Water Everywhere (water cycle, freshwater distribution)
Terms in this set (15)
Water cycle (Definition)
Continuous movement of water within the earth and atmosphere. Movement of earths water
(solid, liquid, gas)
- Powered by the sun
- Liquid to gas
- Atmospheric water vapor
- Driven by the sun
- It is also helped by wind and air temperature
- Gas goes up into clouds
- A change of state from a gas to a liquid due to a cooling or compression.
- Gas molecules that were once warm and spread out quickly become cooler and more close together
- Formation of clouds
- Rain, snow, sleet, or hail that falls to the ground.
- How water is cycled from the atmosphere to the earth
Evaporation of water from soil plus transpiration from plants. Correlates with species richness.
- Solid to gas
- Bypasses liquid state
- e.i Snow into water vapor
Global Water Distribution
- Freshwater is only 2.5% of earths water
- Out of the 2.5% most of it is frozen or in the atmosphere so we have access to less than 1% of freshwater
What do we do regularly that requires water?
- Bathing, drinking, washing, pets, cars, etc.
- All of these things use fresh water
What do we use salt water for?
- swimming, fishing, boating
- cant's use it for survival
- very hard to turn saltwater into freshwater
Where can we find freshwater in nature? Can we get to all of it?
- lakes, streams, ponds, creeks, underground, glaciers
- Some unavailable- frozen or in the atmosphere(vapor) and we can't get to it
mixture of fresh and salt water
Buoyancy and density
- saltwater more dense than fresh water
- additional molecules packed in the same volume
- freshwater is more buoyant or less dense so it will float
About 97% of water on earth is saltwater
Makes up about 3% of the planets total water supply
- Great Lakes holds about 20% of that water that we can access but most is found in smaller lakes and streams
Glaciers and Groundwater
- 2% is locked up in glaciers or underground aka we can't get to it
- That means that less than 1% is actually accessible to us on the surface