ast-com-met

Question 0

largest asteroid and is about 1000 km in diameter

Answer 0

CERES

Question 1

small rock bodies that have been likened to be flying mountains

Answer 1

ASTEROIDS

Question 2

T or F

The smallest asteroids are assumed to be no larger than grains of sand

Answer 2

T

Question 3

T or F

Most asteroids lie between the orbits earth and mars. They have orbital periods of 3 to 6 years

Answer 3

F - between Mars and Jupiter

Question 4

Asteroids are also called _________, millions of rocks and metal fragments of various shapes and sizes that orbit the sun

Answer 4

Microplanets

Question 5

First discovered in 1801

Answer 5

Ceres

Question 6

completes a solar orbit every 14 years

Answer 6

Hidalgo

Question 7

Trace an orbit similar to Jupiter’s one group in front of the planet another behind it

Answer 7

Trojans

Question 8

Percentage of the total mass of the asteroids compared with the mass of the moon

Answer 8

15%

Question 9

The open areas in the main asteroid belt are devoid of asteroids

Answer 9

Kirkwood gaps

Question 10

A ____________ is smaller than the moon is broken up by a ________ collision and additional collisions yield asteroids that bombard Earth

Answer 10

Planetoid, Giant

Question 11

T or F

Many asteroids have irregular shapes.

Answer 11

T

Question 12

Asteroid 951, also called as _________ is probably the fragment of a larger body that was torn apart by a collision

Answer 12

Gaspra

Question 13

Moon of Asteroid Ida

Answer 13

moon Dactyl

Question 14

three types of asteroids

Answer 14

Siliceous
Carbonaceous
Metallic

Question 15

an asteroid 35 miles (56 km) long its surface is marked by collisions with other bodies

Answer 15

Asteroid Ida with moon Dactyl

Question 16

Most interesting amd unpredictable bodies in the solar system

Answer 16

Comets

Question 17

pieces of rocky and metallic materials held together by frozen gases, such as water, ammonia, methane, carbon dioxide, and carbon monoxide

Answer 17

Comets

Question 18

comets that leave their original orbits amd approach the Sun generally settle into new trajectories

Answer 18

Periodic Comets

Question 19

formed by the nucleus amd the coma

Answer 19

head

Question 20

front part of the head of a comet

Answer 20

impact front

Question 21

envelops the nucleus, formed by the gases and dust that it releases

Answer 21

Coma

Question 22

frozen water, methane, carbon dioxide, ammonia, rock and dust

Answer 22

Nucleus

Question 23

the trail of suspended gases generates a low intensity, luminous region w/ a bluish color. the gas molecules lose an electron and therefore have an electric charge

Answer 23

Ion tail

Question 24

suspended dust particles trail behimd the comet, reflecting sunlight and making the luminous tail visible

Answer 24

Dust tail

Question 25

can measure 62, 000 miles (100, 000 km) or more im diameter

Answer 25

Head

Question 26

T or F because of the effects of solar radiation and the solar wind, gases and dust are released from an accelerating comet. the dust particles tend to form a curving tail, which is less sensitive to the pressure of the solar wind. As the comet leaves, the confines of the solar system, its tail coincide once more but they disappear as the nucleus cools down and ceases releasing gases

Answer 26

T

Question 27

orbits around the sun that are shorter than 200 years

Answer 27

comets with short periods

Question 28

T or F | Those with a period of more than 200 years travel tens or hundreds of times farther from the sun than pluto

Answer 28

T

Question 29

T or F | As the comet moves closer to the sun, its tail disappears

Answer 29

F - away from the sun

Question 30

T or F close to the sun,the tail reach maximum length

Answer 30

T

Question 31

glowing head

Answer 31

coma

Question 32

T or F | the tail of a comet points away from the sun

Answer 32

T

Question 33

two solar forces are known to contribute to the fact that comets's tail points away from the sun

Answer 33

Radiation pressure | Solar wind

Question 34

pushes dust particles away from the coma

Answer 34

Radiation pressure

Question 35

responsible for moving ionized gases, particularly carbon monoxide

Answer 35

Solar wind

Question 36

T or F as a comet moves away from the sun, the gases forming the coma recondense, the tail disappears, amd the comet returns to cold storage

Answer 36

T

Question 37

T or F | Most comets cannot survive more than a few hundred close orbits of the sun

Answer 37

T

Question 38

short orbital periods are thought to orbit beyond Neptune in a region called ________

Answer 38

Kuiper belt

Question 39

T or F Like the asteroids in the inner solar system, most kuiper belt comets move in nearly circular orbits that lie roughly in the same plane as the planets

Answer 39

T

Question 40

comets appear to be distributed in all directions from the sun, forming a spherical shell around the solar system called __________

Answer 40

oort cloud

Question 41

small solid particle that travels through space

Answer 41

Meteoroid

Question 42

3 sources of meteoroid

Answer 42

1) interplanetary debris that was not gravitationally swept upcbu the planets during the formation of the solar system 2) material from the asteroid belt 3) solid remains of comets that once traveled mear Earth's orbit

Question 43

T or F few meteoroids are believed to be fragments of the moon or possibly mars, that were ejected when am asteroid impacted these bodies

Answer 43

T

Question 44

Those that do enter the earth's atmosphere amd burn up are called _________. The light that we see is caused by __________ betweem the particle and the air, which produces heat.

Answer 44

Meteors, friction

Question 45

results when earth encounters a swam of meteoroids travelimg in the same directiom and at mearly the same speed as earth

Answer 45

meteor showers

Question 46

T or F the notable perseid meteor showers occur each year around august 12 amd is believed to be the remains of the comet 1862 III

Answer 46

T

Question 47

a meteoroid that actually reaches the earth's surface

Answer 47

Meteorite

Question 48

meteorites contaim silicate minerals, they are subdivided into chondrites and anchondrites

Answer 48

Stony

Question 49

meteorites contain a high percemtage of iron and nickel compounds. they are created in the rupture of asteroids

Answer 49

Iron

Question 50

contains similar quantities of iron, nickel and silicates

Answer 50

Mesosiderites