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