Across
1
Ball of burning gas in space
3
Mass per unit volume
4
Curved glass that refracts light
6
Infectious microscopic agent
7
Measure of matter in an object
Down
2
Particle of light
4
Amplified beam of light
5
Chemical element in table salt
Ball of burning gas in space
Mass per unit volume
Curved glass that refracts light
Infectious microscopic agent
Measure of matter in an object
Particle of light
Amplified beam of light
Chemical element in table salt