1
height above sea level
2
a person who has had a lot of experience of a particular activity
3
to move very fast, especially in a way that seems dangerous
4
a violent attack
5
the degree to which people keep themselves or their environment clean, especially to prevent disease
6
to follow a curved path around a planet or star
7
not loud, bright, noticeable, or obvious in any way
8
to play..............,with to destroy or damage something
9
a very small mark, piece, or amount
10
an opening through a wall, floor, etc., or the cover for it
