横向
1
Our home planet
3
Tissue that contracts for movement
4
Fourth state of matter
6
Unit of heredity
8
Magnetic metallic element
11
Molten rock beneath Earth surface
纵向
2
Group of similar cells
3
Naturally occurring inorganic solid
4
Positive particle in nucleus
5
Unit of energy
7
The Red Planet
9
Second lightest element
10
Push or pull on an object
12
Disturbance that transfers energy