When you melt glass, the glass changes from a solid to a liquid. when the heat source is removed and the melted glass is allowed to cool, it changes back into a solid. the transfer of energy caused a change to the of glass.

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

George is a dalmatian puppy. describe what happens to light that allows you to see george’s black and white coat.

What is the mass of 0.46 mil of mgcl2