Transcript Stars

TOC
pg 1-14
Unit Plan: Relationship Between the Sun, Earth, and Moon pg 1
Moon Vocab Quiz pg 2
Moon C-Notes pg 3
Moon 2 C-Notes pg 4
Moon Spinner pg 5
Moon Vocab Quiz pg 6
Moon-Phase Prediction Sheet HW pg 7
Post-It pg 8
Seasons C-Notes pg 9
Tides and Leap Year C-Notes pg 10
Unit plan: The Universe pg 11
Light Year and Universe C-Notes pg 12
HR Diagram and Stars C-Notes pg 13
HR Diagram Practice pg 14
I CAN
interpret and
classify stars using
the HR Diagram
H-R Diagram/Stars
4 Characteristics of Stars
 Size
 Color
 Temperature
 Brightness
Size
 Stars
range greatly in size from large
supergiants to very small dwarfs.
 Our star, the Sun, is considered to be
average in comparison to the size of
other stars.
Color and Temperature
Color reveals clues about the temperature
of a star.
 Stars have different colors ranging from
reds, oranges, and yellows, to blues and
whites.

Color and Temperature of Stars
Color
Temperature (oC)
Red
<3,500
Orange
3,500 - 5,000
Yellow
5,000 - 6,000
Yellow-white
6,000 - 7,500
Blue-white
7,500 - 30,000
Blue
>30,000
Brightness
The brightness of a star depends on its
size, temperature, and distance from the
observer.
 The hotter the star, the brighter its color.
 Blue and white stars are the brightest and
hottest stars.
 Red stars are the dimmest and coolest.

Magnitude


Another name for brightness is
magnitude.
Two types of magnitude
1.
2.
Apparent magnitude
 Depends mainly upon distance
Absolute magnitude
 Depends upon a stars size and
temperature
H-R Diagram
http://sunshine.chpc.utah.edu/labs/star_life/h
r_interactive.html