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SCIENCE 7
[SCIENCE] Q4 - Sun, Moon, Eclipse, Earth, Atmosphere,
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The sun's temperature is
15 million
degrees celsius
The sun is in it's
main sequence
estimated at 4.5 billion years old
The sun is mostly composed of
Hydrogen
and
Helium
The
photosphere
is the glowing layer of gasses on the sun's surface
The
chromosphere
is found above the photosphere
the
core
is the inermost layer of the sun
the passage way for all energy being released from the core is called the
radiative zone
Sunspots
are the dark spots that are found on the sun's surface
Solar Prominences look like
loops
on the sun's surface
the sun's diameter is
1,400,00
km
the earth is
4x
the moon
The moon rotates as the
same
rate as the earth
it takes the moon
27 earth days
to complete one orbit around the earth
the moon's surface is a
rocky
surface due to impact of astroids, meteorites, and comets
Lunar Regolith
is the gray powdery dust found on the moon's surface
Highlands are the
light
areas of the moon
Maria
are the dark spots on the moon
Crust is the
outermost
layer of the moon
Mantle is divided into 2:
Rigid Litosphere
and Athenosphere
Core
is the iinnermost layer of the moon and is surrounded by liquid iron
Troposphere
is the lowest layer of the atmosphere, 10-50km above the Earth's surface
Stratosphere is the second layer which contains the
ozone
layer
The
Mesosphere
is the third layer, it is the
coldest
layer which causes meteors to burn here
The thermosphere holds the
ionsphere
The Exosphere is thee outermost layer and contains
hydrogen
and
helium
gasses
The
atmosphere
is important because it filters solar radiations
The Earth is approx.
4.5 billion
years old
The
solid outer
core of Earth is made of iron and nickel.
The Earth's
inner
core is a solid ball of
iron
Glutenburg
discontinuity is between the mantle and crust
The
Mohorovic
discontinuity is between mantle and core
the
crust
is the outermost layer and is 1% of the earth's mass
Continental crust
can be described as old and thick
Oceanic crust can be described as
young
and
dense
The rotation of the earth takes
24
hours
to complete
The movement around the sun and takes 1 year to complete is called a
revolution.
Equinox
refers to a day with the equal day and night
the
Tropic of
Capricorn
can be found at 23 1/2 S
The Tropic of cancer can be found at
23 1/2
N
The Artic circle can be found at
66 1/2
N
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