Astronomy (planets, asteroids, comets, meteors)

How many planets have astronomers identified in our solar system?

• 7

• 8

• 9

• 10

Which of the following is a dwarf planet?

• Pluto

• Mars

• Venus

• Mercury

Which is the correct order of the inner planets from the Sun?

• Earth, Venus, Mars, Mercury

• Venus, Mercury, Earth, Mars

• Mars, Earth, Venus, Mercury

• Mercury, Venus, Earth, Mars

Which of the following planets takes the longest to complete one orbit around the Sun?

• Earth

• Mars

• Neptune

• Venus

Tags

NGSS.MS-ESS1-2

Which characteristic do all of the planets in our solar system have in common?

• They have one or more moons.

• They have solid, rocky surfaces.

• They rotate on their axis and revolve around the Sun.

• They have rings made of dust, gravel, and rock.

What are the four planets closest to the Sun called?

• gas giants

• microplanets

• dwarf planets

• terrestrial planets

What is the correct order of the gas giants from the Sun?

• Uranus, Jupiter, Neptune, Saturn

• Jupiter, Saturn, Uranus, Neptune

• Saturn, Jupiter, Neptune, Uranus

• Neptune, Uranus, Saturn, Jupiter

Which of the following is not a characteristic of the gas giant planets?

• rings

• craters

• many moons

• largest planets

Which planet takes the least amount of time to orbit the Sun?

• Jupiter

• Mars

• Mercury

• Earth

What is the name for an irregularly shaped, rocky object that orbits the Sun?

• asteroid

• meteoroid

• dwarf planet

• minor planet