Question

1. choose the best answer.

a space object with a(n) ______ orbit does not orbit anything else and does not have other objects in its orbit.
options: clear, shared, shifting, irregular

1. choose the best answer.

ceres is ______
options: the only dwarf planet with a moon, the only dwarf planet to be reclassified, the first dwarf planet to be visited by a spacecraft, the first moon discovered at a dwarf planet

Explanation:

Question 3

To determine the type of orbit for a space object that doesn't orbit another and has no other objects in its orbit, we refer to astronomical definitions. A "clear" orbit means the object has gravitationally cleared its orbital path, fitting the description (doesn't orbit another, no other objects in its orbit). "Shared" implies sharing orbit, "shifting" is not a standard orbital term here, and "irregular" refers to non - standard orbital shapes, not this concept.

Ceres is a dwarf planet. It was the first dwarf planet to be visited by a spacecraft (Dawn spacecraft). It is not the only dwarf planet with a moon (e.g., Pluto has moons), it was not reclassified from a planet in the sense of being the "only" reclassified, and it is a dwarf planet, not a moon of a dwarf planet.

Answer:

A. clear

Question 4