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100
What is a parallax?
The apparent change in position of an object.
100
A ______ is an object that orbits a star. a. spiral galaxy b. star c. planet d. solar system
C. planet
100
What does Newton's law of universal gravitation state?
It states that every object in the universe attracts every other object.
100
A _______ is a device that breaks light into colors and produces an image of the resulting spectrum.
Spectrograph
100
What is a nebula?
It is a large cloud of gas and dust spread out in an immense volume.
200
_______ is all of space and everything in it.
The universe
200
Define the term "binary star".
Star systems that have two stars.
200
Define the term "weight".
The measure of force of gravity on an object.
200
_____ is its brightness as seen from Earth. a. apparent change b. change c. apparent brightness d. Earth
C. apparent brightness
200
What is a protostar?
A contracting cloud of gas and dust with enough mass to form a star called a protostar.
300
Scientific notation is using powers of __ to write very small numbers in shorter form. a. 12 b. 14 c. 10 d. 17
C. 10
300
A galaxy is a huge group of single star, ____ systems, star clusters, dust, and gas bound together by gravity.
Star systems
300
What is inertia?
The tendency of an object to resist a change in motion.
300
What is a star's absolute brightness?
Luminosity is the brightness the star would have if it were a standard distance from Earth.
300
What is a white dwarf?
A white dwarf is a blue-white core of the star that is left behind cools.
400
What is a light year?
the distance that light travels in one year.
400
What is an irregular galaxy?
A galaxy that does not have a regular shape.
400
Newtons first law of motion states that an object at (a)___ will stay at rest and an object in (b)____ will stay in motion with a constant speed.
(a) rest (b) motion
400
Define the term "main sequence".
The H-R diagram: which form a diagonal area.
400
What is a supernova?
A supernova is an explosion of star blazes that are a million times brighter.
500
Write 100,000,000,000 in scientific notation.
1.5 x 10^11
500
A _____ is a giant ball of gas. a. solar star b. binary star c. planet cluster d. star
D. star
500
What is an orbit?
The path of an object as it revolves around another object as it revolves around another object in space.
500
A Hertzsprung- Russell diagram can also be called a _______. a. diamond b. triangle c. H-R diagram d. R-H diagram
C. H-R diagram
500
What is a black whole?
It is an object with gravity so strong that nothing, even light, can escape.