Write It! Students should be encouraged to do the Research and Explore station before attempting this one.

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1 Kesler Science Station Lab H-R Diagram Teacher Directions Explore It! I will spend much of my time at this station making sure that the students are doing the Celebrity H-R diagram correctly and not wasting time. I would definitely consider laminating the pieces and charts at this station. They will get a lot of touches throughout the day. Hotness is subjective, but I will adjust star power if necessary. Organize It! The cards for this activity are attached near the end of this file. Print several sets and then just put them in the basket for kids to pull from. This is also a good one for later in the week to demonstrate mastery too! Students should be encouraged to do the Research and Explore station before attempting this one. Illustrate It! You will need to set out map colors and markers at this station. Read It! Print several different copies (I use 6) of the reading passage so that multiple students can read at different paces Watch It! The video is on YouTube and my Google drive. Use YouTube unless your school is blocked. The original link is Note that both URL s are case-sensitive. Write It! Students should be encouraged to do the Research and Explore station before attempting this one. Research It! The goo.gl link on the task card is case-sensitive. The original link is Assess It! Students should be encouraged to do the Research and Explore station before attempting this one. If I grade anything I usually take a close look at the answers from this station.

2 Write It! Station Directions It is recommended that you have completed at least two of the following stations before working at this station. -Read It! -Explore It! -Watch It! -Research It! Answer each of the task card questions on the lab sheet in complete sentences.

3 In your own words describe what the H-R diagram is used for. Pretend a student from a lower grade asked you to explain to them how to read the H-R diagram. Write a brief summary. What is unique about the temperature on the H-R diagram compared to most of the other graphs you have looked at in the past?

4 Assess It! Station Directions It is recommended that you have completed at least two of the following stations before working at this station. -Read It! -Explore It! -Watch It! -Research It! Each member will answer the questions from the task cards on the lab sheet in the Assess It! section.

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6 What do you notice about the temperature on the x-axis of the H-R diagram? A. It increases from left to right B. It increases from right to left C. It increases from bottom to top D. It increases from top to bottom Choose the best description for the Sun compared to all other stars on the H-R diagram? A. The Sun is brighter but cooler than most stars B. The Sun is hotter and brighter than most stars C. The Sun is average temperature but brighter than most stars. D. The Sun is an average temperature and average brightness. Which star is hotter and brighter than our Sun? Which statement is true about Antares and Procyon B? A. Spica B. Barnard s Star C. Betelgeuse. D. Sirius B A. Antares is brighter and hotter than Procyon B B. Antares is dimmer and hotter than Procyon B C. Antares is brighter and cooler than Procyon B D. Antares is dimmer and cooler than Procyon B

7 Read It! Station Directions Each member of the group will read the passage and answer the questions from the task cards on the lab sheet in the Read It! section. It is important to remember that the answers will come directly from the reading passage.

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9 The Hertzsprung-Russell Diagram Are all stars the same? Not at all! Some stars are just beginning to form in nebulae while others are enjoying middle age along the main sequence, and some have even begun to die. The life cycle of a star can be compared to the life cycle of humans. The Hertzsprung-Russell Diagram is a tool that shows relationships and differences between stars. It is something of a "family portrait." It shows stars of different ages and in different stages, all at the same time. It is NOT a map of where stars are located. In the Hertzsprung-Russell (HR) Diagram, each star is represented by a dot. There are lots of stars out there, so there are lots of dots. The position of each dot on the diagram tells us two things about each star: its luminosity (absolute magnitude or brightness) and its temperature. Most of the stars lie within a region called the main sequence. It looks kind of like a curved line sloping from the upper-left to the lower-right of the HR diagram. This is where we can find out Sun. Our Sun is an average temperature and an average brightness compared to other stars on the H-R diagram. How do you read the HR diagram? Well, let s look at some basic regions on it. A star in the upper left corner of the diagram would be hot and bright. A star in the upper right corner of the diagram would be cool and bright. The Sun rests approximately in the middle of the diagram, and it is the star which we use for comparison. A star in the lower left corner of the diagram would be hot and dim. A star in the lower right corner of the diagram would be cold and dim.

