Fun Science Puzzle

Public|
3
1
2
5
6
8
4
9
7

Across

1

Unit of energy

4

Amplified beam of light

6

Center of an atom or cell

7

Force that attracts objects together

Down

2

Compound containing oxygen

3

Absolute temperature scale unit

5

Unit of power

8

Basic unit of life

9

Magnetic metallic element