Water that sinks into the ground instead of running off becomes this.
What is groundwater?
100
A spring that lies close to hot rock or magma is called this.
What is a geyser?
100
River that joins another river?
What is a tributary?
100
About ______% of the earth's water is fresh water?
What is 3%?
100
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?
200
A lake that people make to store a large amount of fresh water is a...
What is a reservoir?
200
The continuous movement of water between the atmosphere and the earth's surface.
What is the water cycle?
200
Underwater mountain, usually a volcano.
What is a seamount?
200
The water cycle is powered by this?
What is the sun?
200
Regular up and down motion of water caused by energy traveling through it is a?
What is wave?
300
An area where runoff drains into a river and its tributaries is a...
What is a drainage basin?
300
This is formed when a cave collapses.
What is a sinkhole?
300
Deep valley on the ocean floor.
What is a trench?
300
Forty percent of the US is covered by the __________ _________ drainage basin.
What is the Mississippi-Missouri drainage basin?
300
Where does the dissolved salt in the ocean come from?
What is from the rocks in the ocean floor and from incoming river water?
400
The part of a continent that extends under an ocean is a...
What is a continental shelf?
400
Surface water that flows into rivers is called this.
What is runoff?
400
A ridge separating drainage basins is...
What is a divide?
400
Organisms living on the ocean floor are...
What is benthos?
400
What are 3 features of the ocean floor?
What is continental shelves, continental slopes, mid-ocean ridges, trenches, seamounts, islands and plains?
500
Ocean _____________ move ocean water from place to place and tend to follow the major wind belts of the earth.
What are currents?
500
Free-swimming ocean animals
What is nekton?
500
Tiny organisms near the ocean surface are called...
What are plankton?
500
Top of the groundwater table is called.
What is a water table?
500
The layer of ocean water where the temperature drops sharply is...