Waves
If a wave has low frequency, the wavelength is _____.
bigger, greater, more, longer
Which waves have the longest wavelength?
radio waves
In a star's life cycle, what is formed right after a nebula containing gas and dust collapses?
protostar
What is the "Big Bang" a theory about?
a. how earth is expanding
b. how space is becoming a black hole
c. how the moon and stars are colliding
d. how the universe was formed
d. how the universe was formed
Which galaxy is earth located in?
Milky Way Galaxy
What is the height of the wave known as?
Amplitude
What does infrared tell us?
heat, temperature
Based on the H-R diagram, which stars would be hot and dim?
supergiants, giants, main sequence, or white dwarfs?
white dwarfs
Andromeda galaxy contains a concentrated bulge of matter in the middle and arms that spiral outward. Most of the stars in this galaxy form in the arms. What type of galaxy is Andromeda?
spiral
The Hertzsprung-Russell diagram tells us 4 different characteristics about stars:
luminosity, temperature, color, size, and/or location in their life cycle (main sequence, white dwarf, giant, supergiant)
What types of radiation can be damaging? (From the electromagnetic spectrum)
gamma rays, x-rays, or ultraviolet
Shamari is making transverse waves with a rope. She is moving the rope as quickly as she can, so she isn't able to increase frequency anymore. What else can she do to increase the energy of the wave?
increase the amplitude
Which describes a star that is just starting to form?
a. ball of plasma where fusion is beginning
b. a collection of gas and dust
c. running out of fuel and collapsing
d. being in a balanced and stable state
b. a collection of gas and dust
elliptical
What are some characteristics of a spiral galaxy?
it has a bulge in the middle and arms that spiral outward.
its arms contain gas and dust and are home to many stars.
Waves with high energy have ____ and ____.
high frequency and high amplitude
At the start of a game, the stadium crown does the wave for 5 minutes. During this time, 10 wave cycles make their way around the stadium. At halftime, they do the wave for 5 minutes. This time, 15 cycles occur. What changed about the wave?
Frequency increased
Sirius B is a small and dense star that used to be much larger and shone a bright blue. Now, it is so dense that even though it is smaller than out sun, it contains the same amount of mass as our sun. Sirius B was the first star of its kind to be discovered. What type of star is Sirius B currently?
white dwarf
SMC is a dwarf galaxy that makes up part of the Magellanic Clouds. It has not definite shape. The SMC contains several million stars, along with gas and dust. What type of galaxy is the SMC?
irregular
Based on what scientists have observed about the universe, which description of the universe is plausible?
a. the universe may expand forever, therefore galaxies will continue to get further away from each other
b. the universe will continue to rotate; therefore galaxies will continue to rotate with the universe
c. the universe may expand forever, therefore galaxies will continue to get closer to each other
d. the universe will stop expanding eventually, therefore galaxies will continue to get closer to each other
a. the universe may expand forever, therefore galaxies will continue to get further away from each other
What is the order of the electromagnetic spectrum from left to right?
Radio waves, Microwaves, Infrared, Visible Light, Ultraviolet, X-Ray, Gamma Ray
A scientist discovers a substance that emits electromagnetic waves with a higher frequency than UV rays. Which statement about this new mystery wave must also be true?
They will have a shorter wavelength than UV rays.
If there is a high-mass star running out of energy and the next step is for the star to expand, what stage of the star's life cycle could this be?
supergiant or red giant
The Milky Way consists of various stars. The farthest galaxy we can detect with our telescope is _____ billion light-years away and the closest is _____ light-years away.
a. 10.4; 28,000
b. 12.3, 50,000
c. 13.4; 25,000
d. 15.4; 120,000
c. 13.4; 25,000
What happens to a sun-like star?
red giant, planetary nebula, white dwarf