DUE WEDNESDAY (4-25-18 Test Day)

1) The light we see from the Sun comes from which layer?  Page Ref: 16.1

2) The temperature of the layer of gas that produces the visible light of the Sun is:   Page Ref: 16.1

3) Why couldn’t you stand on the Sun’s surface? Page Ref: 16.1

4) How many planet Earths could fit inside the Sun?  Page Ref: 16.1

5) The density of the Sun is most similar to which Planet/Moon?  Page Ref: 16.1

7) About what percent of the incoming energy from the Sun’ reaches Earth’s surface?  Page Ref: 16.1

10) From inside out, what is the correct order for the structure of the Sun?  Page Ref: 16.1

11) By what mechanism does solar energy reach the Sun’s photosphere from the layer just underneath it?  Page Ref: 16.2

12) Hydrostatic equilibrium in our Sun is the balance between   Page Ref: 16.2

13) The vibrations of the Sun reveal information about: Page Ref: 16.2

16)  What two energy transport mechanisms, in order from outside the core to the surface, is found in the Sun?   Page Ref: 16.2

18) The pattern of rising hot gas cells all over the photosphere is called:  Page Ref: 16.2

20) When the chromosphere can be seen during a solar eclipse, it appears:  Page Ref: 16.3

21) From where does most of the solar wind flow?  Page Ref: 16.3

22) What is it about the Sun’s corona that astronomers don’t understand?  Page Ref: 16.3

24) The percentage (by mass) of the Sun that is Hydrogen is about:  Page Ref: 16.3

26) The percentage (by mass) of the Sun that is Helium is about:  Page Ref: 16.3

27) A loop of gas following the magnetic field lines between sunspots’ poles is:  Page Ref: 16.4

28) How long does the sunspot cycle last, on average?  Page Ref: 16.4

29) Visible sunspots lie in the:  Page Ref: 16.4

30) As the Sun rotates, an individual sunspot can be tracked across its face.  From eastern to western limb, this takes about:  Page Ref: 16.4

36) The numbers of sunspots and their activity peak about every:  Page Ref: 16.5

38) During a period of high solar activity, the corona:  Page Ref: 16.5

41) Suppose a large flare is detected optically.  How long until radio interference arrives?

Page Ref: 16.5

42) Describe neutrinos.  Page Ref: 16.6

43) The critical temperature the core must reach for a star to shine by fusion is:  Page Ref: 16.6

45) The primary source of the Sun’s energy is:  Page Ref: 16.6

47) What natural barrier tries to prevent two protons from combining?  Page Ref: 16.6

50) The speed of light is 3.00 × 108 m/s.  If 2.00 kg of mass is converted to energy, how much energy will be produced?  Page Ref: 16.6

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