The terrestrial planet with the most effective greenhouse effect is ____________________.
Fill in the blank(s) with correct word
Question 2That the radio lobes radiate synchrotron radiation indicates that
a. high speed electrons are spiraling through a magnetic field.
b. the source of the radio jets must be a black hole.
c. the source of the radio energy is rotating rapidly.
d. the central galaxy must be a giant elliptical galaxy.
e. the central galaxy must rotate about two nearly perpendicular axes.
Question 3The terrestrial planet with the most moons is ____________________.
Fill in the blank(s) with correct word
Question 4The central galaxy in a double-lobed radio source is usually
a. an irregular galaxy.
b. a spiral galaxy.
c. a dwarf elliptical galaxy.
d. a giant elliptical galaxy.
e. a quasar.
Question 5The terrestrial planet with the oldest surface is ____________________.
Fill in the blank(s) with correct word
Question 6The fact that many radio lobes emit more intensely from the side away from the galaxy suggests that ...
a. they are formed by material falling into the galaxy.
b. they are powered by magnetic fields.
c. they are excited by radiation from nearby galaxies.
d. they are powered by the rapid rotation of the galaxy.
e. they are created by jets from the galaxy emitting where the material is halted.
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