Exploring Evaporation
Investigate the phenomenon of evaporation under a variety of conditions.
Ohaus ScoutTM II Balance
(model #SR2020)
Lab Summary
Students will investigate the phenomenon of evaporation under a variety of conditions.
Evaporation, the process by which liquid water is converted into a gaseous state, is a critical part of Earth's water cycle. Water vapor enters Earth's atmosphere via evaporation from puddles, ponds, streams, rivers, lakes and oceans. The water vapor is then returned to the Earth's surface as precipitation.
The rate of evaporation increases with a rise in air and water temperatures. The evaporation rate also increases with an increase in wind and solar radiation since warmer air can hold more moisture.
Hypothesize: How quickly will mass measurements change as evaporation occurs?
Published: April 2003
Downloads
- Exploring Evaporation (23 KB, .zip)
Includes experiment setup and procedures
Here's What You Need
U.S. Educator prices shown.
OHAUS Scout Pro Balance 200g (SE-8823) - $342
Ideal for student labs and can be easily connected to DataStudio for data analysis.
Other Materials
- shallow dish (i.e. Petri dish)
- tap water, approximately 50 mL
- optional: covers for dish: paper towel, wax paper, watch glass, etc.
- optional: Temperature Sensor (PS-2125) and Xplorer datalogger (PS-2000)