Ch 25 Test

Front

What is the only inner planet that has been explored by rovers?

Back

Mars is the only inner planet that has been explored by rovers.

Front

How many asteroids have been discovered in total?

Back

Over 1 million asteroids have been discovered.

Front

What shape are the orbits of the planets in our solar system?

Back

The orbits of the planets are elliptical.

Front

Do all inner planets have iron cores?

Back

Yes, all inner planets (Mercury, Venus, Earth, and Mars) have iron cores.

Front

What are some features of the solar system?

Back

Features include: all planets lie in the same plane, most orbit the Sun in the same direction, and all rotate in the same direction.

Front

What is the main component of the solar system?

Back

The Sun is the main component of the solar system.

Front

What are the inner planets?

Back

The inner planets are Mercury, Venus, Earth, and Mars.

Front

What distinguishes inner planets from outer planets?

Back

Inner planets are rocky and smaller, while outer planets are gas giants.

Front

What is the asteroid belt?

Back

The asteroid belt is a region between Mars and Jupiter where most asteroids are found.

Front

What is the Kuiper Belt?

Back

The Kuiper Belt is a region beyond Neptune filled with icy bodies and dwarf planets.