HR Diagram

Thursday

BELL RINGER
1

Lesson Hook- Think-Pair-Share
2

Think:
Take a moment to observe and reflect on what you see.
1.What do you think this diagram tells us about
stars and their properties?

Pair:
Pair up with a partner and share your answers.
Share:
Class discussion

Content Objective

Language Objective

3

8.9A- Describe the life cycle of stars and compare and classify stars using the Hertzsprung-Russell diagram
(HR Diagram)

Students will participate in discussions and group sharing activities using content-based terms and
common abstract vocabulary.
Students will participate in shared writing activities using the English language

I can interpret the HR
Diagram.

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Vocabulary
3

1.Hertzsprung-Russell Diagram (HR Diagram)

2.Temperature

3.Brightness

4.Luminosity

5.Quadrants

6.Spectral Class

3B

Friday

BELL RINGER
1

Lesson Hook- Partner Work
2

Draw this blank HR Diagram and label

Content Objective

Language Objective

3

8.9A- Describe the life cycle of stars and compare and classify stars using the Hertzsprung-Russell diagram
(HR Diagram)

Students will participate in discussions and group sharing activities using content-based terms and
common abstract vocabulary.
Students will participate in shared writing activities using the English language

I can describe how the
stars are classified on

the HR Diagram.

I can interpret the HR

Diagram.

3

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Vocabulary
3

1.Main Sequence

2.Giants

3.Supergiants

4.White Dwarfs

3B

Multiple Choice

Which star stage does our Sun belong to?

• Supergiant

• Giant

• Main Sequence

• White Dwarf

Multiple Choice

In the diagram given, what happens as we move to the left?

• Stars Get Larger
• Stars get Colder
• Stars get hotter

Multiple Choice

Red stars are the _____________.

• hottest
• coolest
• biggest

Multiple Choice

Blue stars are the _____________.

• hottest
• coolest
• smallest

Multiple Choice

What determines the color of a star? 

• It's size
• It's temperature
• It's composition
• They are all the same color 

Multiple Choice

As you move from the bottom to the top of the H R diagram the __________ changes.

• Temperature
• Luminosity or Brightness

Multiple Choice

Ninety percent of all stars are ______ .

• white dwarfs

• supergiants

• red giants

• main sequence stars

Multiple Choice

The ______ of a star determines its life cycle.

• gravity

• mass

• age

• color

Reorder

Put the stars in the correct order from coolest to hottest.

• Red

• Orange

• Yellow

• White

• Blue

1

2

3

4

5

• 1
• 2
• 3
• 4
• 5

Multiple Choice

What is the Hertzsprung-Russel Diagram?

• A map which tells the approximate location of stars in the Milky Way galaxy and their distance from Earth.

• A table that alphabetically lists stars by name and includes dates of when the star was first charted.

• A chart which organizes stars into categories based on the amount of Hydrogen they burn.

• A graph used to classify stars according to their luminosity, color, temperature, and stage.

Multiple Choice

Which star is considered a supergiant?

• Sirius B

• Sun

• Betelgeuse

• Van Maanan's Star

Multiple Choice

Which star is considered a giant star?

• Mira

• Zeta Arindani

• Barnard's Star

• Betelgeuse

Multiple Choice

Which star is considered a main sequence star?

• Vega

• Betelgeuse

• Pollux

• Van Maanan's Star

Multiple Choice

Which star is brighter than Alpha Centauri B, but dimmer than the sun?

• Pollux

• Spica

• Tau Ceti

• Mira

Multiple Choice

Which star is brighter than the sun?

• Sirius B

• Procyon B

• Van Maanan's Star

• Aldebaran

Multiple Choice

Which star is hotter than Deneb

• Procyon

• Sun

• Regel

• Banard's Star

Multiple Choice

Using the HR diagram, choose the color of Zeta Eridani

• blue

• white

• yellow

• red

Lesson Closure

In complete

sentences,explain how to
read an H-R diagram to
someone who is new to

learning about

stars.

5