Deck 25: Meteorites Asteroids and Comets

Question 1

What do CAIs include?

A) carbon and aluminum
B) carbon and ammonium
C) calcium and argon
D) chlorine and argon
E) calcium and aluminum

Answer 1

calcium and aluminum

Question 2

Once an object strikes Earth's surface, it is called a "meteor".

Answer 2

False

Question 3

What do we learn by studying chondrites?

A) Earth's early composition
B) the history of comets from the Oort cloud
C) the different formations of the Terrestrial and Jovian planets
D) the steps in planetary differentiation
E) the conditions and processes from the early days of the solar nebula

Answer 3

the conditions and processes from the early days of the solar nebula

Question 4

What kind of asteroid crosses into Earth's orbit?

A) Apollo object
B) Amor object
C) Centaur asteroids
D) Kirkwood objects
E) Trojan asteroids

Question 5

Comet dust particles that later encounter Earth are seen as meteors.

Question 6

What is so special about the carbonaceous chondrites?

A) rich in hydrogen and helium
B) rich in organic compounds
C) rich in nitrogen
D) rich in oxygen
E) rich in rare metals, such as gold

Question 7

Only about three comets per year plunge into the Sun and are destroyed.

Question 8

On any clear night, you can see 3 to 15 meteors per hour.

Question 9

What do the size and shape of Widmanstätten patters indicate?

A) the age of the meteorite
B) that the molten metal of the meteorite cooled very slowly
C) the metallic content of the core of the meteorite
D) the origination of the meteorite
E) the number of organic compounds found within the meteorite

Question 10

Which statement is true about asteroids?

A) All asteroids are found in the asteroid belt between Mars and Jupiter.
B) Asteroids are also called dwarf planets.
C) Asteroids have an irregular shape and are battered by impact cratering.
D) All asteroids have bright, reflective surfaces.
E) Asteroids originated from older moons.

Question 11

Why is it easier to locate meteorites in Antarctica than anywhere else on Earth?

A) Antarctica is an easy location for humans to access.
B) More scientists are in the area to find meteorites.
C) When meteorites land, they melt a small crater on the ice.
D) Meteorites are easy to detect on top of the ice where there are no Earth rocks.
E) Meteorites fall most often through the ozone hole above the South Pole.

Question 12

Comets are solid objects.

Question 13

Most asteroids are very regular in shape with bright surfaces.

Question 14

Iron meteorites are easy to recognize because a magnet can stick to them.

Question 15

Asteroid 2004 MN4 is predicted to strike Earth in 2029.

Question 16

Earth is hit about once a week by meter-size asteroids.

Question 17

When you document the time and place of a meteorite as it streams through the atmosphere, it is considered a(n) ____.

A) fall
B) find
C) meteoroid
D) chondrite
E) impactor

Question 18

Some astronomers speculate there are as many Trojan asteroids around Jupiter as asteroids in the asteroid belt.

Question 19

Most meteors come from pieces of comets.

Question 20

Stony meteorites are common among falls.

Question 21

What is the largest object found between Mars and Jupiter?

A) Comet Halley
B) Asteroid Ceres
C) Comet Hale-Bopp
D) Comet Tempel
E) Asteroid Vesta

Question 22

A Trojan asteroid is caught within the Lagrange points of which planet?

A) Venus
B) Earth
C) Mars
D) Jupiter
E) Neptune

Question 23

Where on Earth is the impact crater that scientists believe caused the extinction of dinosaurs?

A) Flagstaff, Arizona
B) Chicxulub, Mexico
C) Aricebo, Puerto Rico
D) Mauna Kea, Hawaii
E) Antarctica

Question 24

What do scientists believe to have caused the Tunguska event?

A) a comet
B) an iron asteroid
C) a stony-iron meteorite
D) a stony asteroid
E) a carbonaceous chondrite

Question 25

The ____ of a comet is a lump of fragile, porous material containing ices of water, carbon dioxide, and ammonia.

A) nucleus
B) coma
C) dust tail
D) gas tail
E) chondrule

Question 26

Which type of asteroid is classified as rocky, bright, and reddish?

A) C-type
B) F-type
C) M-type
D) S-type
E) V-type

Question 27

Which comet hit Jupiter in 1994?

A) Comet Tempel 1
B) Comet Kohoutek
C) Comet Hale-Bopp
D) Comet Halley
E) Comet Shoemaker-Levy 9

Question 28

Where are S-type asteroids typically found in the Solar System?

A) in the Kuiper belt
B) the inner asteroid belt
C) the outer asteroid belt
D) at the Lagrange points of Jupiter
E) near Earth

Question 29

What are Sun grazers?

