Use Each of the Terms Below Just Once to Complete the Passage
Name ______Date______Hour______
29.1 The Sun
Use each of the terms below just once to complete the passage.
chromosphere corona gaseous ions mass
photosphere solar eclipse solar system solar wind
The Sun is the largest object in our (1) ______. Its (2)______controls the motions of the planets. The center of the Sun is very dense. The high temperature at its center causes the solar interior to be (3) ______throughout.
The visible surface of the Sun is called the (4) ______. It is the lowest layer of the Sun and is approximately 400km (249mi) in thickness. The average temperature is 5,800°K (9,980°F).
Above the visible layer is the (5) ______. It is approximately 2,500km (1,553mi) thick and has a temperature of nearly 30,000°K (53,540°K) at the top. Without special filters, this layer is visible only during a (6) ______.
The top layer of the Sun’s atmosphere is the (7) ______. It has a temperature range of
1 million to 2 million °K (1,799,540°F to 3,599,540°F). Gas flows outward from this layer at high speeds and forms the
(8) ______. It is made up of charged particles, or (9) ______, which flow outward through the entire solar system.
Match the terms in column B to the correct meaning in column A.
Answerê / Column A / Column B
10. Cooler areas on the surfaces of the photosphere
that appear darker than the surrounding areas
on the Sun / a. Prominence
11. A period of 22.4 years in which the number of
sunspots on the Sun changes regularly and the
Sun’s magnetic field reverses. / b. Solar flares
12. Violent eruptions of particles and radiation from
the surface of the Sun. / c. Sunspots
13. Arc of gas ejected from the photosphere / d. Solar activity cycle
14. What is fusion? Where does it take place in the Sun? ______
______
______
______
15. What is the process that transfers the Sun’s energy from particle to particle? Where does this process take place?
______
______
______
16. How far, as a percentage, does the radiative zone extend to the photosphere? ______
______
17. What is the process that carries the Sun’s energy the rest of the way to the Sun’s surface? What carries the energy?
______
______
______
Label each layer of the Sun using the following terms.
convective zone radiative zone core
