What is the process called that fuels the life of a star and allows it to emit light? and describe what is occurring in the process.

What causes the cyclical changes in the appearance of the moon?

Which evidence is most likely used to indicate the beginning of solar system formation? a. materials combined to form a mass. b. materials were pulled together by gravity. c. water condensed and collected to form oceans. d. different species of microorganisms lived on earth.

Does anyone know the answers for these