Which of the following statements is true of the solar wind?
A) It makes the Sun gain mass.
B) It can be considered an extension of the corona.
C) It makes the gases from the solar atmosphere flow along the magnetic fields that point inward.
D) It refers to slow-moving atoms and ions that enter the solar corona.
B
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Magnetic Poles: A straight bar magnet is initially 4 cm long, with the north pole on the right and the south pole on the left. If you cut the magnet in half, the right half will
A. contain only a north pole. B. contain a north pole on the right and a south pole on the left. C. contain only a south pole. D. no longer contain any poles.
Plate tectonics states that
A) the continents move through Earth's crust like an icebreaker through ice. B) earthquakes occur because tectonic plates break like a dropped dinner plate. C) tectonic plates have not moved since Pangaea broke up. D) tectonic plates are in slow, but constant motion.
In an adiabatic free expansion
A. no heat is transferred between a system and its surroundings. B. the pressure remains constant. C. the temperature remains constant. D. the volume remains constant. E. the process is reversible.
Which of the following is true of meteors?
A) They are not stars. B) They orbit Terrestrial planets. C) They are composed of frozen water. D) They do not contain rock or metal.