Astronomy

What two factors combine to keep the planets moving in orbit?

• Gravity and Mass
• Gravity and Weight
• Inertia and Gravity 
• Inertia and Mass

Where is the asteroid belt located?

• Between the Earth and Moon
• Between the orbits of Mars and Jupiter
• Between Earth and Mars
• Between the Sun and Mercury

Who was the first person to use a telescope to observe objects in space?

• Ptolemy
• Copernicus
• Galileo
• Kepler

What shape are the orbits of most comets?

• Circle
• Square
• Ellipse 
• Triangle

Which term describes a meteoroid that reaches the Earth's surface without burning up completely?

• Asteroid
• Meteoroid
• Meteorite
• Meteor

What type of galaxy is the Milky Way?

• Spiral
• Elliptical
• Regular
• Irregular

What term describes a small body of ice, rock, and comic dust loosely packed together?

• Meteorite
• Asteroid
• Comet
• Meteoroid

Which term describes a bright streak of light that results when a meteoroid burns up in the Earth's atmosphere?

• Asteroid
• Meteoroid
• Meteorite
• Meteor

Based on today's accepted ideas, the Earth Revolves around ________________.

• Jupiter
• The Moon
• The Sun
• Earth's Axis

Evidence suggests that the whole Universe is expanding and that it might have started billions of years ago from one place with the big bang.

• True
• False