Oort Cloud and Comets

What are comets made of?

• Metals like iron and nickel
• Gas
• Hydrogen Gas
• Ice and rock

The orbit of comets is which shape?

• Circular
• Elliptical/Oval
• Comets do not orbit the Sun

Where do most comets come from?

• In the Kuiper Belt & Oort Cloud beyond Neptune's orbit

• In the Asteroid Belt between Mars and Jupiter

• Near the Sun

• Earth's atmosphere

The Oort Cloud is the origin of ___

• short period asteroids
• long period asteroids
• short period comets
• long period comets

The tail of a comet usually faces

• toward the sun
• toward the Earth
• away from the Sun
• away from the Earth

The Oort Cloud starts about 70 times farther out than Neptune and extends as much as ___

• half a light year
• a light year
• ten light years
• 70 light years

What are the parts of a comet?

• nucleus, coma, plain tail, newton tail.

• nucleus, coma, ion tail, dust tail

• the nucleus, protons, electrons, neutrons

• head, coma, arm, leg

Why does the comet's tail always point the way it does?

• because of opposite magnetic forces

• because of solar wind

• because you can't see it pointing toward the sun

• because of gravity

What is the Oort cloud?

• the birthplace of stars

• an icy spherical region that surrounds the solar system

• a nearby solar system

• an icy asteroid belt just outside the orbit of neptune

How many visible parts does a comet have?

(a)