LT 5 HR Diagram Synchronous

HR Diagram Synchronous

LT 5 analye HR diagram to classify stars

Learning Objective

• We will explore characteristics of stars, and classify them based on luminosity, temperature (color), spectral class, and size by analyzing the HR Diagram. 

  
  

  
  

• I will analyze the HR Diagram and compare stars based on their position to determine their luminosity and temperature.

What is a star

• Luminous (BRIGHT) ball of gas held together by gravity

• Made of hydrogen and helium

• Some are extremely hot while others are just hot

• Some stars are very bright while others are dim (not bright)

Multiple Select

A star is made of...

(select all that apply)

• HYDROGEN

• HONEY

• H2O

• HELIUM

Multiple Choice

Which of the following words would describe a star that is BRIGHT

• dim

• dull

• hot

• luminous

Multiple Choice

Which word describes a star that is NOT very bright?

• dull/dim

• hot

• luminous

• giant

Multiple Choice

The Hertzsprung-Russell Diagram is a tool that shows

• the composition of the stars

• all of the planets in our solar system

• relationships & differences between stars

• only 1 group of stars

Multiple Select

The position of a star on the HR Diagram can tell you

• surface temperature

• absolute magnitude (luminosity)

• distance from earth

• the galaxy that the star is in

Multiple Choice

Every star on the HR Diagram is compared to our star the Sun

• true

• false

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

What is found on the y axis of an H-R diagram?

• Luminosity

  (or brightness)

• Temperature

• Star Size

• Distance

Multiple Choice

As you move from the bottom to the top of the HR diagram

• Temperature increases

• Luminosity increases

• luminosity decreases

• temperature decreases

Multiple Choice

The size of the star is related to its luminosity

• false

• true

Multiple Choice

The larger the star the greater the luminosity

• false

• true

Multiple Choice

Which star is brighter than the sun?

• Sirius B

• Procyon B

• Van Maanan's Star

• Aldebaran

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

Blue stars are the _____________.

• hottest
• coolest
• smallest

Multiple Choice

Red stars are the _____________.

• hottest
• coolest
• biggest
• brightest

Multiple Choice

What is found on the x axis of an H-R diagram?

• Luminosity

  (or brightness)

• Temperature

• Star Size

• Distance

Multiple Choice

Which star has the lowest temperature?

• A
• B
• C
• D

Multiple Choice

Which star is the coldest?

• Yellow Star
• Red Star
• Orange Star
• Blue Star

Multiple Choice

Which star is the hottest?

• Yellow Star

• Red Star

• Orange Star

• Blue Star

Multiple Select

The main groups of stars are (select all that apply)

• giants

• main sequence stars

• red giants

• white dwarfs

Multiple Choice

Compared to the rest of the stars, our sun is considered...

• red Extremely Large and Cold

• white Small with a medium temperature

• yellow Medium size with medium temperature

Multiple Choice

Which category is our Sun located in?

• White Dwarfs
• Supergiants
• Main Sequence
• Giants

Multiple Choice

Which spectral class does our star, the sun, belong to?

• M
• K
• G
• F

Multiple Choice

As a whole, Giants are considered hotter than White Dwarfs.

• True
• False

Multiple Choice

True or False: White dwarfs are warmer and dimmer than giants.

• True

• False

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 hotter than Deneb

• Procyon

• Sun

• Regel

• Banard's Star

Multiple Choice

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

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