横向
1
Gas essential for breathing
2
Measure of matter in an object
4
Push or pull on an object
6
Unit of heredity
8
Glass that splits light into spectrum
9
Disturbance that transfers energy
纵向
2
Naturally occurring inorganic solid
3
Icy body with a tail near the sun
5
Unit of energy
7
Force that attracts objects together
10
Fourth state of matter
11
Our home planet
12
Chemical element in table salt
13
Nerve cell in the brain