Video Review
Key Concept Summary
TA Summary
Vocabulary
The space between stars.
Beginning phase of a star when gravity begins to condense the surrounding matter.
Process that provides a star's energy.
Remnant of a star composed entirely of neutrons because gravity pulled the electrons into the protons.
Neutron star that emits precisely-timed bursts of radio waves and high-energy x-rays.
Gas that glows from being heated by a nearby hot star.
Glowing bubbles of gaseous material that expand out from a small star into space.
Cool layer that the star's light comes from.
The final stage of a very massive star that no longer emits light and pinches off the space-time region.
A collection of gas that is too cold to emit visible light. The gas does emit low-energy radio waves.
The small hot core that remains after a small star forms a planetary nebula. The star is about the size of Earth at this stage.
Chart that plots stars' luminosity and temperature.
In this stage, the star expands to about 50 times its normal size.
The name of a white dwarf after it cools and no longer emits energy.
When a star collapses and rebounds, creating a massive shock wave that destroys the star.
True/False
The interstellar medium is a true vacuum.
In stars, the pressure generated from fusion balances the inward force of gravity.
For a protostar to form, the nebula needs to be hot enough to glow brightly.
As the temperature of a star increases the pressure within the star also increases.
The photons we see from the sun are produced in the center where fusion occurs.
Big stars live for a shorter time than small stars.
Analysis
A newly formed star is composed mostly of
Which of the following best represents the end state of a star 1/2 the size of our sun?
Which of the following is most likely to form a black hole?
Elements heavier than iron are created in which stage of a star’s life?
What force causes the particles in a nebula to collapse into a protostar?
In a main sequence star what force balances the gravitational force?
What stage are most of the stars we see in the night sky?
Our sun's energy currently comes from
A neutron star is the final stage of what size star?
The stage where fusion stops in a small star.
A star that is emitting as much radiation as an entire galaxy that can be seen at great distances.
Which of the following represents the proper sequence for the history of a star 5 times more massive than the sun?
What type of star is the sun?
Protostars emit infrared light. Where does the energy to produce these photons come from?
If you look up information about two different main sequence stars, one red and one blue, on the HR diagram, what will you see?
The gravitational force causes a protostar to collapse. Which of the following tends to offset and slow the collapse? The question refers to a time in the evolution of a protostar before it moves to the next stage and becomes a star.
Most stars spend the greater part of their active life as a
The sun will eventually become a