Where a river meets the sea.

What is an estuary?
200

Surface water that flows into freshwater life zones such as lakes, ponds, inland wetlands, rivers, and streams.

What is runoff?

300

The deflection of a mass as it moves over a spinning surface.

What is the Coriolis effect?

300

This is the zone that receives little sunlight and contains fish that migrate to feed on the surface at night.

What is the bathyal zone?

300

This terrestrial ecosystem is identified by a combination of low rainfall and varying average temperatures.

What is a desert?

300

Water that has a salinity between that of salt water and fresh water.

What is brackish water?

300

The land area that delivers runoff, sediment, and dissolved substances to streams, lakes, or wetlands.

What is a watershed?

400

This refers to drier conditions on the leeward side of mountain ranges.

What is the rain shadow effect?

400

The three vertical zones of the open sea are based on temperatures and this.

What is the degree of penetration of sunlight?

400

This is underground soil where captured water can stay frozen for more than two consecutive years.

What is permafrost?

400

Coastal land areas covered with water all or part of the year.

What are coastal wetlands?

400

The process by which lakes gain nutrients.

What is eutrophication?

500

These are the aquatic equivalents of terrestrial biomes. 

What are aquatic life zones?

500

The showers of dead and decaying organisms that feed most organisms in the abyssal zone.

What is marine snow?

500

Name the four vertical layers of a rain forest.

What are the floor, understory, canopy, and emergent layer?

500

The rising levels of acidity in ocean waters.

What is ocean acidification?

500

A lake that has a small supply of plant nutrients.

What is an oligotrophic lake?