Exam 24: Touring Our Solar System

Only a few thousand impact craters have been identified on Venus's surface, even though it, too, would have experienced the same heavy bombardment period that affected Mercury and the moon.Why does Venus appear relatively unscathed?

The smallest of the planets in our solar system is Pluto.

What substance makes up the core of large Jovian planets like Saturn?

What process is responsible for the extreme volcanic activity on Io?

Uranus is famous for its large red circle called the Great Red Spot.

How do astronomers know that asteroids are left over debris from the solar nebula?

Earth's axial tilt is currently 23.5° from vertical.Uranus's axis of rotation is completely horizontal.How did this occur?

Compare and contrast terrestrial and Jovian planets.

________ is the largest known asteroid.

Because of its immense gravity, the diameter of the planet Jupiter shrinks by a few centimeters each year.

The most volcanically active body in the solar system is ________.

Neptune has only one satellite, and it is a moon named Triton.

What kinds of rocks were most commonly retrieved from the lunar highlands?

What impact crater feature is highlighted with the arrows in this image?

Because of the low relative mass, the gravitational attraction on the moon is ________ that of the Earth.

An estimated 99.85 percent of the mass in the solar system is concentrated in ________.

The atmospheric pressures on Venus are approximately 90 times greater than those on Earth, which had the ability to crush spacecraft sent there in the 1970s.

What was the name of the manned space missions that have successfully landed on the surface of the moon?

Water erosional features are commonly found on the moon, particularly in the highland areas.

What visual evidence do scientists have to support the fact that Jupiter is the fastest-rotating planet in the solar system?