Across
1
Measure of matter in an object
2
Force that attracts objects together
4
Gas form of a liquid
6
Tissue that contracts for movement
8
Basic unit of life
10
Ball of burning gas in space
Down
1
Molten rock beneath Earth surface
3
Center of an atom or cell
4
Infectious microscopic agent
5
Path of a planet around the sun
7
Smallest unit of an element
9
Amplified beam of light