________ occur(s) because photons we receive from the edge of the solar disk are emitted further from the base of the photosphere than the photons we receive from the center of the solar disk.
a. The Zeeman Effect
b. Sunspots
c. Solar flares
d. Solar prominences
e. Limb darkening
Question 2If an object's orbital velocity is greater than its escape velocity, then the shape of the path is a/an __________________ and the orbit is____________.
a. ellipse, closed b. circle, closed
c. parabola, open d. parabola, closed
Question 3Modern astronomers suspect the corona is heated by
a. shock waves rising from below the photosphere.
b. the solar wind.
c. magnetic carpets.
d. shock waves rising from below the photosphere, the solar wind, and the solar magnetic field.
e. none of the others.
Question 4If a satellite is in orbit around Earth and the satellite's altitude increases, then the circular velocity __________________.
a. decreases b. increases
c. is zero d. None of the other choices are correct.
Question 5Sunspots occur in ______________ with the leading spot and the trailing spot having ________________ magnetic polarity.
a. singles, same
b. pairs, opposite
c. singles, opposite
d. pairs, same
e. none of the others
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