Who discovered Neptune in the late 19th century?
a. Galileo
b. Herschel
c. Galle
d. Le Verrier and Adams
e. Tombaugh and Lowell
Question 2What is the latest hypothesis for the creation of the ovoids on the surface of Miranda?
a. A secondary bombardment episode occurred near the Kuiper belt
b. Nitrogen ices warmed by the Sun melt and refreeze
c. Gravitation pulled together fragments of an earlier shattered moon
d. Tectonic plate movement at various subduction zones in its oceans
e. internal heat driving large and slow convection currents in the icy mantle
Question 3What is a unique geologic feature of Miranda?
a. faults
b. ovoids
c. lava flows
d. sinuous rilles
e. sulfur-based volcanoes
Question 4Which Uranian satellite appears to have been the most geologically active?
a. Titania
b. Ariel
c. Miranda
d. Umbriel
e. Oberon
Question 5What evidence is there that Titania underwent an active geological phase?
a. It has no large craters on its surface and a network of faults.
b. It currently has active volcanoes on its surface.
c. It is covered in methane ice.
d. It has a very smooth and highly reflective surface.
e. It has a large rocky core surrounded by an icy mantle.