American Geosciences Institute
American Geosciences Institute: Earth Science Week: Look Up! Observing Weather
To get a better idea of how meteorologists make weather predictions, students will begin their own weather journals and make rain gauges.
Other
Bigelow Laboratory for Ocean Sciences: Salinity and Deep Ocean Currents
For this activity, students will investigate how temperature and currents affect the salinity of ocean water, making predictions after studying ocean maps. It is recommended that teachers do the experiment themselves before presenting it...
Bill Nye
Bill Nye: Barometer in a Bottle
This tutorial by Bill Nye explains how to make a simple barometer using a jar and a balloon. The barometer is an old and accurate first look at predicting the weather by examining the pressure of the atmosphere. Discover how atmospheric...
McGraw Hill
Glencoe Publishing: Practicing Scientific Processes
This site from Glencoe Publishing not only explains hypothesis but also tells how to design an experiment to test your hypothesis. Includes the difficult task of "Separating and controlling variables."