Hard Science Crossword
Puzzle #30 • 15×15 grid
7
1
6
7
8
6
7
8
6
7
2
6
7
8
6
9
6
3
9
6
9
10
6
9
10
4
9
10
9
10
10
5
10
Across
1.Earth's natural satellite
2.Our solar system's star
3.Slow moving ice mass
4.Luminous celestial object
5.Vibration traveling through air
Down
6.Negatively charged particle
7.Electromagnetic radiation
8.Basic unit of life
9.Element in all life
10.Gas we breathe