横向
1
Element found in all living things
2
Measure of matter in an object
4
Preserved remains of ancient life
6
Unit of heredity
7
Our home planet
9
Infectious microscopic agent
纵向
2
Tissue that contracts for movement
3
Smallest unit of an element
4
Push or pull on an object
5
Positive particle in nucleus
8
Glass that splits light into spectrum