What is true of both earthquakes and volcanoes?

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

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17

The identities of substances are the same before and after which type of change