"H-R Diagram" Gizmo

There are 3 stars in the constellation Orion; Betelgeuse (A), Mintaka (B), and Rigel (C). How do the appearances of Stars A, B, and C compare?

• Star C is larger than stars A and B and Star A is a different color then stars B and C.

• Star C is smaller than stars A and B and Star A is the same color as stars B and C.

• Stars A, B and C are the same color and the same size.

What are some ways the stars in the photo could be grouped or classified?

• Stars can be classified by distance and volume

• Stars can be classified by distance and height

• Stars can be classified by color, size and luminosity (brightness)

Tags

NGSS.HS-ESS1-3

Find Betelgeuse in the star collection. Fill out the chart at the right.

What is the temperature of Betelgeuse?

• 20,000 K

• 10,000 K

• 3,400 K

• 1,000 K

Tags

NGSS.HS-ESS1-3

Activity A.

Analyze: What relationship, if any, do you see between a star's color and it's temperature?

• There is a relationship between a star's color and it' Mass/Size

• The color of a star is directly related to its temperature; thus the temperature of a star determines its color.

• There is NO relationship between a star's color and it's temperature.

5. Graph A

What pattern do you see in the graph?

• There is NO pattern that forms on the graph

• The pattern on the graph is:

  The stars are plotted on the bottom of the graph and then they are plotted up to the top of the graph and back down on the bottom of the graph

• The stars that are plotted form a straight line on the graph (moving diagonal)

Tags

NGSS.HS-ESS1-3

5. Graph B

What does the graph show about the relationship of a star's color and temperature?

• There is no relationship of a star's color and temperature.

• Red/Orange stars are the coolest and blue stars are the hottest; As stars grow hotter, their temperature changes from Red/Orange to Blue.

• Red/Orange stars are the hottest and blue stars are the coolest; As stars grow hotter, their temperature changes Blue to Red/Orange

5. Graph C

Click Move ALL and then Sort Stars. Is the relationship still evident?

• Yes

• No

Tags

NGSS.HS-ESS1-3

6 Infer:

Naos is a star in the Argos constellation. It has a very deep Blue color. What do you think is the approximate temperature of Naos?

• Between 3,000 K - 5,000 K ( it is a cool star)

• Between 25,000 K - 50,000 K ( it is a hot star)

7. Apply:

The flame of many stove burners is blue, but the wires of a toaster glow orange. How do you think the temperatures of these two cooking appliances compare?

• The stove burner is much cooler then the toaster

• The stove burner is much hotter than the toaster

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-3

Activity B:

How do the stars' luminosity (brightness) compare with radii?

• In general, the larger a star is, the brighter it is.

• In general, the larger a star is, the dimmer it is.

Tags

NGSS.HS-ESS1-3