1.
a creature from another planet
2.
a piece of equipment that makes things that are far away look bigger and nearer
3.
to keep someone safe from something dangerous or bad
4.
a planet is ______ if it is not too close to or far from a sun
5.
to make a place dirty by adding a substance that is dangerous or carries disease
6.
to make something free from bacteria or other living microorganisms
