Hard Science Crossword
Puzzle #18 • 15×15 grid
9
1
9
6
9
6
8
9
6
2
8
9
6
8
9
7
8
9
3
7
8
7
7
4
7
10
7
10
10
5
Across
1.Smallest unit of matter
2.Luminous celestial object
3.Negatively charged particle
4.Vibration traveling through air
5.Genetic blueprint molecule
Down
6.Earth's natural satellite
7.Gas we breathe
8.H2O liquid
9.Force pulling objects together
10.Our solar system's star