standard 1 objective 2 study notes astronomy 2. 1 _____ is the most likely destination for manned...
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Standard 1 Objective 2Study Notes
Astronomy 2
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1
• _____ is the most likely destination for manned _________ and surface exploration because it has some conditions ______ to Earth.
Mars voyages
similar
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2
• Liquid water and oxygen/carbon dioxide in the atmosphere are conditions on _______ that support the ____________.
Earthbiosphere
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3
• The _______ solar system object is the _____.Sunlargest
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4
• The ______ ______ and heat from the newly formed sun affected the composition of the inner planets of the solar system by causing them to lose most of their ______ ________.
solar wind
lighter elements
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5
• A rock sample containing Strontium 30 is tested and ___% of the original Strontium remains. The Strontium 30 has undergone two _________.
25
half-life’s
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6
• The ____ of the solar system is estimated by scientists by dating __________ elements.
ageradioactive
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7
• A spherical region that surrounds the solar system and that contains billions of ______ is the ______ cloud.
cometsOort
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8
• A _______ is made up of______ , dust and gas bound together by gravity.
galaxy stars
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9
• A rotating cloud of ____ and _____ from which Earth’s solar system formed is called the _______ _______.
gas dust
solar nebula
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10
• The two inner planets most ______ in size, mass, and ________ are Venus and _______.
alikedensity Earth
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11
• The _____ dense planet in the solar system is ________.
leastSaturn
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12
• The factors that contribute to _________ daily temperature fluctuation of about 600°C are the planet’s slow rotation and its ______ proximity to the sun.
Mercury’s
close
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13
• _______ volcanoes are larger than those of Earth because Mars has no moving ________ plates.
Mars’stectonic
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14
• Small bodies that _____ planets are called ______.
orbitmoons
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15
• About ___% of all matter contained in the solar nebula now exists in the _____.
99sun
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16
• When early Earth’s atmosphere formed, _______ and _________ gases were lost because Earth’s gravity was too _____.helium
weakhydrogen
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17
• ______ is NOT considered a major planet by astronomers.Pluto
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18
• _______ is a planet that experiences a runaway ___________ effect.
Venusgreenhouse
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19
• The right combination of ___________, water, and _______ supports _____ on Earth.
temperatureoxygen life
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20
• _________ is a planet that is similar to ______ in terms of its size and mass.Neptune Uranus
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21
• The _____ atmosphere developed when many ________ eruptions released large amounts of gases in a process called outgassing.
earlyvolcanic
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22
• The ________ belt can be found between the two planets Mars and Jupiter.
asteroid
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23
• A ____-_____ the distance light travels in a year.
light year
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24
• From _________ to the largest in size would be the Solar System, Milky Way Galaxy, and the ________.
smallest
Universe
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25
• ___________ substances are used by scientists to measure the ____ of Earth because they give off radiation at a predictable, steady ____.
Radioactiveage
rate
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26
• The _____ abundant atmospheric gases found on the outer planets are _________ and _______.
mosthydrogen
helium
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27
• The solar system is much _______ than the ______ _____ galaxy.
smallerMilky Way
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28
• _____ is most like Earth because it has an __________ and moderate ____________.Mars
temperaturesatmosphere
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29
• The Earth’s atmosphere and the _______ Earth is from the sun combine to create an _______ rich atmosphere.
distance
oxygen
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The End!!!