UNIT 6_Asteroid

Rocks in space are divided into two main groups. They are:

• comet and asteroid

• meteor and asteroid

• meteoroid and asteroid

• meteoroid and meteorite

What are comets?

• Comets are composed of dust and rock mixed with frozen water, methane and ammmonia

• Comets are considered to be like a large, dirty snowball

• Comets are piece of rocks which similar to the material formed into planets

• Comets are collections of stellar dust, planets and gas.

• Comets are all of the space and everything in the space

When passing close to the Sun, comets are broken downs and form:

• meteoroids

• asteroids

• planets

• stellar dusts

When the piece of broken comets combing with dust and rock from other sources in space, they form

• meteoroids

• meteor

• meteorite

• asteroids

When a meteoroid crash through Earth's atmosphere but do not hit the Earth's surface (we can see it but it is harmless), it is called

• meteor

• meteorite

• asteroid

• planet

When a meteoroid hit the Earth's surface, it is called

• meteorite

• meteor

• asteroid

• planet

Most asteroid are located in area between the orbits of Mars and Jupiter because

• The gravity of Jupiter might have kept a planet from forming in the area

• The gravity of Mars might have kept a planet from forming in the area

• The gravity of Sun might have kept a planet from forming in the area

• The gravity of Jupiter and Mars might have kept a planet from forming in the area

What can be concluded about the size of asteroids?

• From 2m to 975km

• Big as a planet

• Smaller than a planet

• Bigger than a meteoroid

• Smaller than a meteoroid

What are stellar dusts?

• Big round holes on the ground

• Small solid particles with masses of less than 0.1 grams, found in space.

• Collections of dusts, gas and planets

• Dust, rock mixed with frozen water, methane and ammonia

Dust, rock mixed with frozen water, methane and ammonia

• Asteroid
• Meteor
• Planet
• Comet