Answer is D
Explanation: A gamma ray primarily consists of pure energy and no mass.
I think it is <span>Symbiosis. But I dont know how to explain it</span>
The two elements that produce background radiation on earth are Radon and Uranium. Airborne radon can decay on its own. Radon undergoes alpha decay to produce Polonium. Uranium naturally undergoes alpha decay to produce Thorium.
Answer:
solids have definite shape and volume. liquid have definite volume but not definite shape. gases do not have definite volume as well as definite shape.
