Science Mid-Year Test part 1
What is the correct color order of the temperature of the stars in order from hottest cordless
Blue, white, yellow, red-orange, red
What are the characteristics used to classify stars
Color, temperature, size, composition, and brightness
Electromagnetic spectrum from ________ wavelength to _______
long wavelengths to short wavelength radio waves
Parallax is a method of estimating the distance of ________stars
nearby
6 different types of radio waves
radio, infrared, visible light, ultraviolet, x-ray, and gamma
What is the size of stars from largest to smallest
supergiant, giant, medium, white dwarf, and neutron
A light year is the unit of ______ (the ______ it takes light to travel in a year
Distance and Kilometers
Quasar
Distant galaxy with the giant black hole at center
When is a star born
When the contracting gas and dust from a nebula becomes so dense and hot that nuclear fusion starts
Astronomers often use _______ to just describe sizes and distances in the universe
Scientific notation
Temperature of stars from hottest to coolest
50,000, 20,000, 10,000, 6,000, 5,000, 3,000
What does a start become when it runs out of mass
A White dwarf, a Neutron star, or a Black hole
Dark energy
A mysterious force that appears to be causing the expansion of the universe to accelerate
An H-R diagram is a graph of stars' temperature and ________
Absolute brightness
refracting telescopes use ______________ to reflect the light
Convex lenses
reflecting telescopes use ______________ to reflect the light
Curved mirror
The main factor that affects the evolution of the star is it's
Mass
The most common chemical element in most stars
Hydrogen
Where in our galaxy's does most star formation take place
In the arms of the spiral galaxy
The end of the stars life depends on it
Mass
Dark matter
Matter that does not give off electromagnetic radiation
Where are observatories located
Mountaintops or in space
Life Cycle of a star
Nebula- protostar- red giant or supergiant- white dwarf, neutron star or black hole
Pulsars are kind of _______ star
Neutron
3 different types of telescopes
Radio, Reflecting, Refracting
Pulsar
Spinning neutron star
What type of galaxy is our solar system
Spiral galaxy
3 types of galaxies
Spiral, Elliptical, and Irregular
Most stars are members of groups of two or more stars called
Star Systems
What is a solar system called
The Milky way
According to the ________, the universe formed an instant, billions of years ago, in enormous explosion
The big bang theory
Hubbles law
The observation that the farther away a galaxy is, the faster it it moving away
A low mass main sequence star will eventually evolve into a ________
White dwarf
On the H-R diagram the brightest stars are at the ___ and hottest stars are to the ____
top and left
Pulsars and Quasars are ______________
very bright objects in space that are far away
