Ultraviolet light from the sun can a. damage nerve cells but not skin cells. b. damage molecules in skin cells, such as dna. c. cause skin cells to release stinging chemicals. d. skin cells to repair dna faster.

B.  It can damage molecules in skin cells such as DNA. Prolonged exposure can actually cause skin cancer.

pure water does not conduct electricity very well. however, when certain substances are dissolved in water, the solution does conduct electricity. you can make a simple device that shows how well a solution conducts electricity. this device uses a flashlight bulb to indicate how well the solution conducts electricity. the better the solution conducts electricity, the brighter the bulb will glow.

explanation: