What could happen if earth had two moons? a. there would be more spring tides in a year b. tides would be bigger c. there would be more high tides each day d. all of the above

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.