Download Stellar Evolution and the HR Diagram Study Guide

Stellar Evolution and the H-R Diagram Study Guide
Name _______________________
Earth Science
1.
Most stars are composed mainly of hydrogen and helium.
2.
The color of the hottest stars is blue .
3.
Any hot, bright sphere of gas like the sun is called a star
4.
The brightness of a star as we view it from Earth is the star’s apparent magnitude.
5.
The late phase(stage) for a small mass star is a white dwarf star
6.
Hydrogen is the “fuel” of the sun..
7.
On an H-R Diagram, stars are classified by their temperature and absolute magnitude .
8.
What is the next stage of the sun?
9.
Two stars that are in close orbit around each other are called eclipsing binary stars.
10.
White dwarf stars are very faint, Earth-sized stars.
11.
A black hole is a star in which matter is continually condensed and no light escapes.
12.
The absolute magnitude is a measurement that allows scientists to compare the true brightness of stars.
13.
A star that changes brightness over regular periods of time is called a variable star.
14.
A Cepheid variable is a type of variable star that can be used to measure distances in space.
15.
A stellar nebula is composed of dust and gas.
16.
The initial mass will of a star will determine the evolutionary course a star will take.
17.
The sun is a main sequence star.
18.
The explosion of a massive star at the end of its life is called a supernova .
19.
The process that occurs when atoms combine to form a new element and release energy is called
fusion .
20.
The first stage in the life cycle of a star is called a stellar nebula .
21.
Rapidly spinning neutron stars are called pulsars .
Red Giant
22.
Hydrogen is the main component of most stars.
23.
The sun will continue to fuse hydrogen into helium for another 5 billion years.
24.
Which star will appear brighter in the night sky, a star with an apparent magnitude of 0 or a star with an
apparent magnitude of +1? Star with apparent magnitude of 0
Use the diagram below to answer the following questions
25.
Name the two brightest stars.
Rigel and Betelgeuse
26.
Which star is hotter, Vega or Capella?
Vega
27.
Which group of stars is the dimmest?
White dwarfs
28.
What group of stars does Arcturus belong to?
Red Giants