Question

Meteoroids, meteors, and meteorites are all related. Choose the correct time-ordered pairing.

A.

Meteorites come before meteoroids.

B.

Meteorites come before meteors.

C.

Meteors come before meteoroids.

D.

Meteors come before meteorites.

E.

Meteoroids come after meteors.

What are the three types of meteorites?

A.

iron; stone; carbonite

B.

nickel; iron; stone

C.

carbonite; stony iron; iron

D.

stony; nickel; stony carbon

E.

stony; stony iron; iron

What is the least common type of meteorite?

A.

stony iron

B.

nickel

C.

iron

D.

carbonite

E.

stone

Which type of meteorite has the Widmanstatten pattern?

A.

stony iron

B.

nickel

C.

iron

D.

carbonite

E.

stone

Answer 1

(1) D

A meteor or "shooting star" is the passage of a meteoroid or micrometeoroid into the Earth's atmosphere, incandescent from air friction and shedding glowing material in its wake sufficiently to create a visible streak of light.

A meteoroid is a small rocky or metallic body travelling through space.

A meteorite is a solid piece of debris, from such sources as asteroids or comets, that originates in outer space and survives its impact with the Earth's surface. It is called a meteoroid before its impact.

So according to time order we initially have a meteoroid which is meteor then if survives; a meteoroit on entering the earth's atmosphere.

(2) E

Various types are as follows:

Iron meteorites were once part of the core of a long-vanished planet or large asteroid and are believed to have originated within the Asteroid Belt between Mars and Jupiter. They are among the densest materials on earth and will stick very strongly to a powerful magnet. Iron meteorites are far heavier than most earth rocks.

The largest group of meteorites is the stones, and they once formed part of the outer crust of a planet or asteroid. Many stone meteorites-particularly those that have been on the surface of our planet for an extended period of time-frequently look much like terrestrial rocks.

The least abundant of the three main types, the stony-irons, account for less than 2% of all known meteorites. They are comprised of roughly equal amounts of nickel-iron and stone.

(3) A

The least abundant of the three main types, the stony-irons, account for less than 2% of all known meteorites. They are comprised of roughly equal amounts of nickel-iron and stone.

(4) C

In most specimens of this group, the iron content is approximately 90 to 95% with the remainder comprised of nickel and trace elements. Iron meteorites are subdivided into classes both by chemical composition and structure. Structural classes are determined by studying their two component iron-nickel alloys: kamacite and taenite.

These alloys grow into a complex interlocking crystalline pattern known as the Widmanst