Someone help ,, I'll give brainliest lolll .

Which is the layer underground where all empty spaces are filled with a combination of air and water ?

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this