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Components of the Universe ReviewREGULAR
List the stages in the life cycle of an Average Star:
Nebula – area of dust and gas where stars are formed
Main Sequence Star
Red Giant
White Dwarf
Our Sun is currently in which stage?
Nebula – area of dust and gas where stars are formed
Main Sequence Star Red Giant
White Dwarf
What type of star is our Sun currently (size and color)?
Our Sun is average compared to other stars.
It is a medium, yellow main sequence star.
List the stages in the life cycle of a Massive Star:
Nebula
Main Sequence Star
Red Supergiant
Supernova
Black hole and/or Neutron Star
What will be the last two phases of our Sun’s life?
Red Giant, then White Dwarf
List three types of Galaxies:
What force keeps the stars together in a galaxy?
GRAVITY!!!
What type of galaxy is the Milky Way Galaxy?
Our Milky Way galaxy is a spiral galaxy.
We do not have actual pictures of our entire galaxy because we do not have the technology to send something that far out to take a picture. Not our actual Galaxy
Where is our solar system located in the Milky Way Galaxy?
We are located in one of the spiral arms of the galaxy about 25,000 light years from the center and 25,000 light years from the edge.
Wavelength
Define Wavelength:
The distance from crest to crest or trough to trough in a wave
What is the Longest Wavelength?
Radio Waves (longest length, lowest energy)
What is the Shortest Wavelength?
Gamma Rays (shortest length, highest energy)
How is wavelength related to energy?
As wavelength decreases (gets smaller), the energy increases.
Shortest wavelength, highest energy
Longest wavelength, lowest energy
What do light years measure?
If a person orbiting a star 20 light years away were observing Earth right now and you were outside on a clear day, would they be able to see you? Why or Why not?
If the person is 20 light years away, then the light they are viewing left Earth 20 years ago. The would not be able to see you because you would not have been born yet.
Evidence of Big Bang theory:
Red Shift
Galaxies are moving away from each other really fast, causing the wavelength of visible light to stretch out. Stretching the wavelength makes them appear more red.
Background Radiation –
Scientists have found radiation, which is from the initial explosion of the “Big Bang”
Background Heat -
The temperature of the Universe is above absolute zero, meaning the tremendous amount of heat released during the Big Bang is still cooling off
What is the relationship between Luminosity and Temperature shown on the diagram?
As temperature increases, so does luminosity.
Complete the chart for the Electromagnetic Spectrum Wavelengths
Type of Wavelength Use or Effect Size
Radio Broadcasting 103 Longest
Microwave Satellite communicationCooking 10-2
Infrared Detects Heat energy 10-5
Visible Light Visible to human eye 10-6
Ultraviolet Causes Sunburn 10-8
X-ray Medical images 10-10
Gamma Ray Cancer treatment 10-12 Shortest
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