Download Name: ____________________________ Date: _____________ Per. _________ Stars Study Guide (Ch. 21)

Name: ____________________________ Date: _____________ Per. _________
Stars Study Guide (Ch. 21)
1. Branches of Earth Science:
Name
Description
The study of planets, stars, and other objects in space.
Lithosphere
The waters of the earth
Atmosphere
2. What are the tools used to study stars:
Tool Used to Study Stars
Telescope
What tool does
helps astronomers determine the composition of stars by
creating a spectrum
3. What is a spectrum?
__________________________________________________________
4. What is a constellation?
_______________________________________________________
Best Known Constellation
Ursa Major (Big Bear)
What is part of it
Little Dipper
5. 4 Ways to Classify Stars:
A.
C.
B.
D.
6. Color & Temperature
Place the colors on the line according to their temperature:
Hottest
Warm
A.
B.
Cool
C.
Coolest
D.
Name: ____________________________ Date: _____________ Per. _________
7. Size
Star Size (Smallest to Largest)
Neutron
How Big
size of Earth
Medium
10-1000 x’s the sun
Super Giant
8. Brightness
Type of Brightness Description
Apparent
Brightness
The actual brightness of a star (How much light the star actually
gives off)
9. Why does the sun appear to be the brightest star in the sky if it is only medium
brightness?
10. What are the 3 factors that affect brightness of a star?
A.
B.
C.
11. Composition (Chemical Make Up)
Composition of Stars
Percentage of Element
73%
Helium
2%
12. Measuring distances to stars
How to Measure
Unit used
____________: the apparent change in the position of a star in the
sky.
Light-year:
Name: ____________________________ Date: _____________ Per. _________
13. What is a graph that shows the relationship between absolute brightness and surface
temperature of a star? __________________
14. What is the main sequence?____________________________________________
15. Why do stars follow two different paths in the Life Cycle of Star? _________________
___________________________________________________________________
16. Which type of star lives longer & why? ______________________________________
___________________________________________________________________
17. Multi Star Systems
Type of System
Description
A star system with 2 stars
Star Cluster
# of Stars
Hundreds, thousands or
millions
A huge collection of stars
bound together by gravity
18. Our Galaxy
Name of our Galaxy
Shape of our galaxy
19. It takes the Rigel four hundred million years to move around the center of the Milky Way
Galaxy. Express this distance in standard notation
20. Know how to read an H-R diagram
21. Know how to read a graph like the practice graphs we went over