 |
NASA | GSFC | JPL | Site Map |
|
|
 |
 |
 |
Education: Student Outcomes |
Filtered by outcome, asset type: 0-4q1, activity Click here to begin a new search | ||||
Outcome: Explain that evaporation can separate the water from the salt in salt water. | ||||
Grade level: K-4 Theme: water cycle Activity: http://aquarius.nasa.gov/evap_invest.html Big Idea Water can "disappear" or evaporate into the air.
Key Concepts Evaporation occurs when a liquid is changed into a gas.
Rate of evaporation increases when the temperature of a liquid is increased.
Water moves around our planet in the water cycle.
Background Evaporation is the process by which water changes from a liquid to a gas or vapor. Evaporation is the primary pathway that water moves from the liquid state back into the water cycle as atmospheric water vapor. Studies have shown that the oceans, seas, lakes, and rivers provide nearly 90 percent of the moisture in the atmosphere via evaporation, with the remaining 10 percent being contributed by plant transpiration. |
