横向
1
Unit of energy
4
Curved glass that refracts light
5
Unit of force
6
Second lightest element
8
The Red Planet
13
Tissue that contracts for movement
纵向
2
Naturally occurring inorganic solid
3
Natural satellite of Earth
7
Element found in all living things
9
Compound containing oxygen
10
Center of an atom or cell
11
Our home planet
12
Measure of matter in an object