Today you will use a webquest to learn more about stars!
Click Stars: Lights in The Sky. Read the paragraph under “Lights in the Sky” and write the answers to the following questions on your paper.
1) – Without stars there would be no _______________.
7) - Do a search on the internet for "brightest stars as seen from Earth" and create a top 5 list on your paper of their names.
Two of the most important characteristics of stars are temperature and absolute magnitude. About 100 years ago, Ejnar Hertzsprung in Denmark and Henry Norris Russell in the United States each made graphs to find out if temperature and luminosity (or brightness) of stars are related. They plotted the temperatures of stars on the x-axis and their brightness on the y-axis. The points formed a pattern.
The graph they made is still used by astronomers. It is called the Hertzsprung-Russell diagram, or H-R diagram. Click on the image of the Hertzsprung-Russell Diagram. As you can see, most of the stars form a diagonal line called the ‘main sequence.’ More than 90% of all stars are main-sequence stars. The sun is among the stars on the main sequence.
8) – As surface temperatures of the main sequence stars increase, what happens to their brightness?
Click on the image that shows the life cycles of two different types of stars: low-mass stars (like our sun) and high-mass stars (huge/giant stars).
12) – Fill out the comparison chart on your worksheet.
Click on the link to learn more about black holes.
13) – Are black holes ACTUALLY holes?
Have some extra time? Play “Black Hole Rescue”! Be sure to read the directions and let your teacher know your high score!
Class Pages > 8th Grade Earth Science--Mrs. Kondela & Mr. Grandt > EARTH SCIENCE: Other Objects in Space >