Across
1
Path of a planet around the sun
4
Unit of force
5
Unit of energy
7
Force that attracts objects together
10
Disturbance that transfers energy
Down
1
Gas essential for breathing
2
Ball of burning gas in space
3
Magnetic metallic element
6
Blocking of light by a celestial body
8
Measure of matter in an object
9
Push or pull on an object