Across
1
Tissue that contracts for movement
4
Our home planet
6
Gas essential for breathing
7
Amplified beam of light
Down
2
Mass per unit volume
3
Unit of heredity
5
Hottest planet in solar system
8
Second lightest element
Tissue that contracts for movement
Our home planet
Gas essential for breathing
Amplified beam of light
Mass per unit volume
Unit of heredity
Hottest planet in solar system
Second lightest element