What is the difference between sleet and hail?

Question Answered by Tim Axford, Meterologist, National Weather Service-Pocatello, ID. HAIL Usually occurs during the spring and summer but could occur during all seasons. When thunderstorms form, air moves from near the ground up into the sky, sometimes as high as 50,000 ft up! This air moving upwards will carry drops of water with it.…

When getting coffee, the people at Starbucks ask, “Do you want to leave room for sugar and cream?” Do I need to leave space if I just add sugar?

Question answered by Catherine Riddle, PhD, Radiochemist, Idaho National Laboratory The chemistry of coffee is complex to start with so adding sugar, milk or both makes it even more so. There are many systems at work in a cup of coffee including density, inter-molecular spacing, temperature and concentration. Believe it or not, there is a…

Is coal a sedimentary rock?

Answered by Kurt Edwards, Geologist and GIS Analyst, INL ESER Program he short answer is yes, coal is a sedimentary rock. Coal is formed mainly from plant material that accumulates in a swampy environment. These plants that become coal, lived before and during the time of the dinosaurs. When the plants died they would sink…