Light
The top of a wave is called a ________.
Crest
List the wavelengths of the EMS in order of INCREASING length
gamma, x-ray, ultraviolet (UV), visible, infrared, microwave, radiowave
This layer is the most dense layer
Core
All stars start from here
stellar nebula
This type of galaxy is characterized by not having a definite shape
Irregular
crest to crest or trough to trough
This wavelength is the light we are able to see:
5 BONUS points if you can tell me the wavelength
visible
BONUS: 380-700 nanometers
What temperature must the core reach for nuclear fusion to occur?
15 million degrees K
What two values are compared in a H-R diagram?
temperature and luminosity
Give 2 properties of old galaxies
-Dim
-Reddish in color
-Little interstellar matter
The number of waves that pass a point in space in 1 second is known as _________.
frequency
This wavelength can be sensed as heat
infrared
Convection currents--warm gases rise and cool gases sink to create currents
This results after a star has gone supernova and nothing can escape it's gravitational pull.
Black hole
Give 2 of the 3 main pieces of evidence used to support Big Bang.
-Abundance of light elements (hydrogen and helium)
-Cosmic Microwave Background Radiation (CMR)
What is the relationship between frequency and wavelength?
Inverse; The longer the wavelength, the lower the frequency.
This wave type has a frequency higher than X-rays
Gamma
These are the darker areas on the photosphere that are cooler than the surrounding gas
Sunspots
List the life cycle of an average star
stellar nebula---->average star---->red giant----> white dwarf
How would you classify a spiral galaxy with open arms and very little nucleus/bulge?
Sc
What is the speed of light?
3.00 x 108 m/s
This wave type is responsible for sunburn--be SPECIFIC!
UV-B
This layer is known as the sphere of color
What forces must be balanced in order for a star to remain a stable size?
Gravity (inward force) and nuclear fusion (outward force)
How does redshift support Big Bang?
If things are currently expanding and moving away, in the past (even last year) they were closer. If we continue to move galaxies closer over the age of the universe, we are back to an infinitesimally small point