1. Learning Goals:
4. Complex Knowledge: demonstrations of learning that go aboveand above and beyond what was explicitly taught. 3. Knowledge: meeting the learning goals and expectations. 2. Foundational knowledge: simpler procedures, isolated details, vocabulary. 1. Limited knowledge: know very little details but working toward a higher level.
How do stars differ from moons and planets, and from one another?
How does the classification of stars help us understand how they evolve over their lifetimes?
What are the different types of stars?
What happens when different types of stars die?
Why is it important for us to understand stars?

2. Bell Work
What type of star did you research yesterday? What type of star did the person next to you research? What is one way those two types of stars are different? One way they are similar?

3. Star sizes and colors
Are stars all the same size and color?

4. Size comparison 1” 830”* 1.7” 2.7” 37” 0.03” 14”
Measure string the length of the diameter.
Fold the string in half .
Hold the middle and use your pencil to draw a scale diagram of these stars!
Label the stars, then guess their color
Star
Diameter
(sun =1)
Color
Sun 1”
Yellow
Betelgeuse (Orion)
830”*
Red
Sirius
1.7”
Vega (lyra)
2.7”
White
Polaris (North Star)
37”
Blue
Proxima Centauri (closest)
0.03”
Dubhe (ursa major)
14”
orange
Please get the string neatly back on the cardboard!! Thanks

5. Spectral class
Radius
(sun=1)
Mass O
12-25
20-120 B
4-12
4-20 A
1.5-4
2-4 F
1.05-2 G K M

6. Types of Stars by Size, Color and Life Cycle
Video is on

8. Underneath your chart:
Explain at least two trends that you notice as you move from O-class stars to M-class stars

9. Your Assignment…IS DUE TOMORROW!!!
“If you wish to make an apple pie from scratch you must first invent the universe.“
-Carl Sagan
Paragraph and Diagram
Pick an element that can be found in apple pie and trace its evolutionary history to a star or the universe.
Address the constant recycling of elements here on earth, as well as the formation of elements in the cores of active stars and supernovae.
Describe the way in which these elements were dispersed from the star through space and ultimately to the Earth.
create a diagram that illustrates the meaning of this statement. Diagram should also include whatever you need to better explain the scientific concept.
There will be test questions regarding this assignment