Solar System Study Guide

Which of these is a dwarf planet?

• Jupiter
• Uranus
• Pluto
• Venus

Which is the largest object in the solar system?

• Sun
• Moon
• Star
• None of the above

How many major planets are there in our solar system?

• 7
• 25
• 10
• 8

The time that is taken by Neptune to travel once around the Sun is called

• a Neptune day
• a Neptune year
• a Neptune week
• a Neptune period

Distance in the solar system is measured by

• miles
• kilometers
• astronomical units
• light years

A(n) _______ is the distance from the Sun to Earth.

• astronomical unit
• solar unit
• solar meter
• none of the above

Together, all of the planets equal the mass of the Sun.

• true
• false

One day on Venus is equal to approximately 243 Earth days.  What does this mean?

• the length of a planet's day is inversely related to its distance from the Sun
• the length of a planet's day is directly related to its distance from the Sun
• Venus takes 243 Earth days to rotate once on its axis
• Venus takes 243 Earth days to orbit the Sun once

Which of the following is most similar to Earth in terms of size and overall mass?

• Venus
• Mercury
• Mars
• Jupiter

The Sun is _____ more massive than the rest of the solar system combined.

• 10 times
• 20 times
• 200 times
• 500 times