HELP Which statement describes an effect of large asteroid and comet impacts? They may cause continents to move. They may cause small craters on Earth’s surface. They may cause changes limited to within the crater. They may kick up dust and pollute Earth’s atmosphere.

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

What is the equation for calculating rf values

Is the genie in the bottle experiment a physical or chemical change/reaction?