横向
1
Our home planet
3
Magnetic metallic element
4
Preserved remains of ancient life
5
Naturally occurring inorganic solid
7
Reddish electrical conductor
10
Smallest unit of an element
纵向
2
Substance with pH below 7
4
Push or pull on an object
6
Fourth state of matter
7
Element found in all living things
8
Ball of burning gas in space
9
Gas essential for breathing