Science Focus 8 - Unit 5 Definitions
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Questions and Answers

What is salt water?

Water such as sea water with a high salt content.

What is fresh water?

Water from sources such as lakes, rivers, ponds, and wells that contain a low amount of dissolved salts.

What is the water cycle?

The process in which nearly all water on Earth moves continuously between the oceans, land, and atmosphere.

What does water quantity refer to?

<p>The amount of water.</p> Signup and view all the answers

What is water quality?

<p>The characteristics of a water resource that make it suitable or unsuitable for various uses.</p> Signup and view all the answers

What is a glacier?

<p>A large moving mass of compressed snow and ice.</p> Signup and view all the answers

What is an ice cap?

<p>A large dome-shaped glacier that flows outwards from its center and covers a large area, especially of land.</p> Signup and view all the answers

What is an ice field?

<p>An area that feeds two or more glaciers.</p> Signup and view all the answers

What is a valley glacier?

<p>A glacier that forms between mountain ranges.</p> Signup and view all the answers

What is a continental glacier?

<p>A glacier or ice sheet covering all or most of a continent.</p> Signup and view all the answers

What is an ice fall?

<p>A frozen waterfall made when a glacier flows over a steep cliff.</p> Signup and view all the answers

What is a crevasse?

<p>A deep fissure, or crack in ice.</p> Signup and view all the answers

What is pack ice?

<p>A floating sheet of ice rarely more than 5 m thick that breaks easily.</p> Signup and view all the answers

What are icebergs?

<p>Large chunks of floating ice that break loose or calve from continental glaciers as the glaciers flow down slope in the ocean.</p> Signup and view all the answers

What does calve mean?

<p>When large chunks of ice break off the edge of a glacier and become icebergs.</p> Signup and view all the answers

What are striations?

<p>Scratches made in rocks by rocks carried in glaciers.</p> Signup and view all the answers

What are cirques?

<p>Bowl-shaped basins eroded by valley glaciers.</p> Signup and view all the answers

What is an arête?

<p>A mountain ridge carved by two or more glaciers from several directions.</p> Signup and view all the answers

What is a horn?

<p>A sharp mountain peak carved by glaciers.</p> Signup and view all the answers

What is till?

<p>Unsorted material deposited by a glacier.</p> Signup and view all the answers

What is a moraine?

<p>A landform made of glacier till.</p> Signup and view all the answers

What is outwash?

<p>Material deposited by the melt water of a glacier.</p> Signup and view all the answers

What is an esker?

<p>A winding ridge made of sand and gravel formed by streams that flow beneath a glacier.</p> Signup and view all the answers

What is meltwater?

<p>The run-off from melting snow.</p> Signup and view all the answers

What is a millwell?

<p>A rounded hole in the ice formed by a stream as it melts its way downward through the ice.</p> Signup and view all the answers

What are ice ages?

<p>Any of the major periods when glaciers covered most of Earth.</p> Signup and view all the answers

What is surface water?

<p>Fresh water system above ground, including streams, rivers, wetlands, and lakes.</p> Signup and view all the answers

What is groundwater?

<p>The water that has seeped down under Earth's surface to a depth of about 100m.</p> Signup and view all the answers

What does clarity refer to in the context of water?

<p>A measure of how clear something is, including water; determined by the amount of matter suspended in it.</p> Signup and view all the answers

What are wetlands?

<p>Areas such as swamps, marshes, and bogs occurring in low areas; important habitats for many species of plants and animals.</p> Signup and view all the answers

What are streams?

<p>Small, fast-flowing bodies of water.</p> Signup and view all the answers

What are rivers?

<p>Large, fast-flowing bodies of water.</p> Signup and view all the answers

What is a watershed?

<p>Area of land that drains into a body of water.</p> Signup and view all the answers

What is run-off?

<p>Rainwater that flows off a land surface.</p> Signup and view all the answers

What is a continental divide?

<p>In North America, the continuous ridge of mountain summits dividing the continent into two main drainage areas.</p> Signup and view all the answers

What are headwaters?

<p>The source of a watershed.</p> Signup and view all the answers

What is outflow?

<p>The water that flows out of a watershed.</p> Signup and view all the answers

What is erosion?

<p>The movement of sediments from one place to another.</p> Signup and view all the answers

What is deposition?

<p>The process in which eroded material is dropped or left.</p> Signup and view all the answers

What is streamflow?

<p>The speed and amount of water discharged by a watershed.</p> Signup and view all the answers

What does permeable mean?

<p>Allowing materials to pass through.</p> Signup and view all the answers

Study Notes

Water Types

  • Salt water: High salt content, primarily found in oceans.
  • Fresh water: Low dissolved salt content, sourced from lakes, rivers, ponds, and wells.

Water Movement and Quality

  • Water cycle: Continuous movement of water between oceans, land, and atmosphere.
  • Water quantity: Refers to the overall amount of water present in a given area.
  • Water quality: Determines suitability for use based on various characteristics.

Glaciers and Ice Formations

  • Glacier: Large mass of moving compressed snow and ice.
  • Ice cap: Dome-shaped glacier covering substantial land areas, flowing outward.
  • Ice field: An area that supplies multiple glaciers.

Types of Glaciers

  • Valley glacier: Located between mountain ranges.
  • Continental glacier: Thick ice sheet covering a continent.

Glacier Dynamics

  • Ice fall: A glacier flow over a steep cliff resembles a frozen waterfall.
  • Crevasse: Deep cracks formed in ice due to movement.
  • Pack ice: Floating ice sheets, seldom exceeding 5 meters thick, break easily.

Icebergs and Calving

  • Icebergs: Large floating ice chunks that break off from glaciers.
  • Calve: The process of large ice chunks breaking off a glacier.

Erosion and Geological Features

  • Striations: Scratches on rock surfaces caused by glacier movement.
  • Cirques: Bowl-shaped depressions created by valley glaciers.
  • Arete: Sharp mountain ridges formed by multiple glaciers.
  • Horn: Pointed mountain peaks created through glacial activity.

Depositional Features

  • Till: Unsorted materials deposited by glacier movement.
  • Moraine: Landform created from glacier till.
  • Outwash: Material laid down by glacier meltwater.
  • Esker: Sand and gravel ridge formed by streams beneath glaciers.

Water Sources and Distribution

  • Meltwater: Water runoff from melting snow.
  • Surface water: Freshwater bodies above ground, like streams and lakes.
  • Ground water: Water that has seeped below the Earth's surface, typically found up to 100 meters deep.

Water Clarity and Habitats

  • Clarity: A measure of water transparency based on suspended materials.
  • Wetlands: Low-lying areas that support diverse plant and animal life, including marshes and swamps.

Streams and Rivers

  • Streams: Small, rapidly moving bodies of water.
  • Rivers: Larger and faster moving than streams.

Watershed Dynamics

  • Watershed: Land area draining into a water body.
  • Run-off: Rainwater that flows across the land surface into water bodies.
  • Continental divide: Ridge marking the split between drainage areas, directing rivers to different oceans.

Erosion and Deposition Processes

  • Headwaters: Source points of a watershed.
  • Outflow: Water exiting a watershed.
  • Erosion: Movement of sediments from one location to another.
  • Deposition: Process where eroded materials are left behind.

Water Flow Characteristics

  • Streamflow: Refers to the speed and volume of water passing through a watershed.
  • Permeable: Capability of allowing materials, including water, to pass through.

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Test your knowledge on key terms from Unit 5 of Science Focus 8. This quiz covers essential definitions related to water types and the water cycle, helping you better understand these important concepts in science. Prepare to strengthen your vocabulary and comprehension of this unit!

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