Across
1
Ball of burning gas in space
3
Preserved remains of ancient life
5
Amplified beam of light
6
Reddish electrical conductor
7
Tissue that contracts for movement
10
Unit of power
Down
1
Chemical element in table salt
2
Path of a planet around the sun
4
Second lightest element
6
Basic unit of life
8
Unit of force
9
Force that attracts objects together