Hard Science Crossword
Puzzle #15 • 15×15 grid
6
1
6
6
2
6
7
9
6
7
8
9
6
7
8
9
10
7
3
8
10
7
8
10
7
4
7
5
Across
1.Element in all life
2.Vibration traveling through air
3.Group of bonded atoms
4.Smallest unit of matter
5.Electromagnetic radiation
Down
6.Preserved ancient remains
7.Slow moving ice mass
8.Earth's natural satellite
9.Our solar system's star
10.Genetic blueprint molecule