True False 38. A kilometer contains 1 million meters. True False 39. Hipparchus devised the magnitude scale in the late 1700s. True False 40.
Solar flares have no known effect on the earth.
True False 41. The Copernican model of the universe discarded heliocentrism and uniform circular motion. True False 42. Light can behave as a particle or as a wave. True False 43.