At divergent boundaries, basaltic magma is generated by
A. Partial melting of mantle rock
B. Partial melting of continental crust
C. Partial melting of ocean crust
Ans: A. Partial melting of mantle rock
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Which of the following is the largest distance?
A) diameter of a typical galaxy B) diameter of Pluto's orbit C) distance to the nearest star (other than our Sun) D) 1 light-year
Which of the following is TRUE?
A) Visible light makes up the greatest part of the electromagnetic spectrum. B) In a vacuum, electromagnetic waves all travel at the same speed, the speed of light. C) Ultraviolet light has the shortest wavelength of any electromagnetic wave. D) A blackbody emits all its radiation at a single wavelength or frequency. E) Electromagnetic waves cannot travel through empty space.
Quasars are most common in the redshift range of _____
A) 0.6 to 1.5 B) 2 to 2.7 C) 3.2 to 4 D) 5 to 5.8
Velocity Addition: A person in a rocket ship traveling past the earth at a speed of 0.500c fires a laser gun in the forward direction. With what speed does an observer on Earth measure for the light pulse?
Fill in the blank(s) with the appropriate word(s).