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Astronomy Unit 5

1.1 ________________ is the change in direction of Earth's axis. Precession
1.2 _______________ describes imperfections in the described cone. Nutation
1.3 ______________ is when the Sun seems to move. Ecliptic
1.4 The _____________ is a rough calendar. zodiac
1.5 ______________ is when solar wind and magnetic field interact. Bow shock
1.6 The _______________ is the barrier to meteors and ultraviolet rays. stratosphere
1.7 The _______________ is a special oxygen molecule. ozone
1.8 The ______________ is also the mesosphere. noctilucent cloud
1.9 The _______________ is a radio reflector. ionosphere
1.10 A _______________ is the lighted hemisphere that cannot be seen. new moon
1.11 The _______________ was created in A.D. 1582. Gregorian calendar
1.12 Homosphere means "_____________". sam globe
1.13 Troposphere means "_____________". changing globe
1.14 Heterosphere means "____________". different globe
1.15 Stratosphere means "______________". layer globe
1.16 Mesosphere means "_______________". middle globe
1.17 Thermosphere means "______________". heat globe
1.18 Exosphere means "_________________". outer globe
1.19-1.22 study in book.
1.23 Since there is _________ of a day's length, problems arise when a set _______________ is established to count a year of them. variation; measurement
1.24 We us an ______________ of a day's length for calendrical purposes. average
1.25 The distance of 148,800,000 km has been established as the "_____________________". astronomical unit
2.1 An ________________ is a mass. aggregate
2.2 __________________ is a large heap of loose lava. Cinder cone
2.3 ________________ is scattered remains. Debris
2.4 ______________ is to wear away gradually. Erode
2.5 To ___________________ is to come between. interpose
2.6 To _______________ is to spring back. recoil
2.7 _________________ is close to Earth. Perigee
2.8 __________________ named lunar mountains. Selenographia
2.9 _________________ means Sea of Showers. Mare Imbrium
2.10 _________________ means Sea of Clouds. Mare Nubium
2.11 _________________ means Sea of Storms. Mare Procellarum
2.12 ________________ means Bay of Rainbows. Sinus Iridum
2.13 The moon makes one rotation for each ______________. revolution
2.14 Many of the _______________ mountain ranges bear _____________ of Earth's mountain ranges. Lunar; names
2.15 ______________________ used poetic names for the Moon's maria. Giambattista Riccioli
2.16 The Moon's far side is far more __________________ than the near side. heavily cratered
2.17 Both the moon and the Sun contribute to _____________________ on Earth. tidal movements
2.18 The maximum high tide is called the __________________. spring tide
2.19 The minimum high tide is called the _________________. neap tide
2.20 Whenever the Moon passes partially or wholly into Earth's shadow cone, a _______________ eclipse occurs. lunar
2.21 A ______________ occurs whenever the Moon interposes between Earth and Sun. solar eclipse
2.22 Whenever the Moon's shadow cone fails to reach Earth, an _____________________ occurs. annular eclipse
2.23 T/F A lunar shadow cone has only one area of darkness. F
2.24 T/F Sunlight shines through lunar valleys in a display known as Selene's necklace. F-Bailey's beads
2.25 T/F Librations allow us to see 59% of our Moon's surface. T
3.1 ________________ means opposite. Contrary
3.2 __________________ is a distinctive mark. Designation
3.3 __________________ is written evidence. Documentation
3.4 A __________________ is a small,thin piece. flake
3.5 _________________ means caused by motion. Kinetic
3.6 __________________ is the fourth state of matter. Plasma
3.7 ________________ means to crush to powder. Pulverize
3.8 ______________ means to spread out from the center. Radiate
3.9 __________________ is a layer of rock. Stratum
3.10 _______________ is to look at carefully. Survey
3.11 ________________ means a large number of things. Swarm
3.12 A _____________ is a small body of matter from outer space that enters the earth's atmosphere, appearing as a streak of light. meteor
3.13 A _____________ is an object in space. meteoroid
3.14 A _______________ is an object that has hit the Earth. meteorite
3.15 Iron meteorites are ____ of the total. 7%
3.16 Stony-iron meteorites are ______ of the total. 1%
3.17 Stony meteorites are _________ of the total. 92%
3.18 A meteorite may be called a ______________ if it contains silicate crystals. chondrite
3.19 Meteor showers occur when ____________________________ swarms of meteoroids. Earth's orbit takes it through
3.20 Three especially prominent meteor showers are: 1. ____________ 2. ________________ 3. ________________ Perseid, Orionid, Leonid
3.21 Meteoroids result from debris left behind by _______________. comets
3.22 Meteorite ________________ are gathered shortly after a meteorite has struck. falls
3.23-3.25 study in book.
4.21 _____________________ used a pendulum to show Earth's rotation. Jean Foucault
4.22 __________________ led the science team that discovered Earth's radiation belts. James Van Allen
4.23 ____________________ sponsored the calendar we now use. Pope Gregory XIII
4.24 ___________________ applied poetic names to lunar features. Giambattista Riccioli
4.25 ____________________ described the sparkling seen as the Moon covers the photosphere. Francis Baily
4.26 __________________ first correctly voiced the correct concept of meteorites. Ernst Chladni
4.27 __________________ made the first chemical analysis of a meteorite. Edward Howard
4.28 List three of Earth's six movements. 1. _____________________ 2. ____________________ 3. _______________________ Earth's axis precesses; The axis nutates; Revolution around the Sun to produce the yearly cycle
4.29 Modern astronomers must contend with a very high degree of _____________ in their work. precision
4.30 _______________ result from the Moon's gravitational pull on Earth's poles. Nods
4.31 At the _____________, a majority of the solar wind is deflected around Earth. bow shock
4.32 Since there is variation of a day's length, problems arise when a set ___________________ is established to count them. measurement
4.33 Winter arrives north of the equator on or about _____________. December 22
4.34 Summer arrives north of the equator on or about _______________. June 21
4.35 The name of the calendar we now use is the _______________ calendar. Gregorian
4.36 The northern limit of the Sun's direct rays is the Tropic of _______________. Cancer
4.37 "______________" means "equal night." Equinox
4.38 We use an ______________________ for calendrical purposes. average solar day
bow shock, stratosphere and what role it plays, why important mixture of gases, lunar eclipse, meteor showers How much time is a galactic year, synodic month, nutation, precession, sidereal month
Created by: jhincks