Big Bang
Galaxies
Waves
Doppler Effect
Stars
Nuclear Fusion
HR Diagram
Spectra
100
How long ago was the 'Big Bang'?
14 billion years ago
100
What force holds galaxies together?
Gravity
100
Identify #2 in this image:
Wavelength
100
The term for the change in the frequency or pitch of a wave when the source and the observer move relative to each other. (Hint: Think of when an ambulance drives past you)
Doppler Effect
100
What type of star is the sun?
Main sequence
100
What elements are in our sun?
Hydrogen and helium
100
1. If a star is hot, it is what color?
2. If a star is cool, it is what color?
1. Blue
2. Red
100
Scientists determine composition and temperature of stars by analyzing what?
spectra of light from stars
200
The average distance of the Earth from the sun.
Astronomical Unit (AU)
200
Galaxies are composed of what?
Planets, stars, gas, dust
200
Identify #1, #4, and #3 in this image:
#1- Amplitude
#4- Crest
#3- Trough
200
With a lower frequency, what wavelength is seen?
Longer
200
The end of an average size star. No light is given off.
Black dwarf
200
What is happening in a main sequence star's nuclear fusion process?
hydrogen combine to helium and give off energy
200
Answer High/Low:
What brightness and temperature would blue giants have?
Brightness: high
Temperature: high
200
What tool breaks up light into colored lines?
Spectrograph
300
the distance that light travels in one year
Lightyear (LY)
300
Identify the galaxy type:
Spiral
300
On the visible light spectrum, which color has the most energy, the shortest wavelengths, and lowest frequencies?
blue/violet
300
What colors are associated with the following:
1. shorter wavelength/higher frequency
2. longer wavelength/lower frequency
1. Blue
2. Red
300
What stage is a star if it is a shrinking, spinning region in space with a central concentration of matter
Protostar
300
What is released in each step of nuclear fusion?
Energy
300
Answer High/Low:
What brightness and temperature would white dwarfs have?
Brightness: low
Temperature: high
300
If a star's spectra has lots of lines, is it old or young?
Old
400
the parallax shift as seen from Earth helps determine the distance to distant objects - it is 3.26 light years
Parsec
400
Identify the galaxy type:
Barred Spiral
400
In the electromagnetic spectrum, which end has more energy, which has less?
Left side has lower energy, and longer wavelengths, right side has higher energy and shorter wavelengths
400
Which person hears a higher pitch/shorter wavelength?
Person A
400
a massive star whose core has contracted into a very small but incredibly dense ball of neutrons
Neutron Star
400
When nuclear fusion slows, what happens to the star?
Begins to cool and die off
400
What color(s) are main sequence stars?
Blue, White, Yellow, Orange, Red
400
What two elements does every star have?
Hydrogen and helium
500
Of the four (Light Year, AU, Parsec, Meter), place the following in order from largest measurement to smallest.
Parsec -> Light Year -> AU -> Meter
500
Identify the galaxy type:
Elliptical
500
Which color of waves or energy on the EMS is next to infrared (IR) and ultraviolet (UV)?
Red - Infrared
Violet - Ultraviolet
500
This person has applied the Doppler Effect and identified the universe is doing what?
Expanding
500
What an average size star becomes after it's planetary nebula stage. It is cool but does emit light.
White dwarf
500
Put the steps in correct order:
A - H1s collide, fuse with H2s, form He3
B - 2 He3s combine to make Be6, release 2 protons to become He4
C - 2 H1s collide to make H2
C, A, B
500
Where does yellow stars fall on the HR diagram?
In the middle, of both temperature and brightness
500
What is another term for brightness?
Luminosity