1. planets that are larger in diameter, farther from the sun, and less dense than smaller planets in the solar system are known as

terrestrial planets.
oort clouds.
gas giants.
nebula.

2. a comet is composed of

rock.
ice.
solar wind.
both rock and ice.

3. beyond the kuiper belt lies a great reservoir of comets called

the gas giants.
the oort cloud.
charon.
the great dark spot.