横向
1
Tissue that contracts for movement
3
Molten rock beneath Earth surface
5
Chemical element in table salt
7
Unit of force
8
Reddish electrical conductor
9
Fourth state of matter
11
Group of similar cells
12
Gas form of a liquid
纵向
1
The Red Planet
2
Gas essential for breathing
4
Center of an atom or cell
6
Second lightest element
8
Solid with repeating atomic pattern
10
Smallest unit of an element