Curated OER
Geysers, Hot springs, and Bushfires
In this earth science learning exercise, students locate thirty-two terms about the environment. Answers are available in various formats.
Wikimedia
Wikipedia: Hot Spring
This website from the encyclopedia Wikipedia contains a definition for what a hot spring is, and tells how they differ from a geyser. Links are also provided throughout for additional information on related subjects.
Science Struck
Science Struck: Properties and Uses of Gypsum
Read about gypsum, where it is found, how it forms, its properties, and its many uses.