lesson 28 5

Today, we are certain that Uranus has no moons and 15 rings.

• false

• true

Most of Uranus’s atmosphere is composed of helium and hydrogen, which causes its atmosphere to reflect blue light back into space.

• false

• true

Uranus has a large, solid core that extends almost to the planet’s surface.

• false

• true

The rotational axis of Uranus is tipped over so far that the north pole almost lies in its orbital plane.

• true

• false

Saturn is the only planet with rings.

• false

• true

Uranus’s tilt and its great distance from the Sun result in seasons on Uranus that last about 21 Earth years.

• false

• true

Until 1994, Neptune had a persistent storm, the Great Dark Spot, with characteristics similar to Jupiter’s Great Red Spot.

• true

• false

Neptune’s largest moon, Triton, has a retrograde orbit, which means it orbits like every other satellite in the solar system.

• false

• true

Triton has nitrogen geysers and a thin atmosphere.

• true

• false

Neptune’s six rings are composed of microscopic dust particles.

• true

• false