横向
1
Preserved remains of ancient life
4
Positive particle in nucleus
5
Force that attracts objects together
10
Element found in all living things
11
Magnetic metallic element
12
Hottest planet in solar system
纵向
2
Nerve cell in the brain
3
Chemical element in table salt
5
Unit of heredity
6
Gas form of a liquid
7
Tissue that contracts for movement
8
Our home planet
9
Substance with pH below 7