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Chapter 4-Jon Dulin
Jon Dulin
30
Astronomy
7th Grade
02/22/2013

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Cards

Term
Constellations
Definition
observed patterns in the night skys
Term
Absolute Magnitude
Definition
is a star with the same ammount of light it gives off
Term
Apparent Magnitude
Definition
light received on earth is the apparent magnitude
Term
Light-Year
Definition
is the distance r=that light travels in one year
Term
Photoshphere
Definition
lowest layer of suns atmosphere and the layer from wich light is given off
Term
Chromosphere
Definition
above photosphere layer extends upward about 200km above the photoshpere
Term
Corona
Definition
The largest layer of the suns atmposphere
Term
Sunspots
Definition
areas of the sun that appear darker because they are cooler
Term
Nebula
Definition
stars begin as a large cloud of gas
Term
Giant
Definition
in the late stage of life cycle a star is called a giant
Term
White Dwarf
Definition
At this stage in a star's evolution it becomes a white dwarf
Term
Super Giant
Definition
Heavier and heavier elemants from by fusion and the star expands into a super giant
Term
Neutron Star
Definition
neutrons can only exist in a dense core
Term
Black Hole
Definition
light cannot escape the region
Term
Galaxy
Definition
a large group of stars gas and dust held together by gravity
Term
Big Bang Theory
Definition
the theory of the formation of the universe
Term
Proxima Centaurri
Definition
is a triple star
Term
How many stars does the Milky Way hold
Definition
1 trillion
Term
Doppler Shift
Definition
wavelenghths of weight are compressed, just as the sound waves from the train's whistle are
Term
Red Shift
Definition
means moving away
Term
True or False Absolute mag is the ammount of light being given off by a starh
Definition
True
Term
Solar Flares
Definition
Go staright up
Term
corona
Definition
outermost layer
Term
Core
Definition
hydrogen fuses into helium energy
Term
Polaris nickname is north star true or false
Definition
true
Term
T/F Hot dense core stage is white dwarf
Definition
True
Term
T/F star expands and cools is a giant
Definition
True
Term
T/F a supergiants stage is formed by heavier and heavier elements by fusion
Definition
True
Term
T/F the gravity from the black hole can see light and can escape
Definition
False it cant escape
Term
T/F a galaxy is not a group of stars
Definition
False it is
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