Expert Science Crossword
Puzzle #21 • 19×19 grid
1
7
7
9
7
9
2
7
9
7
9
7
9
3
7
9
10
9
10
11
4
9
10
11
12
10
11
12
8
10
11
12
8
5
11
8
11
8
11
6
8
11
8
Across
1.Our solar system's star
2.Smallest unit of matter
3.Electromagnetic radiation
4.Vibration traveling through air
5.Force pulling objects together
6.Capacity to do work
Down
7.Mountain that erupts lava
8.Preserved ancient remains
9.Group of bonded atoms
10.Push or pull on an object
11.Negatively charged particle
12.Genetic blueprint molecule