Uploaded by Milagros Fernandez

Quiz about Sun

Republic of the Philippines
Department of Education
Division of Quezon
Name: ______________________________________
Grade & Section :______________________________
I. Identify the regions of the Sun lettered on Figure 1
(a) ____________________
(b) ____________________
(c) ____________________
(d) ____________________
(e) ____________________
(f) ____________________
Figure 1
II.FILL IN THE BLANKS. Read the following text and be able to fill in the blanks.
1. What do you call the region of the sun that came from Greek term “color ball,” which means is a thin,
transparent layer that extends about 10,000 km (6000 miles) above the photosphere?______________________.
Normally during a total eclipse of the Sun the chromosphere glows red due to its ____________________ gas.
3. What do you call the sun’s region wherein it came from the Latin “crown,” is the outermost atmosphere just
above the chromosphere?_________________________________.
4. The corona shines bright at _______________wavelengths.
5. The Nebular theory, first proposed by German philosopher named _____________________________in
(1724–1804), says that our Sun and its planets formed together from a rotating cloud of interstellar gas and dust
called the solar nebula about 5 billion years ago.
6. About how many minutes does it take for sunlight to travel 1 AU? _________________________________.
7. The Sun’s luminosity L°. is _______________________________ wherein the Solar energy is practically
8. The average distance between Earth and the Sun, called the astronomical unit (AU), which is about __________
million km (93 million miles).
9. More than ____________ chemical elements have been identified in the Sun’s spectrum where the Sun’s outer
layers likely have the same chemical composition as the Sun had at birth: about 71 percent hydrogen, 27 percent
helium, and 2 percent
other elements by weight. The Sun’s core probably has subsequently changed to about 38 percent helium in
nuclear fusion reactions.
10. The period of rotation, or the length of time for one complete turn, is fastest at the Sun’s equator is about
_________ days, slower at middle latitudes, and slowest at the poles is about 35 days.
III.ESSAY: Write a short summary describing one phenomena that indicate violent activity
on the Sun (and by extension to other stars), and name their probable cause. ( 4 pts. )