Which of the following masses separates low mass stars from high mass stars?
A) about 50 solar masses
B) about 1 solar mass
C) about 2 solar masses
D) about 150 solar masses
E) about 0.08 solar masses
Question 2The Moon is constantly falling toward Earth.
Indicate whether the statement is true or false
Question 3Our solar system is located about 27,000 light-years from the galactic center. How far does our solar system travel in one orbit?
A) 85,000 light-years B) 54,000 light-years
C) 100,000 light-years D) 170,000 light-years
Question 4The Earth has a radius of about 6,000 km. How long would it take for an object traveling at the speed of light to circle the earth? (Recall that the speed of light is 300,000 km/s)
A) 1/300,000 of a second (0.0000033 s) B) 1/ 6000 of a second (0.00015 s)
C) 1/2 of a second (0.5 s) D) 1/50 of a second (0.02s)
Question 5Which of the following describes impact cratering?
A) the excavation of bowl-shaped depressions by asteroids or comets striking a planet's surface
B) the eruption of molten rock from a planet's interior to its surface
C) The disruption of a planet's surface by internal stresses
D) the wearing down or building up of geological features by wind, water, ice, and other phenomena of planetary weather
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