Moonstone, a moderately hard, transparent or translucent gemstone with a pearly or milky luster. Moonstone is a feldspar, either orthoclase (potassium aluminum silicate) or albite (sodium aluminum silicate). The stone is found in all continents except Africa; the best specimens are mined in Sri Lanka. It is the birthstone for June and represents health.
Chinook, the American name for a warm, dry wind that blows down a mountainside.
We hear about humidity in just about every weather report on the nightly news. There are several different ways meteorologists measure humidity, but relative humidity is the most common measurement. What is relative humidity, though? Find out in this