Life Cycle of Stars
Classification of Stars
Galaxies
The Universe
Earth
100
This cloud in space is the birthplace for all stars.
What is a nebula?
100
A star's color gives an indication of this.
What is it's temperature?
100
These kinds of galaxies do not have a regular shape.
What is an irregular galaxy?
100
The universe contains many of these clusters of billions of stars, gas, and dust.
What is a galaxy?
100
The process by which earth composition became layered from more dense material near the center to less dense near the surface.
What is density stratification?
200
This process occurs in the core of stars.
What is nuclear fusion?
200
On the Hertzsprung Russell diagram, 90% of all stars fall into this area.
What is the Main Sequence?
200
Our galaxy is roughly 100,000 of these across.
What is a light year?
200
This theory states that the universe began with a massive explosion.
What is the Big Bang Theory?
200
Carbon dioxide, Nitrogen, Water vapor, with traces of ammonia and methane made up this.
What is the composition of Earth's early atmosphere?
300
This is the name for an early star.
What is a protostar?
300
This is the brightness of stars if they were a standard distance from Earth.
What is absolute magnitude?
300
This is believed to be at the center of our galaxy.
What is s black hole?
300
The universe is doing this and as a result galaxies are spreading further and further apart.
What is expanding?
300
This unit of measurement is equal to 93 million miles.
What is an astronomical unit (AU)
400
Star death occurs when a star runs out of this fuel.
What is hydrogen?
400
When an object that emits light is moving away from the observer and the color of the object appear more red over time.
What is redshift?
400
A diverse galaxy with both old and young stars, with a high rate of star formation.
What is a spiral galaxy?
400
About a billion years after the big bang occurred, matter started forming these.
What is the time it took for the first galaxies to form?
400
A substance with these properties: Retains heat, moderates temperature, can dissolve many chemicals, and suspends nutrients
What is water?
500
This is gas blown off by a dying star.
What is a planetary nebula?
500
These kinds of stars are found below the main sequence on the H-R diagram.
What are white dwarfs?
500
This type of galaxy contains mainly older stars.
What is an elliptical galaxy?
500
The general temperature direction the universe is heading towards ever since the big bang.
What is cooling?
500
After a large planetary body hit earth, this was formed.
What is the moon?
M
e
n
u