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Ch 21.3 -4 DC
Ch 21.3-4 DC
11
Science
8th Grade
03/04/2013

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Cards

Term
A neutron star
Definition
what is left of a giant star after it explodes. it is smaller and denser than white dwarfs.
Term
A nebula
Definition
a large amount of gas and dust spread out over an immense volume.
Term
A protostar
Definition
the gas and dust pulled together by gravity making a cloud; the earliest stage of a star’s life.
Term
White Dwarf
Definition
the blue-white hot core left behind when a star expands and becomes a giant or supergiant.
Term
Black dwarf
Definition
a dead white dwarf that has stopped glowing.
Term
a supernova
Definition
An explosion of a dying giant or supergiant star.
Term
Black Hole
Definition
formed if there is too much material left after a supernova and gravity is so strong it pulls the gas inward.
Term
Eclipsing binary
Definition
when one star in a binary system blocks the light from the other star.
Term
Extrasolar planets
Definition
any planetary body that is outside the solar system and that usually orbits a star other than the Sun.
Term
Binary Systems
Definition
star systems with two stars (double stars).
Term
Galaxies
Definition
giant structures that contain hundreds of billions of stars.
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