Author Question: Valles Marineris is a A) large valley on the Moon. B) vast plain on Mars. C) huge series of ... (Read 30 times)

hubes95 · **on:** Jul 27, 2018

Valles Marineris is a

A) large valley on the Moon.
B) vast plain on Mars.
C) huge series of cliffs on Mercury.
D) large canyon on Mars.
E) large canyon on Venus.

Question 2

The Dynamo Theory holds that

A) lightning plays a major role in generating our magnetic fields.
B) any other planet of similar density will also have a strong magnetic field.
C) the Earth's core, like Mercury's, is now a solid, rigid bar magnet.
D) magnetic fields are generated by rapidly spinning, fluid magnetic interiors.
E) the Earth's magnetic field must switch polarities every few million years.