Science Ch. 9

What keeps Earth and all other planets in their orbit around the sun?

• Earth’s gravitational pull
• Sun’s gravitational pull
• Moon’s gravitational pull
• Jupiter’s gravitational pull

What is unusual about Pluto’s orbit?

• it's titled
• it's round
• it's oval
• it doesn't have an orbit

How long does it take Earth to complete one full rotation?

• 1 day
• 1 week
• 1 month
• 1 year

What is the northern end of Earth’s axis called?

• North Pole
• South Pole
• North Star
• South Star

If it is Spring in the Northern Hemisphere, what season is it in the Southern Hemisphere?

• Spring
• Summer
• Winter
• Fall

Where is the asteroid belt found?

• between the Sun and Mercury
• between the Earth and Mars
• between Mars and Jupiter
• between Venus and Earth

What shape is the Earth’s orbit?

• Round
• Oval
• Square
• Octagon

Why do most asteroids not hit Earth?

• Earth’s gravitational pull
• Sun's
  Sun’s gravitational pull
• Moon’s gravitational pull
• Jupiter’s gravitational pull

What object is at the center of the solar system?

• Earth
• Sun
• Moon
• Mars

What do we call gigantic balls of very hot gases that give off radiation?

• star
• comet
• meteor
• asteroid