Surface water that flows over the land and into rivers and streams.
What is runoff?
100
A large stream of water flowing in oceans, in rivers and in some large lakes.
What is a current?
100
A ridge that separates drainage basins is called this.
What is a divide?
100
River that joins another river of equal or greater size.
What is a tributary?
100
The water cycle is powered by.
What is the sun?
200
The part of a continent that extends underwater is this.
What is a continental shelf?
200
The movement of water between the atmosphere and the Earth's surface.
What is the water cycle?
200
The top of the groundwater layer?
What is water table?
200
Tiny organisms that live at or near the ocean floor.
What are plankton?
200
40% of the US is covered by the ____________ drainage basin.
What is the Mississippi-Missouri River basin?
300
An artificial lake made by constructing dams along rivers.
What are reservoirs?
300
Water that runs over the earth's surface and flows into streams.
What is runoff?
300
Organisms that live on the ocean floor.
What are benthos?
300
What percent of the earth is fresh water?
What is 3%?
300
Where does the dissolved salt in the ocean come from?
What are rocks on the ocean floor and from incoming river water?
400
A spring that shoots water into the air.
What is a geyser?
400
A funnel-shaped depression that results when the roof of a cave collapses.
What is a sinkhole?
400
Deep valley on the ocean floor.
What is a trench?
400
Regular up and down motion of water caused by wind energy moving through the water.
What is a wave?
400
What are 3 features of the ocean floor?
What is continental shelves, continental slopes, mid-ocean ridges, trenches, seamounts, islands and plains.
500
Land area that is drained by a river and its tributaries.
What is a drainage basin?
500
Free-swimming ocean animals are called?
What are nekton?
500
Underwater mountain that is usually a volcano.
What is seamount?
500
A layer of the ocean where the temperature drops sharply is.
What is thermocline?
500
What is the difference between salt water and fresh water?
What is salt water is too salty to drink or to use in farming or industry. Fresh water does not contain salt and can be easily treated for use in drinking, watering plants, and operating machinery.