Meteorites is a lecture. It is included as a quiz section minilecture in the astronomy course on the principles of radiation astronomy.

NWA 7325 is a unique meteorite. Credit: Stefan Ralew /

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1 Yes or No, An oxygen isotope discrepancy was noted forty years ago in a stony meteorite that exploded over Pueblito de Allende, Mexico.


2 Complete the text:

Match up the type of silicate with the name:
cyclosilicate - A
inosilicate - B
orthosilicate - C
sorosilicate - D
phyllosilicate - E
tectosilicate - F
structurally isolated double tetrahedra

single chain of tetrahedra

a continuous framework of tetrahedra

a ring of linked tetrahedra

a two-dimensional sheet of tetrahedra

isolated tetrahedra


3 True or False, There are green or green mineral containing meteorites.


4 Moldavite is a mineral that may be associated with what green astronomy phenomenon?

predicting the end of the Earth
determine the accuracy of local computers
meteorite impacts
demonstrating that Venus was once a comet
predict when currently dormant volcanoes will erupt
green fireballs

5 True or False, There are blue or blue mineral containing meteorites.


6 Complete the text:

The majority of known asteroids orbit the Sun between the orbits of



7 True or False, There are red or red mineral containing meteorites.


8 Phenomena associated with some meteorites?

have a gaseous surface
long nickel-iron crystals

9 True or False, There are violet or violet mineral containing meteorites.


10 A thin-section of a meteorite that may be analyzed has which of the following?

a great many light gray and dark gray chondrules present
large grain cross sections making sizing easy
an available sizing or magnification marker
independent verification as a meteorite
correctable diameters and relative abundances
optical conditions

11 True or False, There are cyan or cyan mineral containing meteors or meteorites.


12 A natural rocky source of chemicals from the sky to the ground may originate from what astronomical source?

the solar wind
the diffuse X-ray background
Mount Redoubt in Alaska
the asteroid belt
the International Space Station

13 True or False, There are yellow or yellow mineral containing meteorites.


14 Complete the text:

Match up the form or type of quartz with the effect:
alpha quartz - A
coesite - B
cristobalite - C
stishovite - D
seifertite - E
tridymite - F
10 GPa and above 1200°C

2-3 gigapascals and 700°C

22-460°C tabular crystals

trigonal tectosilicate

35 GPa to 40 GPa orthorhombic

1470°C cubic or tetragonal form


15 True or False, There are orange or orange mineral containing meteorites.


16 Meteorites found on Earth may be from which of the following?

the Moon
the asteroid belt

17 True or False, The visible path of a meteoroid that has entered the Earth's atmosphere is called a meteorite.


18 Considering that many rock types bear a striking resemblance to meteorites which are the one or few ways to differentiate a meteorite from a terrestrial rock?

the Ca/Si ratio
the Al/Si ratio
enstatite rather than diopside
oxygen isotope ratios
observed orbit and fall with verified recovery

19 True or False, A metallic or stony object that is the remains of a meteor is called a meteoroid.


20 True or False, Seifertite has only been found in Martian and lunar meteorites.



  1. Meteorites should also be coming into from other large rocky objects such as Mercury, asteroids, and the satellites of the gas giants.

See alsoEdit

External linksEdit

{{Principles of radiation astronomy}}