8.1 quiz

Which of the following planets formed within the snow line? (Two correct answers) Select one or more: a. Earth b. Mars c. Jupiter d. Saturn e. Uranus

Earth, Mars

What evidence tells us that the Galilean moons evolved together with the planet?

The fact that all are tidally locked with Jupiter. Their orbital periods.

Which of the following describes a commonality between Earth and Jupiter? Select one: a. The heaviest elements (atomic weights greater than iron) sank to the center of the planet during its formation. b. Three distinct cloud layers are present in the atmosphere. c. Each acquired a large moon by the same process. d. The planet is still shrinking. e. The mass ratio of planet to moon(s) is the same.

The heaviest elements (atomic weights greater than iron) sank to the center of the planet during its formation.

If Saturn's axis were tilted 5° instead of 27° to the plane of its orbit, which of the following would be true about the appearance of the rings?

The maximum apparent extension of rings above and below the equator of Saturn would be smaller.

The spectrum of an exoplanet reveals significant amounts of methane with smaller amounts of ammonia. Considering this information alone, to which planet in our Solar System might we expect the exoplanet to be similar?

Uranus

Which of the Galilean moons is believed to have subsurface water? (Three correct answers) Select one or more: a. Callisto b. Ganymede c. Europa d. Io e. All are believed to have subsurface water.

a. Callisto b. Ganymede c. Europa

Moon 1 orbiting a gas giant is found to have a 5:4 orbital resonance with a second moon, moon 2. Which of the following statements describes their orbits? Select one: a. Moon 1 completes 5 orbits for every 4 completed by moon 2, and feels the stronger perturbation. b. Moon 2 completes 5 orbits for every 4 completed by moon 1, and feels the stronger perturbation. c. Moon 1 completes 5 orbits for every 4 completed by moon 2, and feels the weaker perturbation. d. Moon 2 completes 5 orbits for every 4 completed by moon 1, and feels the stronger perturbation. e. There is no way to tell from the given information.

a. Moon 1 completes 5 orbits for every 4 completed by moon 2, and feels the stronger perturbation.

Which of the following features differs significantly between Uranus and Neptune? (Two correct answers) Select one or more: a. inclination of their axes to vertical b. presence of cloud bands c. strong inclination of the magnetic field to the spin axis d. degree of seasonal impacts e. density

a. inclination of their axes to vertical Correct d. degree of seasonal impacts Correct

Which of the following is the most likely source of heat radiated by the ice and gas giants? Select one: a. solar radiation b. magnetic fields c. falling rain d. planet contraction e. nuclear fusion

planet contraction

A distant exoplanet is determined to have rings. From examples in our Solar System, what is the likelihood that it will also have moons?

quite high