Unit #1 Test: Solar System

How many planets make up our solar system?

• 7 (seven)

• 8 (eight)

• 9 (nine)

• 10 (ten)

The outer planets (Jupiter, Saturn, Uranus, Neptune) of our solar system are made up mostly of ______.

• gases

• rocks

• metals

• soils

A single orbit (one trip) of a planet around the sun is called a ______?

This would take the earth 365 days or one year to complete.

• rotation

• revolution

A single spin (one turn) of a planet on its axis is called a ______?

This would take the earth 24 hours or one day to complete.

• rotation

• revolution

The inner planets (Mercury, Venus, Earth, Mars) of our solar system are made up mostly of ______.

• gases

• rocks

• metals

• soils

Which rocky planet is the smallest and closest to the sun?

It takes 88 Earth days to make one revolution around the sun.

• Mars

• Uranus

• Venus

• Mercury

Which rocky planet is the hottest and second closest to the sun?

It takes 255 Earth days to make one revolution around the sun.

• Venus

• Mars

• Pluto

• Neptune

Which rocky planet is made of 2/3 water and third closest to the sun?

It takes 365 1/4 Earth days to make one revolution around the sun.

• Venus

• Mars

• Earth

• Mercury

Which rocky planet has the largest dust storms and fourth closest to the sun?

It takes 687 Earth days to make one revolution around the sun.

• Venus

• Mars

• Earth

• Mercury

Which gaseous planet is the largest and fifth closest to the sun?

It takes 12 Earth years to make one revolution around the sun.

• Venus

• Saturn

• Jupiter

• Neptune