A) asteroids that impact the Sun
B) meteors that impact the Sun
C) any celestial body that orbits the Sun
D) asteroids that come in close proximity to the Sun
E) comets that come in close proximity to the Sun

Question 30

Which type of asteroid is classified only slightly red, mostly consisting of an iron-nickel alloy?

A) C-type
B) F-type
C) M-type
D) S-type
E) V-type

Question 31

About how far is the Oort cloud from the Sun?

A) 3 to 5 AU
B) 45 to 60 AU
C) 100 to 1000 AU
D) 10,000 to 100,000 AU
E) 4.6 billion AU

Question 32

What are the most common type of meteorite?

A) chondrites
B) chondrules
C) iron meteorites
D) carbonaceous chondrites
E) calcium-rich carbonites

Question 33

What eventually happens to a comet when its orbit brings it into the inner Solar System?

A) It builds up speed and increases its orbital period.
B) It is vaporized by the Sun, becoming inactive rock and dust.
C) It is pulled in by the gravitation forces of a Terrestrial planet.
D) It is blasted apart by asteroids within the asteroid belt.
E) It absorbs more ice and rock from asteroids within the asteroid belt.

Question 34

A ____ is produced by ionized gas carried away from the comet by solar wind.

A) nucleus
B) coma
C) dust tail
D) gas tail
E) chondrule

Question 35

What kind of asteroid crosses into Mars' orbit?

A) Apollo object
B) Amor object
C) Centaur asteroids
D) Kirkwood objects
E) Trojan asteroids

Question 36

What causes the meteor showers we witness on Earth?

A) Earth passes through comet dust particles.
B) Earth passes through remnants of an impacted asteroid.
C) Earth passes through the asteroid belt.
D) Earth passes through the coma of a comet.
E) Earth passes through solar wind particles.

Question 37

What type of celestial bodies are found within the Oort cloud?

A) terrestrial-like planets
B) planetesimals
C) icy gas giants
D) dust and rock
E) icy bodies

Question 38

Why don't short-period comets have randomly oriented orbits?

A) Their orbits have been altered by encounters with planets.
B) Their orbits are altered by the Sun's gravitational pull.
C) Their orbits have been altered by impacts from asteroids.
D) Their orbits have been altered by the Lagrange points of Jupiter.
E) Their orbits have been altered by solar wind particles from a CME.

Question 39

Which type of asteroid is classified to be dark as coal and probably carbonaceous?

A) C-type
B) F-type
C) M-type
D) S-type
E) V-type

Question 40

Armor asteroids cross into the orbit of which planet?

A) Mercury
B) Venus
C) Earth
D) Mars
E) Jupiter

Question 41

What space mission has collected data on Vesta, with its next destination to be Ceres?

A) New Horizons
B) HST
C) SOHO
D) Dawn
E) Deep Impact

Question 42

Most types of chondrites contain _______________, small bits of glassy rock only a few millimeters across.

Question 44

A meteorite that is discovered on or in the ground, but not seen to fall, is called a(n) _______________.

Question 45

Do all comets have tails? Explain how comets form their tails.

Question 46

Stony meteorites called _______________ tend to be rock with a composition similar to Earth's basalts with no volatiles.

Question 47

Nonbelt asteroids can become trapped in the _______________ along Jupiter's orbit.

Question 48

Differentiate the S-, C- and M-type asteroids.

Question 49

Nearly all meteors are material from _______________.

Question 50

Which characteristics of asteroids are used to classify them?

Question 51

Gas and dust released by a comet's icy nucleus produce a(n) _______________ and are then blown outward, away from the Sun.

Question 52

In what type of meteorites are Widmanstätten patterns found?

A) stony
B) iron
C) stony-iron
D) carbonaceous
E) centaur

Question 53

Explain the phenomenon of Kirkwood gaps. Where can they occur?

Question 54

Eugene Shoemaker proved that the Barringer Crater is the result of an impact because he found _______________ in and around the crater that had been subjected to pressures higher than those produced by a volcano.

Question 55

Orbits almost free of asteroids within the asteroid belt are called _______________.

Question 56

Sequence the events in the origination of different types of meteorites.

Question 57

Why is it easier to find an iron meteorite on the ground that it is to witness one fall?

Question 58

_______________ objects are asteroids with orbits that carry them into the inner Solar System.

Question 59

The best place to search for meteorites on Earth is in parts of _______________.

Question 60

What do astronomers believe asteroids are remnants of and why?

Question 61

Are comets common?  Explain why or why not.

Question 62

_______________ are comets that come very close to the Sun.

Question 63

What do you think would happen to life on Earth if Earth was hit by a large (1 km or bigger) asteroid or comet?

Question 64

Why is it important to look closely at the bands of the interior of a meteorite?

Question 65

Long-period comets originate in the _______________.