True or False
A light-year is a measurement of time.
False- Distance
Parallax is used to determine a star's
A. Distance from Earth
B. Composition
C. Temperature
D. Brightness
A. Distance from Earth
The brightness of a star as seen from Earth is called what?
A. Parallax
B. Absolute brightness
C. Apparent brightness
D. Light-year
C. Apparent brightness
The most massive stars collapse to form __________ when they die.
(spiral galaxies, elliptical galaxies, irregular galaxies, quasars, black hole, supernova, supergiant, nebula, red giant, dark matter, and dark energy)
Black Hole
Another word for absolute brightness: _________
Luminosity
Scientists classify stars based on temperature and size.
True
Which of the following is a major difference between elliptical galaxies and spiral galaxies?
A. Elliptical galaxies have almost no gas or dust between stars.
B. Elliptical galaxies vary more in shape than spiral galaxies.
C. Spiral galaxies have almost no gas or dust between the stars.
D. Spiral galaxies contain old stars.
A. Elliptical galaxies have almost no gas or dust between stars.
A dying high-mass can suddenly explode, becoming a what?
A. nebula
B. protostar
C. black hole.
D. super nova
D. Super nova
A dying high-mass star can suddenly explode to become a ____________
(spiral galaxies, elliptical galaxies, irregular galaxies, quasars, black hole, supernova, supergiant, nebula, red giant, dark matter, and dark energy)
Supernova
Name the scientist who supported the theory of the big bang.
Edwin Hubble
We live in an irregular galaxy.
False- Spiral
A star is born when __________
A. A nebula expands
B. A protostar begins to cool.
C. Helium and Oxygen combine
D. Nuclear fusion stars
D. Nuclear fusion stars
Many stars belong to larger groups called what?
A. star cluster
B. eclipsing binary
C. binary stars
D. galaxies
A. Star cluster
Astronomers have discovered we can only see very little of the mass of galaxies where the remaining mass is known as ___________.
(spiral galaxies, elliptical galaxies, irregular galaxies, quasars, black hole, supernova, supergiant, nebula, red giant, dark matter, and dark energy)
Dark matter
What is the force that allows the planets to orbit the sun?
Gravity
Our solar system formed 15 million years ago.
False- 5 billion
A. Big crunch theory
B. Collision- ring theory
C. Galactic expansion theory
D. Big Bang Theory
D. Big Bang Theory
Gravity pulled most of the gas into the center of the disk, where the gas eventually became hot and dense enough to nuclear fusion to begin and what was born?
A. The Sun
B. Inner planets
C. Outer planets
D. The Universe
A. The Sun
Galaxies that appear to have a bulge in the middle and arms that move outward are called ____________.
(spiral galaxies, elliptical galaxies, irregular galaxies, quasars, black hole, supernova, supergiant, nebula, red giant, dark matter, and dark energy)
Spiral galaxies
What devise is used to determine the chemical composition in stars?
Spectrograph
Dark Matter is the force that is causing the expansion of the universe to accelerate.
False- Dark Energy
Which of the following is not a characteristic of stars?
A. Size
B. Temperature
C. Texture
D. Chemical Composition (what it's made of).
C. Texture
What uses powers of ten to write very large or small numbers in shorter form?
A. Scientific method
B. Scientific notation
C. Scientific notes
D. Exponents
B. Scientific notation
Galaxies that are active young galaxies with giant black holes at their centers are known as __________.
(spiral galaxies, elliptical galaxies, irregular galaxies, quasars, black hole, supernova, supergiant, nebula, red giant, dark matter, and dark energy)
Quasars
What galaxy is Earth apart of?
Milky Way