What kind of energy is stored in a flashlight battery enabling it to function? electrical energy, chemical energy, mechanical energy, or gravitational energy ? : /

convex lenses are thicker at the middle. rays of light that pass through the lens are brought closer together (they converge). a convex lens is a converging lens. when parallel rays of light pass through a convex lens the refracted rays converge at one point called the principal focus.

causes

fossil fuels burn

cities become more industrialized

human population grows worldwide