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Astronomy 9th

A study stack for my 9th grade astronomy test

QuestionAnswer
Rotation is... Something spinning on an Axis Ex. Earths Rotation
Revolution is.. Something spinning around something, Ex. Moon around Earth, Earth around Sun
Most Common Elements in the universe? Hydrogen and Helium.
A Light Year is... The distance light travels in a year, a unit of measurement.
When the moon is Waxing it is.... Reflecting more and more sunlight.
When the moon is Waning it is.. Reflecting less and less sunlight.
When the moon is Waxing the moon is lit up on the.... Right Side
When the moon is Waning it is lit up on the.. Left Side
Moons Revolution Time is.. 27.3 Days
time it take to go from New to Full moon is... About 14 Days
Terrestrial Planets are.. Planets mostly made of rock and earth.
Gas Planets... Giant planets made of mostly gases.
Inner planets Planets closest to the sun infront of the asteroid belts
Outer Planets Planets furthest from the sun
Asteroids Rocks floating through space containing various minerals.
Asteroid Belt A strip of asteroids around the earth separating inner and outer planets.
Parts of the Comet. Tail Nucleus and Coma.
Which way does the tail point... Away from the sun.
What causes the tail of the comet.... The ice falling off as dust as it moves through space.
What is the Photosphere? The stars outer shell...
What is the corona? The outer most atmosphere of the sun.
What are solar winds? Solar energy released from the suns atmosphere.
Sunspots Cooled spots on the sun trapping solar energy underneath.
Source of the Suns energy FUSION!
Absolute VS Apparent Magnitude Apparent: brightness from earth Absolute: True brightness
90% of stars on the HR Diagram are... Main Sequence Stars.
Nebula Factory's or areas that produce stars filled with Hydrogen and lose gases that eventually form stars.
Red Giant Older stars average stars that expand
Red Supergiant Older more massive stars that expand.
Supernova Massive explosion that happens when an high mass star grows older, after Red Supergiant
Black Dwarf Final stage of an average mass star, it turns into a massive cool ball of iron.
What causes stars to have different life cycles? Mass
A proto-star must do what to become stars Fuse
Milky Way Our galaxy
Elliptical Circular Galaxy
Spiral Spiral shaped Galaxy Ex. Milky Way
Irregular Any other shape of galaxy than spiral and elliptical
What is at the center of a galaxy? A Black hole
A Neutron Star is made up of only... Neutrons
Black Holes Have High... Gravity
Supernovas are... Massive Explosions of High mass stars
Yellow Stars are... Average heat stars
Blue Stars are.... Incredibly Hot Stars
Red Stars are... Cooler Stars
Created by: LilFruitPunch
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