On a topographic map, what do the contour lines indicate? Roads
Rivers
Elevation
Mountains

This flow chart shows the amount of energy that is emitted by each type of light. ultraviolet > blue light > yellow light > red light (maximum energy) (minimum energy) in an experiment, shining which type of light on a strip of metal would be least likely to produce the photoelectric effect? ultraviolet light dim blue light bright red light bright yellow light

This drawing shows a human body system. what is the primary function of this body system?

What are the similarities of physical and chemical change ?