ദ്ദി ≽^⎚˕⎚^≼ .ᐟ lesson 9: earth's water resources

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13 Terms

1

water cycle

  1. evaporation

  2. condensation

  3. precipitation

  4. runoff

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2

Evaporation

  • water changes from a liquid to a gas or vapor.

  • occurs when the sun heats up the surface of bodies of water, such as oceans, lakes, and rivers.

  • Water can also evaporate from plants through a process called transpiration.

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3

Condensation

  • water vapor in the air cools and changes back into a liquid.

  • forms clouds in the atmosphere, which are made up of tiny water droplets.

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4

Precipitation

  • This is when water falls from the atmosphere to the surface of the Earth in the form of rain, snow, sleet, or hail.

  • This occurs when the clouds become too heavy with water droplets and gravity pulls them down to the ground.

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5

Runoff

  • this is the movement of water across the land surface, either as sheet flow, channels or underground streams.

  • The _____ either seeps into the ground, eventually returning to the ocean or flows into rivers and streams, eventually returning to the ocean.

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6

TYPES OF WATER RESOURCES:

  1. freshwater

  2. saltwater

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7

freshwater

  • contains low concentration of dissolved salts and is typically found in lakes, rivers, groundwater, and ice caps.

  • vital resource for human and animal consumption, agriculture, and various industrial uses.

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8

saltwater

  • contains high concentration of dissolved salts, such as sodium and chloride, and is typically found in oceans, seas, saltwater, and lakes.

  • covers approximately 97% of the earth’s water resources and is an important ecosystem for marine life.

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9

SURFACE WATER

  • This is water that is found in lakes, rivers, streams, and other bodies of water on the Earth's surface.

  • _____ is often used for drinking water, irrigation, and recreation.

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10

GROUND WATER

  • This is water that is found underground in the spaces between soil particles and rocks.

  • _____ is accessed through wells or springs and is often used for drinking water, irrigation, and industrial purposes.

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11

ATMOSPHERIC WATER

  • This is water that is found in the atmosphere in the form of water vapor.

  • _____ is important for the water cycle because it contributes to the formation of clouds and precipitation.

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12

WATER SCARCITY

  • It is a pressing global issue that occurs when the demand for water exceeds the available supply.

  • This can be caused by a variety of factors, including population growth, climate change, overuse of water resources, and pollution.

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13

SUSTAINABLE WATER MANAGEMENT

  • practice of managing water resources in a way that meets the needs of current and future generations while ensuring the long-term health of the ecosystem.

  • It involves balancing competing demands for water, such as agriculture, industry, and human consumption.

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