What chemical is in your epidermis

Drag each label to the correct location on the chart. classify each reaction as endothermic or exothermic.

What are the similarities of physical and chemical change ?

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