23.1 The Solar System. The Planets: An Overview Terrestrial planets are relatively small and rocky...
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23.1 The Solar System. The Planets: An Overview Terrestrial planets are relatively small and rocky “Earth like” MercuryVenusEarthMars Jovian planets are
The Planets: An Overview Terrestrial planets are relatively
small and rocky Earth like MercuryVenusEarthMars Jovian planets are
huge gas giants JupiterSaturnUranusNeptune
Slide 3
Continued Pluto does not fit into either category (small &
cold) Size is the most obvious difference between the terrestrial
& Jovian planets The 4 Jovian planets & Pluto are further
from the sun they are called outer planets The terrestrial planets
that closer to the sun are known as inner planets Density, chemical
makeup, & rate of rotation are other ways that the 2 groups
differ
Slide 4
Slide 5
The Interiors of the Planets TP are dense mostly containing
rocky metallic substances & minor amts. Of gases & ices JP
contain large amts. of gases & ices The substances that make up
the planets are divided into 3 groups: Gases (MP -273 degree
Celsius) Rocks (MP above 700 degree Celsius) Ices (Intermediate
MP)
Slide 6
The Atmosphere of the Planets JP have a very thick atmosphere
of hydrogen, helium, methane, & ammonia TP have smaller
atmospheres Planets ability to retain an atmosphere depends on its
mass & temp. (diff. in JP & TP) Moon lacks an
atmosphere
Slide 7
Formation of the Solar System Nebular Theory the sun &
planets formed from a rotating disk of dust & gases As the
speed of the rotating disk increased the disk began to flatten out.
Matter became more concentrated in this center, where the sun
eventually formed Growth of the planets started as solid bits of
matter began to collide & clump together (planetesimals)