True or False
true or false: high mass stars can become black holes
true
The layer of the sun where we can see sunspots is called the
photosphere
the light we see with our eyes
visible light
an explosion of a dying giant or super giant star
supernova
What color of star on an HR diagram has the highest temperature?
Blue
True or false: solar flares and sunspots are the same thing.
False
What are two ways HR diagrams help us characterize stars?
By surface temperature and brightness/luminosity
A device used to observe spectral lines
Spectroscope
first stage of a stars life
protostar
On an HR diagram, the brightest stars are located at the ____
top
True or False: Sunspots stay in one place permanently.
A graph containing the brightness and temperature of a star
H-R diagram
the colors of a spectrum
red, yellow, orange, green, blue, purple
how long a star lives depends on its...
- temperature/brightness
- mass/size
The main force acting on a nebula is:
Gravity
True or false: solar flares can affect the Sun and Earth's magnetosphere
True
90% of stars are classified as _____ _____ stars
What are the axes on an HR diagram?
x = surface temperature (k)
y = brightness/luminosity
true or false: the heaviest (most massed) stars become black holes
true
What drives weather on the Sun?
convection heating
True or False: Stars on the LEFT side (blue stars) of an HR diagram are the highest in temperature
True
What are the two most abundant elements in the Universe and according to what theory, why?
H, He - The Big Bang Theory
According to our graphing solar flares activity, how often do solar flare cycles occur? (How many years does it take for the pattern to repeat itself)
~10-11 years
the blue white hot core of a leftover star
Stars are made mostly of which two elements?
Hydrogen and helium