If a satellite is in orbit around Earth and the satellite's altitude is decreased, then the circular velocity __________________.
a. decreases b. increases
c. stays the same d. is zero
Question 2In some regions of the corona, the magnetic field does not loop back to the Sun, and the gas escapes unimpeded. These regions are called _______ and are believed to be the source of the solar wind.
a. prominences
b. flares
c. granules
d. auroras
e. coronal holes
Question 3Which produces tides on Earth?
a. Moon b. Sun
c. Moon and Sun d. None of the other choices are correct.
Question 4Why is the temperature at the region of a sunspot cooler than the photosphere?
a. They are holes in the photosphere that reveal the lower temperature gases in the deeper layers.
b. They represent points where streams of cool gas from the corona lower the temperature in those regions of the photosphere.
c. Powerful magnetic fields in the sunspots act upon the atoms of the photosphere to prevent them from emitting light.
d. Powerful magnetic fields inhibit the convective flow of the gases of the photosphere downward, allowing them to cool for longer than would normally be permitted.
Question 5If you are standing on the floor then you actions (or lack of action) can count as a test of
a. Newton's first law b. Newton's second law
c. Newton's third law d. None of the other choices are correct.
Question 6The rotation of the Sun's photosphere is
a. fastest at the equator, slower at mid-latitudes, and slowest near the poles.
b. slowest at the equator, faster at mid-latitudes, and fastest near the poles.
c. fastest at the equator, slowest at mid-latitudes and the poles which travel at the same speed.
d. the same regardless of latitude.
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