3rd Nine Weeks Exam Reveiw Part 3: Question Preview (ID: 24082)

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_________ is an object whose gravity is so strong that nothing can escape it.
a) black hole
b) neutron star
c) white dwarf
d) pulsar

A huge group of single stars, star systems, star clusters, dust and gas bound together by gravity are
a) nebula
b) galaxy
c) universe
d) constellation

The sun is part of a ______ galaxy.
a) irregular
b) quasar
c) elliptical
d) spiral

The most massive stars collapse to from _______ when they die.
a) black dwarfs
b) white dwarfs
c) neutron stars
d) supernovas

Astronomers typically measure the distance to stars in
a) kilometers
b) miles
c) light-years
d) astronomical units

Why are many large optical telescopes located on mountains?
a) to be closer to city lights
b) because it is easier to build telescopes on mountains
c) to be closer to the stars
d) to be above part of the atmosphere

The solar system was formed from
a) a black hole
b) an enormous explosion
c) a giant cloud of gas and dust
d) an expanding galaxy

A star is born when
a) a nebula expands
b) helium and oxygen combine
c) nuclear fusion starts
d) a protostar begins to cool

The Milky Way galaxy is an example of a(n)
a) spiral galaxy
b) globular cluster
c) elliptical galaxy
d) irregular galaxy

What color are the coolest stars?
a) blue-white
b) yellow
c) red
d) orange

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