The Origin of the Solar System

The _________ _________ states that the solar system formed from a rotating cloud of dust and gas.

atomic theorynebular theorykinetic theoryNewton theory

The generally accepted explanation for the formation of the

______________ is the nebular theory.

A large, thin cloud of dust and gas like the one that eventually formed our solar system is called a(n) __________________.

According to the nebular theory, the solar nebula formed from the material expelled by ________________________.

The ____________ of the solar nebula, a large cloud of dust and gas, led to a disk-shaped protoplanetary disk, from which the sun and planets formed.

dispersiondisappearancecontractionsublimation

____________________ were asteroid-like bodies that eventually combined to form planets.

Planetesimals grew by _______________, the process of adding mass by colliding with other planetesimals.

The ___________________ provides an explanation for the current motions of the sun, planets, and most moons–nearly all revolve in the direction that the protoplanetary disk was spinning.

The terrestrial planets are relatively small and rocky. In part, that is because the inner solar system was ____________ during their formation for ice-forming compounds to condense.

As the outer planets grew, their gravity increased, and they were able to capture ____________ and ____________ gas.