Science Brain Teaser

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5
2
4
3
8
1
6
9
7

Across

1

Unit of force

4

Infectious microscopic agent

6

Biological catalyst

7

Natural satellite of Earth

9

Chemical element in table salt

Down

1

Nerve cell in the brain

2

Tissue that contracts for movement

3

Precious yellow metallic element

5

Compound containing oxygen

8

Absolute temperature scale unit