Nuclear Fusion
Lifecycle of a Star
H-R Diagram
E-M Spectrum
Our Sun
100
What process releases energy and causes stars to glow?
Nuclear Fusion
100
What characteristic of stars determines their lifecycles?
Mass
100
The coldest stars burn which color?
Red
100
Which type of radiation has the shortest wavelength?
Ultraviolet
100
What do we call cooler dark spots on the surface of the sun?
Sunspots
200
What element is considered the 'fuel' of a star?
Hydrogen
200
When our sun enters it's late stage, what will it become?
A White Dwarf
200
What stage of life is our sun in?
Main Sequence
200
What color light has the longest wavelength?
Red
200
Where does nuclear fusion occur in the sun?
The core
300
What is the duration of the O --> Si stage in a massive star?
6 months
300
If a high mass star does not turn into a black hole after a supernova, what will it become?
A Neutron Star
300
What is the luminosity of Vega?
102 Solar Units
300
What is the relationship between frequency and wavelength?
Indirect
(As frequency increases, wavelength decreases)
300
What do we call the visible surface of the sun?
The Photosphere
400
As a star fuses heavier elements together, what happens to the temperature?
Increases
400
What force causes nebulas to become protostars?
Gravity
400
Which star will have a longer life: Wolf 359 or Bellatrix?
Wolf 359
400
What type of radiation has a frequency of 1012 hz?
Infrared
400
What type of relationship do sunspots have over time?
Cyclic
500
What is the relationship between atomic weight of elements created in fusion and mass of a star?
Direct
As mass of a star increases, atomic weight of elements created during fusion increases.
500
What element is being created through nuclear fusion when a star is in its Main Sequence stage?
Helium
500
How large is Spica?
10 Solar Radii
500
What two elements are present in the mixture shown below?
Lithium & Strontium
500
What causes sunspots?
The magnetic field of the sun --> slow churning of gasses in the photosphere.