横向
1
Substance with pH below 7
4
Naturally occurring inorganic solid
5
Measure of matter in an object
7
Gas form of a liquid
8
Reddish electrical conductor
12
Our home planet
13
The Red Planet
纵向
2
Compound containing oxygen
3
Amplified beam of light
6
Smallest unit of an element
7
Unit of electric potential
9
Element found in all living things
10
Unit of heredity
11
Glass that splits light into spectrum