Across
1
Group of similar cells
5
Basic unit of life
6
Biological catalyst
9
The Red Planet
Down
2
Our home planet
3
Curved glass that refracts light
4
Second lightest element
7
Nerve cell in the brain
8
Force that attracts objects together
Group of similar cells
Basic unit of life
Biological catalyst
The Red Planet
Our home planet
Curved glass that refracts light
Second lightest element
Nerve cell in the brain
Force that attracts objects together