Exam (elaborations)
EARTH SCIENCE EXAM QUESTIONS AND ANSWERS 2024
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EARTH SCIENCE EXAM QUESTIONS AND ANSWERS 2024
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EARTH SCIENCE EXAMnebula - ANSWERS-A large cloud of dust and gas in space
protostar - ANSWERS-A contracting cloud of gas and dust with enough mass to
form a star
black hole - ANSWERS-An object whose gravity is so strong that nothing, not even
light, can escape
supergiant - ANSWERS-Life cycle stage of a massive star where the core reaches
extremely high temperatures, heavy elements form by fusion, and the star
expands.
binary star - ANSWERS-a star system with two stars
eclipsing binary - ANSWERS-A system in which one star periodically blocks out
light from another star.
open cluster - ANSWERS-Groups of up to a few thousand stars loosely held
together by gravity
, globular cluster - ANSWERS-a tight group of stars that looks like a ball and
contains up to 1 million stars
galaxy - ANSWERS-A huge group of single stars, star systems, star clusters, dust,
and gas bound together by gravity
spiral galaxy - ANSWERS-A galaxy with a bulge in the center and very distinctive
spiral arms. Our Milky Way is a spiral galaxy.
elliptical galaxy - ANSWERS-A galaxy shaped like a round or flattened ball,
generally containing only old stars.
irregular galaxy - ANSWERS-A galaxy that does not have a regular shape.
quasar - ANSWERS-An enormously bright, distant galaxy with a giant black hole at
its center.
universe - ANSWERS-All of space and everything in it.
Cosmic background radiation - ANSWERS-The electromagnetic radiation left over
from the big bang
Big bang - ANSWERS-The initial explosion that resulted in the formation and
expansion of the universe
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