2 - HYDROSPHERE Flashcards
Our planet’s surface is dominated by water; over _____ of the surface of the earth is covered by liquid water, in oceans and lakes, and solid water, in the ice of glaciers, icecaps, and sea ice.
70 percent
the fall of liquid or solid (ice) water from the atmosphere to reach the Earth ’s land or ocean surface.
Precipitation
a chemical compound of hydrogen and oxygen.
water molecule (H2O)
- The attraction between individual water molecules creates a bond known as a
hydrogen bond.
a force that acts to reduce the surface area of a liquid.
- Surface Tension
how much heat energy is needed raise the temperature of a substance.
- Specific Heat
THREE STATES OF WATER
as a solid (ice)
liquid (water)
invisible gas (water vapor)
absorbed and held in storage in a gas or liquid during the processes of evaporation, melting, or sublimation; energy released in condensation, freezing, or deposition.
- Latent Heat Energy
- flow of latent heat that results when water absorbs energy from its surroundings and changes from a liquid or solid to a gas and then later releases that energy to new surroundings by condensation or deposition.
- Latent Heat Transfer
CHANGES OF THE STATE OF WATER
Evaporation
Melting
Freezing
Condensation
Sublimation
Deposition
process by which water in a liquid state passes into the vapor state.
- Evaporation
change from solid state to liquid state, accompanied by absorption of energy from the surroundings that is stored as latent heat.
- Melting
change from liquid to solid state, accompanied by release of latent heat energy.
- Freezing
process of change of matter in the gaseous state (water vapor) to the liquid state (liquid water) or solid state (ice).
- Condensation
process of change of ice (solid state) to water vapor (gaseous state).
- Sublimation
change of state of a substance from a gas (water vapor) to a solid (ice).
- Deposition
the amount of energy needed to raise the temperature of 1 gram (g) of water through 1° Celsius.
- Calorie
- World Oceans
97.2%
- Fresh Water
2.8%
o Ice sheets and glaciers
2.15%
o Groundwater
0.63%
describes the global flow of water to and from oceans, land, and atmosphere. Water moves by evaporation, precipitation, and runoff.
hydrologic cycle
evaporative loss of water to the atmosphere from leaf pores of plants.
- Transpiration
refers to the amount of water vapor present in the air. Warm air can hold much more water vapor than cold air.
- Humidity
gaseous state of water.
- Water Vapor