Misc: what sort of athletes do sit spins, axel jumps and flying camels?

Questions

A two-bit moon is in its ---------- quarter.?

A wind with a speed of ---------- miles or more is designated a hurricane.?

About ---------- cars are junked each year in the U.S.?

According to the Gemological Institute of America, up until 1896, India was the only source for ---------- to the world.?

All snow crystals are---------- .?