Across
1
Nerve cell in the brain
5
Disturbance that transfers energy
6
Compound containing oxygen
7
Amplified beam of light
8
Tissue that contracts for movement
9
Infectious microscopic agent
12
Chemical element in table salt
Down
2
Naturally occurring inorganic solid
3
Magnetic metallic element
4
Element found in all living things
10
Our home planet
11
Measure of matter in an object
13
Force that attracts objects together
14
Gas essential for breathing