横向
1
Preserved remains of ancient life
4
Particle of light
5
Compound containing oxygen
7
Blocking of light by a celestial body
8
Smallest unit of an element
12
Force that attracts objects together
13
Naturally occurring inorganic solid
纵向
2
Tissue that contracts for movement
3
Second lightest element
6
Curved glass that refracts light
9
Element found in all living things
10
Icy body with a tail near the sun
11
Biological catalyst
14
Path of a planet around the sun