Across
1
Amplified beam of light
4
Chemical element in table salt
7
Path of a planet around the sun
8
Our home planet
Down
2
Nerve cell in the brain
3
Form of thermal energy
5
Icy body with a tail near the sun
6
Group of similar cells
Amplified beam of light
Chemical element in table salt
Path of a planet around the sun
Our home planet
Nerve cell in the brain
Form of thermal energy
Icy body with a tail near the sun
Group of similar cells