Download REVIEW: STAR`S TEST

REVIEW: STAR’S TEST 2016
What force causes particles of stellar dust to become attracted to each other ? ____gravity_____
The most widely held astronomical theory about the origin of the universe is the
Big Bang
theory.
The fact that the spectra of stars are shifted towards the red suggests that the stars are moving _away____
Diagram the correct sequence of a star’s life cycle.
Write the formula for a fusion reaction.
H + H
He + stuff
What do each of the letters stand for in the formula E=mc2 . E energy
M matter
C speed of light
Explain how the e and m are related. A small amount of ___matter (stuff)____ can become a huge amount of ___energy__
What is the speed of light ?
186,000 miles per second
List the visible light from longest to shortest wavelengths.
red
orange
yellow
green
blue
indigo
violet
What happens to white light as it passes through a prism ? refracts (bends)
Which color refracts the most and least ? most violet
least red
What is thought to be at the center of all galaxies ? ____black hole___
What is the name of our galaxy ? _____Milky Way_________
Approximately 90% of the visible universe’s mass is composed of ___hydrogen___
In the H-R diagram, stars are classified on the basis of
size (brightness) __________
and ___color (temperature)___
A cloud of gas and dust in which a star is born is called a ____nebula___________
On the H-R Diagram which group do most stars fall?
The actual brightness of a star is its
_absolute___
Main Sequence__________
magnitude.
How bright a star looks from Earth is called _______apparent_____ magnitude.
Blue stars are hotter
than red stars.
What factor determines a star’s color ? _______surface temperature______________________________
The apparent magnitude of a star tells you how bright the star is as viewed from
A nebula is a huge cloud of gas, primarily composed of hydrogen
A nebula becomes a star when _______fusion takes place______________
Our sun is what color ? _____________yellow____________________
.
Earth
.
Using the H-R Diagram below, answer the following questions:
White dwarfs have
high
Supergiants have low
temperature and
low
temperature and high
A star with an absolute magnitude of -6 is
brighter
absolute magnitudes
absolute magnitudes
than a star with an absolute magnitude of +2.
Answer the next questions using the following charts:
What is the apparent magnitude of the sun ? ________-26.5__________
What is the apparent magnitude of Jupiter ? _______-2.0_________________________
How much brighter is the sun than Jupiter ? ____10,000,000,000_______________________
Can a 15 cm telescope see an object with an apparent magnitude of 18.5 ? ________no_________________
The top of the diagram shown below shows the spectrum of 4 elements. Use this diagram to determine which
elements are in the star shown in the bottom of the diagram.
Mercury, helium, hydrogen
What looks like a potato, orbits the sun between Mars and Jupiter, and is made of rock ? ______asteroid_______________
A rock that hits the Earth’s surface is called a ______meteorite______.
A rock that is flying through space is called a _________meteoroid________.
A rock that burns up in our atmosphere is also known as “shooting star” _______meteor_____.
A _____comet______ grows a coma and tail as it nears the sun. It orbits the sun.
The element that is found in space rocks that is not common on Earth _____iridium___________.