Triva answers

Good guesses all round. Close on some. Others not so much. They don't get easier. And I will try to word them so look-ups won't be easy, next time.
1. Errol Flynn
2. Mt. Everest
3. Hawaii (Extra credit for Edie's explanation).
4. Olympus Mons (on Mars, Jupiter is a gas giant. No known mountains).
5. Bicycle
6. C= CONSTANT. The speed of light in a vacuum never changes.
7. fibonacci sequence
8. Water. It is the only substance that expands when chilled. (Unique Covalent bonding).Steve BZ.
9. Luna. Or The Moon. (check the definition of satellite).
10. Ovine.