Across
1
Chemical element in table salt
3
Element found in all living things
4
Blocking of light by a celestial body
5
Path of a planet around the sun
9
Substance with pH below 7
11
Icy body with a tail near the sun
Down
2
Particle of light
3
Basic unit of life
5
Gas essential for breathing
6
Force that attracts objects together
7
Molten rock beneath Earth surface
8
Measure of matter in an object
10
Precious yellow metallic element