"Rocks from Outer space."
The pieces of rocks that come from outer space have three names: meteor, meteorite, and meteoroid.
A meteoroid is a piece of matter moving in space.
I moves as fast as 40 miles a second. It may be large or small.
Most meteoroids are smaller than a grain of sand.
As a meteoroid comes into the air near the earth, it catches fire. Most meteoroids burn up before they hit the earth.
The flash of light from the burning meteoroid is called a meteor. If a piece of meteoroid fails to the ground, it is called a
meteorite.
People have studied these rocks for many years. They wanted to research ways to keep meteoroids from making
holes in spacecrafts. Thick walls may help. Or perhaps spacecrafts can be covered with a metal skin that will seal itself.
1. Where do the meteoroids originate?
a. from the outer layer of the earth
c. from the outer space
b. from the other planets
d. from the moon
2. A meteoroid catches fire when
a. it hits the earth.
c. it collides with a spacecraft.
b. it falls to the ground.
d. it comes into the air near the earth.
3. When is a meteoroid dangerous ?
a. when it falls to earth and burns down houses
c. when it hits the airplanes
b. when it makes holes in a spacecraft
d. when it catches fire
4. What is true of meteoroids, meteorites, and meteors?
a. They are all small.
c. They all fall to the earth.
b. They are all rocks.
d. They all turn into balls of fire.
5. Which is the best definition of a meteorite?
a. a flash of light from a burning meteoroid
b. a piece of meteoroid that falls to the ground
c. a piece of rock from outer space that hit a spacecraft
d. a piece of rock from outer space that burn up before hitting the ground​