1) List the five chief types of radiation in order of increasing (note the word,  increasing) wavelength.

4) Using the material presented in lecture video 9, explain briefly why the sky appears blue during the daytime and why clouds appears white or gray during the daytime.

5) In one grammar-checked and proofread paragraph, outline the structure of the Sun.  (Include items such as its different layers, its composition, its temperature, its chief features)  Use the internet to find out how many Earth masses (not diameters) it would take to equal the mass of the Sun.  (Neglect the fact that they are made largely of different elements.)

6) With regard to the Sun, what is hydrostatic equilibrium?  What important question did it answer?

7) It was once thought that the source of the Sun’s radiation was a big fire deep inside the Sun.  Is there a big “fire” in the Sun?

8) What will happen to the Sun in about five billion years? What will probably happen to the Earth at that time?  What is the Sun’s fate?