Download Chapter 19/20 Vocabulary

Chapter 19/20 Vocabulary
Accretion
the accumulation of matter
Asteroid
a small, rocky object that orbits the sun, usually found in a band between the orbits of
Mars and Jupiter
Big Bang Theory
the theory that all matter and energy in the universe was compressed into an extremely
small volume that 10 to 20 billion years ago exploded and began to expand in all
directions
Black Hole
a object so massive and dense that not even light can escape its gravity
Cluster
a group of stars or galaxies bound by gravity
Comet
a small body of ice, rock, and cosmic dust loosely packed together that follows an
elliptical orbit and that gives off gas and dust in the form of a tail as it passes close to the
sun
Galaxy
a collection of stars, dust, and gas, bound together by gravity
Light-year
the distance that light travels in one year
Nebula
a large cloud of dust and gas in interstellar space
Nebular Model
a model for the formation of the solar system in which the sun and planets condense from
a cloud (or nebula) of gas and dust
Planet
any large body that orbits the sun or other star
Red Giant
a large reddish star late in its life cycle
Satellite
a natural or artificial body that revolves around a planet
Solar System
the sun and all the planets and other bodies that travel around it
Star
a large celestial body that is composed of gas and that emits light
Supernova
a gigantic explosion in which a massive star collapses and throws its outer layers into
space
Universe
the sum of all space, matter, and energy that exist, that have existed in the past, and that
will exist in the future
White Dwarf
a small, hot, dim star that is the left over center of an old star
Peer Tutoring Tracking Sheet
As you study, keep track of the words you are getting right and wrong so you will know which ones you will
need to spend the most time studying. To do this, place a tally mark beside the words you incorrectly identify
during peer tutoring time. The words with the most tallies are the words you will need to spend additional time
studying at home.
WORD
Accretion
Asteroid
Big Bang Theory
Black Hole
Cluster
Comet
Galaxy
Light-year
Nebula
Nebular Model
Planet
Red Giant
Satellite
Solar System
Star
Supernova
Universe
White Dwarf
TALLY
Accretion
Cluster
Asteroid
Comet
Big Bang Theory
Galaxy
Black Hole
Light-year
a group of stars of galaxies
bound by gravity
the accumulation of matter
a small body of ice, rock, and
cosmic dust loosely packed
together that follows an elliptical
orbit and that gives off gas and
dust in the form of a tail as it
passes close to the sum
a small, rocky object that orbits
the sun, usually found in a band
between the orbits of Mars and
Jupiter
a collection of stars, dust, and
gas, bound together by gravity
the theory that all matter and
energy in the universe was
compressed into an extremely
small volume that 10 to 20
billion years ago exploded and
began to expand in all directions
the distance that light travels in
one year
a object so massive and dense
that not even light can escape its
gravity
Nebula
Nebular Model
Satellite
Solar System
Planet
Star
Red Giant
Supernova
a natural or artificial body that
revolves around a planet
a large cloud of dust and gas in
interstellar space
the sun and all the planets and
other bodies that travel around it
a model for the formation of the
solar system in which the sun
and planets condense from a
cloud (or nebula) of gas and dust
a large celestial body that is
composed of gas and that emits
light
any large body that orbits the sun
or other star
a gigantic explosion in which a
massive star collapses and
throws its outer layers into space
a large reddish star late in its life
cycle
Universe
White Dwarf
the sum of all space, matter, and
energy that exist, that have
existed in the past, and that will
exist in the future
a small, hot, dim star that is the
left over center of an old star