Science Word Puzzle

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7
4
8
2
6
5
1
3

Across

1

Natural satellite of Earth

3

Tectonic landmass section

6

Substance with pH below 7

8

Curved glass that refracts light

Down

2

Icy body with a tail near the sun

4

Gas form of a liquid

5

Unit of electric potential

7

Precious yellow metallic element