The Sun has a continuous visual spectrum with dark absorption lines. The continuous spectrum is produced by the ____________ layer while the dark absorption lines are produced by ____________layers.
a. inner chromosphere; outer photosphere
b. inner photosphere; outer chromosphere
c. inner chromosphere; outer corona
d. inner corona, outer chromosphere
Question 2
A(n) ___________________ _ is a circle whose center moves in a circular orbit around the Earth.
Fill in the blank(s) with correct word
