PHSC 121 HW 8 Review Practice Test 2024.

PHSC 121 HW 8 Review Practice Test 2024. A black hole is - CORRECT ANSWER b. a region in space where mass produces a gravity field so intense that neither matter nor light itself can escape Black hols are thought to be caused by - CORRECT ANSWER a. collapsing stars b. concentrated mass at the center of galaxies Black holes are theorized to be - CORRECT ANSWER b. at the center of galaxies c. at the center of quasars A quasar is - CORRECT ANSWER c. a large remote energy source which may contain a black hole Quasars are thought to be caused by - CORRECT ANSWER a. high energy radiation emission from the cores of galaxies Quasars are theorized to be located - CORRECT ANSWER d. at the centers of galaxies One theory of Solar System formation is that the Sun had a close encounter with another star or large object. Why does this not work? - CORRECT ANSWER c. The collision does not explain the various exceptions to natural orbit and rotational motion evident in the Solar System How does the Nebular hypothesis say the Solar System formed? - CORRECT ANSWER b. A large rotating gas cloud existed and compressed into the sun with the planets forming by collisions and accretion of rotating masses According to the nebular hypothesis the Sun itself formed - CORRECT ANSWER d. from gravitational collapse of a rotating gas cloud and resultant heating so that spontaneous nuclear fusion reactions occurred