The distance a ray of light would travel in one year.
What is a light year.
100
Eplain why as you observe the night sky over time, stars appear to move westward across the night sky.
What is earth rotates toward the east so that objects in the sky appear to move in the opposite direction (to the west)
100
All stars begin as this.
What is a nebula?
200
This is why the positions of some of the constellations appear to change throughout the year.
What is the Earth revolves around the sun?
200
The Sun produces energy by fusing hydrogen atoms into these atoms at the core.
What is helium?
200
What color describes the hottest stars
What is BLUE OR VIOLET
200
A group of stars, gas, and dust held together by gravity is called this.
What is a galaxy?
200
Stars are classified according to....
What is luminosity or color or temperature.
300
This is measure of the amount of light given off by a star.
What is absolute magnitude?
300
When the hydrogen in a star is depleted the star.....
Dies or does not produce light
300
This is a region so dense that nothing, including light, can escape its gravity field.
What is a black hole?
300
If two stars have the same absolute magnitude, but one of the stars is farther from Earth that the other one, which star would appear brighter in the night sky?
What is the closer star would appear brighter?
300
True or False. A white dwarf is part of the formation of a star.
What is false. It is apart of the final stages of a star
400
This is the measure of the amount of light received on Earth from a star.
What is apparent magnitude?
400
How or what holds a star together?
What is gravity.
400
This is the color of the coolest star.
red
400
Absolute magnitude is....
What is how bright the star would appear if all stars were at a standard, uniform distance from Earth.
400
True or False. Large red stars are known as giants.
What is true!
500
Stars twinkle in the night sky. True or False
False
500
Stars produce this kind of energy
What is heat or light or nuclear energy.
500
Our sun is considered average in temperature why?
It is white/yellow in color which corresponds to an average temperature in the main sequence.
500
Plotting the surface temperature of stars against their luminosity or the total amount of energy they give off each second, reveals a consistent pattern. This pattern is represented on what diagram?