Republic of the Philippines Department of Education Region IV-A CALABARZON Division of Quezon Sariaya QUIZ Name: ______________________________________ Score:________ Grade & Section :______________________________ Date:_________ 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?______________________. 2. 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 inexhaustible. 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. ) GOODLUCK!