10 What two things can the H-R diagram tell us about stars? A. distance and temperature B. distance and brightness C. temperature and distance D. temperature and brightness Which of the following cannot be determined by an H-R Diagram? A. Brightness (Luminosity) B. Temperature C. Color D. Location A. Main sequence B. Supergiants C. White Dwarfs D. Red Giants Where can most stars be found in the H-R diagram? A star located in the upper right corner of the diagram would be? A. Bright and Hot B. Bright and Cool C. Dim and Hot D. Dim and Cool

11 Watch It! Station Directions Each member of the group will go to the website listed on task card #1 Complete the task cards in order. Every student will answer the questions from the task cards on the lab sheet in the Watch It! section of the lab sheet.

12 Flash drive: The Hertzsprung- Russell Diagram 1. Answer questions from cards #2-4 on your lab sheet. What is interesting or different about how temperature is lined up along the x-axis? Describe the temperature and brightness for supergiants and white dwarfs. Near the end of the video he talks about what the H-R diagram can tell us about stars. List the 4 things he mentions.

13 Research It! Station Directions Each member of the group will go to the website listed on task card #1 Complete the task cards in order. Every student will answer the questions from the task cards on the lab sheet in the Research It! section.

14 1. Go to aspire.cosmic-ray.org/ Labs/StarLife/support/ HR_init.swf Categorize each of the stars according to brightness and temperature and click Check. 1. List the temperature and brightness for these 3 stars. a. Betelgeuse b. our Sun c. Sirius B 1. Compare Vega to Alpha Centauri B.

15 Explore It! Station Directions One member of the group will read the task cards in order. The group will be responsible for completing each of the tasks that are being read. Each member of the group will then write their conclusions down on the lab sheet in the Explore It! section.

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17 Everyone Knows Them Celebrity H-R Diagram Star Power Hardly Anyone Knows Them Super Hot! Hotness Bleh!

18 Celebrity H-R Diagram Characters Michael Jackson Beyoncé Gabriel Iglesias Snaggle Tooth Taylor Swift Jason Aldean Drake Adriana Lima Seth Rogen Oprah Winfrey I would cut these out and laminate them. They will see a lot of wear and tear during this lab.

19 Use the celebrity pieces and rate them based on hotness and star power. Place each piece on the celebrity H-R diagram. In order for the celebrity to have a high star power EVERYONE in the school needs to know who that person is. Now take a look at the real H-R diagram. Stars are classified much in the same way as you classified the celebrities. Stars are classified by temperature and brightness (absolute magnitude/luminosity). Notice that the temperature is increasing from right to left on the x- axis. Temperature A. The Sun B. Zeta Eridani C. Sirius B D. Antares E. Barnard s Star Classify the following stars based on brightness and temperature. Use the words: hot, cool, bright, dim, and average

20 Illustrate It! Station Directions Each member of the group will draw a quick sketch on the lab sheet the shows they understand the concept that is being taught. Use the colored pencils and markers that are provided. The directions for the sketch are provided on the task card at the table.

21 Illustrate It! Station Directions Complete the diagram on your answer document. 1. Label the title, and both the x-axis and y- axis. 2. Label the Supergiants, White dwarfs, Main sequence and Red Giants. 3. Label the following temperature and brightness combinations on the correct area of your chart: hot/bright, hot/dim, cool/bright, cool/dim, average temp/average brightness

22 Organize It! Station Directions It is recommended that you have completed at least two of the following stations before working at this station. -Read It! -Explore It! -Watch It! -Research It! Every student will answer the questions from the task cards on the lab sheet in the Organize It! Section. Please mix up the cards again before the next group arrives at this station.

23 Use the blank H-R diagram and place the cards in the correct spot. Have the teacher check your chart to ensure it is correct. They will sign your lab sheet in the Organize It area.

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25 Hertzsprung-Russell Diagram Hot, Bright Temperature Luminosity (Brightness or Absolute Magnitude) Hot, Dim Supergiants White Dwarfs Cool, Bright Main Sequence Cool, Dim Red Giants Average, Average

26 H-R Diagram Explore It! Name Task Card #4: A. The Sun B. Zeta Eridani C. Sirius B D. Antares E. Barnard s Star Write It! Task Card #1: Task Card #2: Task Card #3:

27 H-R Diagram Name Illustrate It! Assess It! Read It! #1 #3 #2 #4 #1 #3 #2 #4 Research It! Task Card #2: A. Sun B. Betelgeuse C. Sirius B Task Card #3: Organize It!

28 H-R Diagram Name Watch It! Task Card #2: Task Card #3: Task Card #4: