knowt ap exam guide logo

Water Cycle

Water Cycle

The water cycle, also known as the hydrologic cycle, is the continuous movement of water on, above, and below the surface of the Earth. It involves the processes of evaporation, condensation, precipitation, and transpiration.

Evaporation

  • Evaporation is the process by which water changes from a liquid to a gas or vapor.

  • It occurs when the sun heats up water bodies such as oceans, lakes, and rivers, causing the water to turn into water vapor and rise into the atmosphere.

Condensation

  • Condensation is the process by which water vapor changes into liquid water.

  • It occurs when the water vapor in the atmosphere cools down and forms clouds.

Precipitation

  • Precipitation is the process by which water falls from the atmosphere to the Earth's surface.

  • It can occur in the form of rain, snow, sleet, or hail.

Transpiration

  • Transpiration is the process by which water is released into the atmosphere by plants.

  • It occurs when plants absorb water from the soil through their roots and release it into the air through small pores in their leaves.

Importance of the Water Cycle

  • The water cycle is essential for the survival of all living organisms on Earth.

  • It helps to regulate the Earth's temperature and climate.

  • It also plays a crucial role in the distribution of freshwater resources around the world.

HW

Water Cycle

Water Cycle

The water cycle, also known as the hydrologic cycle, is the continuous movement of water on, above, and below the surface of the Earth. It involves the processes of evaporation, condensation, precipitation, and transpiration.

Evaporation

  • Evaporation is the process by which water changes from a liquid to a gas or vapor.

  • It occurs when the sun heats up water bodies such as oceans, lakes, and rivers, causing the water to turn into water vapor and rise into the atmosphere.

Condensation

  • Condensation is the process by which water vapor changes into liquid water.

  • It occurs when the water vapor in the atmosphere cools down and forms clouds.

Precipitation

  • Precipitation is the process by which water falls from the atmosphere to the Earth's surface.

  • It can occur in the form of rain, snow, sleet, or hail.

Transpiration

  • Transpiration is the process by which water is released into the atmosphere by plants.

  • It occurs when plants absorb water from the soil through their roots and release it into the air through small pores in their leaves.

Importance of the Water Cycle

  • The water cycle is essential for the survival of all living organisms on Earth.

  • It helps to regulate the Earth's temperature and climate.

  • It also plays a crucial role in the distribution of freshwater resources around the world.