1. How many earthquakes does it take to build a mountain? [Topic: Earthquakes]

2. Are GPS measurements accurate or precise? [Topic: GPS]
3. What is a rate? [Topic: GPS]
4. How far away are satellites? [Topic: GPS]
5. How fast is the Jet Propulsion Laboratory's station moving? [Topic: SCIGN]
6. How long will it take for Los Angeles and San Francisco to meet? [Topic:SCIGN]

Last modified on 8/12/98 by Maggi Glasscoe (scignedu@jpl.nasa.gov)