Science Discovery

公开|
6
3
4
2
1
5
7
8
9

横向

1

Biological catalyst

4

Magnetic metallic element

7

Substance with pH above 7

9

Second lightest element

纵向

2

Form of thermal energy

3

Push or pull on an object

5

The Red Planet

6

Substance with pH below 7

8

Smallest unit of an element