Astro 001 3Rd Exam

Front 1

Jupiter has the shape of an oblate spheroid because of its rapid rotation

Back 1

True

Front 2

The Great Red Spot on Jupiter is aused by cyclone-like weather conditions

Back 2

True

Front 3

Jupiter radiates less enefy than it gets from the sun

Back 3

False

Front 4

Jupter is the most massive planet in the solar system

Back 4

True

Front 5

Io has volcanoes that are still active today

Back 5

True

Front 6

Jupiter's gravitational influnece causes gaps in the ring system of Saturn

Back 6

False

Front 7

Jupiters gravitational influence causes precession of the rotation axis of mars

Back 7

true

Front 8

saturn's rings contain a large gap called the kirkwood gaps

Back 8

false

Front 9

the encke gap has an orbital resonance with mimas

Back 9

true

Front 10

saturn's atmospere is most similar to the atmosphere of jupiter

Back 10

true

Front 11

small objects are ripped apart by tidal forces within the roche limit of a planet

Back 11

true

Front 12

enceladus has a perfect albedo because its ice volcanos continually keep the surface clean

Back 12

true

Front 13

the huygens probe studied the atmospheres of the moons of saturn

Back 13

true

Front 14

mimas orbits saturn within its ring system

Back 14

true

Front 15

titan is special because it has a thick atmosphere composed mostly of oxygen

Back 15

false

Front 16

THE RINGS AROUND URANUS WERE DISCOVERED BY STELLAR OCCULTATION

Back 16

TRUE

Front 17

the rotation xis of uranus is tilted by 98 degrees as it orbits the sun

Back 17

true

Front 18

uranus has a ring system that is very small and faint

Back 18

true

Front 19

uranus and neptune are not similar in any way

Back 19

false

Front 20

neptune has a ring system with only a few rings

Back 20

true

Front 21

the largest moon of neptune has an atmosphere containing nitrogen

Back 21

true

Front 22

there are cyclones in neptunes atmosphere similar to those on mercury

Back 22

false

Front 23

neptune was discovered because of its gravitational effect on the orbit of uranus

Back 23

true

Front 24

dwarf planets have direct orbits around the earth

Back 24

false

Front 25

ceres pluto eris haumea and makemake are now dwarf planets

Back 25

true

Front 26

dwarf planets have not cleared the region near their orbits

Back 26

true

Front 27

dwarf planets are nearly round in shape

Back 27

true

Front 28

fluorescence is the process by which ultraviolet radiation is converted to visible light in a comet

Back 28

true

Front 29

sublimation is the process by which the material in a comet changes from solid to gas

Back 29

true

Front 30

comets contain fragments of simple molecules ( water carbon dioxide carbon monoxide

Back 30

true

Front 31

the gas tail of a comet always points directly towards the sun

Back 31

false

Front 32

most asteroids are found in the asteroid belt

Back 32

true

Front 33

a meteoroid is solid material that travels through the solar system

Back 33

true

Front 34

trojan asteroids are co-orbital with jupiter

Back 34

true

Front 35

the asteroid belt is located beyond the orbit of neptune

Back 35

false

Front 36

The kuipeer belt is located between the orbits of earth and venus

Back 36

false

Front 37

the oort cloud is located 1000 au to 50 000 au from the sun

Back 37

true

Front 38

long period comets come from the oort cloud and have randomly oriented orbits

Back 38

true

Front 39

short-period comets come from the kuiper belt

Back 39

true

Front 40

the interior of the sun is completely gaseous

Back 40

true

Front 41

the temp at the center of hte sun is approximately 15000000 k

Back 41

true

Front 42

the sun is a star

Back 42

true

Front 43

the two most abundant elements in the sun are oxygen and helium

Back 43

false

Front 44

limb darkening causes the edge of the sun to appear much brighter than the center

Back 44

false

Front 45

the sun rotates differentially with rotation fastest at the equator

Back 45

true

Front 46

the visible surface of the sun is called the photosphere

Back 46

true

Front 47

the temp of the photosphere is 5800 k

Back 47

true

Front 48

we need to use an infrared telescope to see the corona of the sun

Back 48

false

Front 49

sunspots are associated with the photosphere

Back 49

true

Front 50

the temperature of the corona is about 10 to the 6th K

Back 50

true

Front 51

the chromosphere is a layer of the suns atmosphere

Back 51

true

Front 52

sunspots have very weak magnetic fields

Back 52

false

Front 53

the solar wind escapes from the sun through coronal holes

Back 53

true

Front 54

prominences are enormous arcs of hot gas that move along the magnetic field

Back 54

true

Front 55

coronal mass ejections are parcels of gas that take 3-5 days to travel from the sun to earth

Back 55

true

Front 56

the visible surface of the sun is called the photosphere

Back 56

true

Front 57

the temp of the photosphere is 5800 k

Back 57

true

Front 58

we need to use an infrared telescope to see the corona of the sun

Back 58

false

Front 59

sunspots are associated with the photosphere

Back 59

true

Front 60

the temperature of the corona is about 10 to the 6th K

Back 60

true

Front 61

the chromosphere is a layer of the suns atmosphere

Back 61

true

Front 62

sunspots have very weak magnetic fields

Back 62

false

Front 63

the solar wind escapes from the sun through coronal holes

Back 63

true

Front 64

prominences are enormous arcs of hot gas that move along the magnetic field

Back 64

true

Front 65

coronal mass ejections are parcels of gas that take 3-5 days to travel from the sun to earth

