横向
1
Group of similar cells
4
Icy body with a tail near the sun
5
Precious yellow metallic element
6
Curved glass that refracts light
7
The Red Planet
9
Particle of light
10
Unit of electric potential
纵向
2
Unit of force
3
Substance with pH above 7
4
Basic unit of life
5
Force that attracts objects together
8
Unit of energy