横向
1
Substance with pH below 7
3
Push or pull on an object
6
Unit of force
8
Smallest unit of an element
10
Ball of burning gas in space
11
Disturbance that transfers energy
纵向
2
Element found in all living things
4
Form of thermal energy
5
Path of a planet around the sun
7
Absolute temperature scale unit
9
Molten rock beneath Earth surface