Venus has a feature named Aphrodite Terra. What is this feature?
A) a very large volcano
B) a large impact crater
C) a continental-sized plateau
D) a large basin similar to the maria on the Moon
E) a great rift valley like Valles Marineris on Mars
C
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The Shroud of Turin, the Iceman, and the Dead Sea Scrolls were dated by use of
a. Rubidium-87. b. Potassium-40. c. Carbon-14. d. Uranium-238.
What do we mean by a runaway greenhouse effect?
A) a greenhouse effect that keeps getting stronger until all of a planet's greenhouse gases are in its atmosphere B) a greenhouse effect that starts on a planet but later disappears as gases are lost to space C) a greenhouse effect that heats a planet so much that its surface rock melts D) a process that heats a planet's surface, but that doesn't require the presence of greenhouse gases
Discovered by the spacecraft Galileo, Dactyl is a satellite of larger Ida
Indicate whether the statement is true or false
How does the Sun generate energy today?
A) nuclear fission B) nuclear fusion C) chemical reactions D) gravitational contraction E) gradually expanding in size