Space #1

The most recent definition of a planet was adopted by the International Astronomical Union in 2006. It says a planet must do three things, one of those things are...

• It must have cleared away any other objects of a similar size near its orbit around the Sun.

• It must have organic life forms.

• It must have an an orbit inside the asteroid belt.

• It must have at least one moon.

Pluto was declassified has a planet because...

• it's too small.

• it's not a sphere.

• it hasn't cleared it's orbit of debris.

• it's orbit around the Sun is so strange.

Which object in Earth's solar system can also be called a gas giant?

• inner planets
• star
• comet
• outer planet

The largest space objects that orbit the sun are called _____________.

• moons
• dwarf planets
• planets
• asteroids

A large rocky object that orbits a planet is called a ____________.

• moon
• planet
• dwarf planet
• comet

The Asteroid belt is located between which two planets?

• Mars and Jupiter

• Venus and Earth

• Jupiter and Saturn

• Earth and Jupiter

Which is true of the dwarf planets?

• more massive than nearby objects

• never have moons

• orbit near the Sun

• spherically shaped

Pluto was changed to a dwarf planet because...

• it was too small and doesn't clear the area around it.

• no one like it, so they voted for it to be removed.

• it was too far from the sun and too cold to be a real planet.

• planets can't be made of rocky material.

What planet is closest to the sun?

• Mercury
• Mars
• Venus
• Sun

Have humans walked on any other planet?

• Yes
• No