Back 65

true

Front 66

if the gravitational force is less than the outward gas pressure, a star will expand

Back 66

true

Front 67

if hte gravitational force is equal to the outward gas pressure a star will be stable

Back 67

true

Front 68

the sun is shirinking in size right now

Back 68

false

Front 69

if the grav force is greater than the outward gas pressure a star will contract

Back 69

true

Front 70

the first neutrino detectors were built 40 years ago

Back 70

true

Front 71

we can see inside the sun and know exactly what is happening in the core

Back 71

false

Front 72

solar neutrinos have no mass and they can pass through te earth very easily

Back 72

true

Front 73

we study solar neutrino because we need to check that hte predicted chemical reactions inside the sun are correct

Back 73

true

Front 74

RR Lyrae and Cepheid variable stars increase and decrease in size every day

Back 74

true

Front 75

RR Lyrae and Cepheid variables shows that temp decreases as the luminosity increases

Back 75

true

Front 76

spectroscopic parallax is used to measure distances of starts taht are as far as 10000 pc

Back 76

true

Front 77

radar can be used to measure distances beyond our galaxy

Back 77

false

Front 78

the temp of a star can be found from its spectral type

Back 78

true

Front 79

the temp of a star can be found from the stefan boltzmann law

Back 79

true

Front 80

the temp of a star can be found from its blackbody curve

Back 80

true

Front 81

the temp of a star can be found from stellar parallax

Back 81

false

Front 82

the main sequence on the H-R diagram is the place where dwarf stars are located

Back 82

true

Front 83

the main sequence on the H-R diagram is the place where sun is located

Back 83

true

Front 84

the main sequence on the H-R diagram is the place where stars are found

Back 84

true

Front 85

the main sequence on the H-R diagram is the place where are burning helium in their cores

Back 85

false

Front 86

cool dwarf stars are found on the upper main sequence

Back 86

false

Front 87

supergiants are the largest stars

Back 87

true

Front 88

hot dwart stars have higher mass and short lifetimes

Back 88

true

Front 89

cool dwarf stars have lower mass and long lifetimes

Back 89

true

Front 90

the proton-proton chain is a fusion reaction

Back 90

true

Front 91

the cno cycle is a fission reaction

Back 91

false

Front 92

in cool stars, hydrogen is converted to helium by the p-p chain

Back 92

true

Front 93

in hot stars hydrogen is converted to helium by the CNO cycle

Back 93

true

Front 94

carbon is converted directly to helium i nthe triple-alpha reaction

Back 94

false

Front 95

the alpha particle is a helium nucleus

Back 95

true

Front 96

during alpha capture, new atoms are made by adding an alpha particle

Back 96

true

Front 97

in the r-process, new atoms are made by capturing neutrons rapidyl

Back 97

true

Front 98

a white dwarf has a radius of about the same size as earth

Back 98

true

Front 99

a white dwarf cannot have a mass greater tahn 1.4 solar masses

Back 99

true

Front 100

a white dwarf is composed mostly of degenerate electrons

Back 100

true

Front 101

a white dwarf is the same as a normal dwarf star

Back 101

false

Front 102

one star periodically blocks the light from its ocmpanion star in a spectroscopic binary

Back 102

false

Front 103

you can only observe the orbit of one star in an astrometric binary because the companion star is not bright enough to be seen

Back 103

true

Front 104

you can observe cyclic doppler shifts of the spectral lines in a spectroscopic binary

Back 104

true

Front 105

you an obnserve the orbits of both stars in a visual binary

Back 105

true

Front 106

a contact binary contains 2 stars that are touching

Back 106

true

Front 107

the inner lagrangian point is the place wher ehte roche lobes touch

Back 107

true

Front 108

a detached binary contains 2 stars that are well within their roche lobes

Back 108

true

Front 109

in a semi-detached binary both stars fill their roche lobes

Back 109

false

Front 110

a millisecond pulsar spins once every thousandth of a second

Back 110

true

Front 111

gas transferred from a companion star can cause a neutrons tar to spin more slowly than normal

Back 111

false

Front 112

isolated pulstars rotate once every second

Back 112

true

Front 113

pulsars in binary star systems can rotate one thousand times every second

Back 113

true

Front 114

gamma ray bursts may be produced by the merger of 2 neutron stars

Back 114

true

Front 115

gamma ray bursts may be produced by the collapse of a single star in a hypernova outburst

Back 115

true

Front 116

gamma ray bursts ahve been detected by the swift telescope

Back 116

true

Front 117

gamma ray bursts have energies in the infrared part of the electromagenetic spectrum

Back 117

false

Front 118

opal like minerals found on mars suggest that a lot mroe water than expected flowed on mars whitin the last 2 billion years

Back 118

true

Front 119

the spitzer infrared telescope has taken a pic of the dust sheell around comet colmes

Back 119

true

Front 120

100s of spots are visible on the face of the sun right now

Back 120

false

Front 121

the closest planetery system system to the solar system may hv 2 asteroid belts

Back 121

true

Front 122

deductive reasoning an be applied when the results are reproducible every single time

Back 122

true

Front 123

inductive reasoning is based on perfectly predictable results

Back 123

false

Front 124

a direct photograph of an exoplanet systems has been taken with the hubble space telescope

Back 124

true

Front 125

the corot satellite has discovered an objet that is the size of jupiter but could be a brown dwarf that burns lithium

Back 125

true