1. The Hertzsprung - Russell Diagram shows the relationship between a star's absolute
and surface
2. Brightness increases as you go higher or lower on the diagram?_
3. In which direction, does temperature increase on the graph?
4. What colors are represented by the Spectral Class letters: 0 =
,A=
B =
,K=
,M=
,,Z=
5. What is the color of the hottest star?
What is the color of the coolest star?
6. Type of stars: W =
V =
7. What well known star is represented by the star labeled Y?
8. What type of star is Y?
What is temperature & color of star Y?
9. Which type of star is the letter U?
What is its color?
10. What is the temperature of star T?
What is its brightness?
11. Which star is brighter T or U?
Which star has cooler temperatures, T or U?
12. Which star is brighter X or Z?
Which star is hotter X or Z?
13. Which star is smaller X or Z?
Which star is larger V or X?
14. Does temperature increase or decrease in the Main - Sequence stars as they get brighter?
15. Why is the Sun brighter than the White Dwarfs even though the White Dwarfs are hotter? THIS QUESTION IS WORTH 45 points

True or false: the revolution of the earth creates day and night as it rotates around the sun

Use the frequency histogram to complete the following parts. ​(a) identify the class with the​ greatest, and the class with the​ least, relative frequency. ​(b) estimate the greatest and least relative frequencies. ​(c) describe any patterns with the data. female fibula lengths 30.5 31.5 32.5 33.5 34.5 35.5 36.5 37.5 38.5 39.5 0 0.05 0.1 0.15 0.2 0.25 length (in centimeters) relative frequency a histogram titled "female fibula lengths" has a horizontal axis labeled "length in centimeters" from 30.5 to 39.5 in increments of 1 and a vertical axis labeled "relative frequency" from 0 to 0.25 in increments of 0.05. the histogram contains vertical bars of width 1, where one vertical bar is centered over each of the horizontal axis tick marks. the approximate heights of the vertical bars are listed as follows, where the label is listed first and the approximate height is listed second: 30.5, 0.02; 31.5, 0.04; 32.5, 0.05; 33.5, 0.13; 34.5, 0.22; 35.5, 0.25; 36.5, 0.13; 37.5, 0.06; 38.5, 0.09; 39.5, 0.01. ​(a) the class with the greatest relative frequency is nothing to nothing centimeters. ​(type integers or decimals. do not round. use ascending​ order.)

What is created when solids,liquids,an gases mix with one another