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Reading Guide 20-2: The Sun: Our Very Own Star (Page 618-623)
1.The sun is a large ball of gas made mostly of ________________________ and
_______________________.
THE STRUCTURE OF THE SUN
Match the correct description with the correct term. Write the letter in the space provided.
____ 2. the sun’s outer atmosphere
a. chromosphere
____ 3. the thin region below the sun’s corona
b. core
____ 4. the part of the sun that can be seen from
Earth
c. radiative zone
d. convective zone
____ 5. the region of the sun where gases circulate
e. corona
____ 6. the center of the sun
f. photosphere
____ 7. a very dense region of the sun
ENERGY PRODUCTION IN THE SUN
8. The Sun has been shining on Earth for about ___________________________.
9. An Atom is made up of a nucleus surrounded by one or more electrons, which
have a negative charge. Atoms also contains particles called ________________,
which have a positive charge, and ___________________, which have no charge.
10. Albert Einstein showed that matter and energy are interchangeable, which
means that matter can change into energy. _______________ ________________ is the
process by which two or more low-Mass nuclei join together, or fuse, to form another
nucleus. The sun gets its energy from this.
11. Hydrogen atoms combine to form _________________________.
12. Energy is produced in the center, or ______________________, of the sun.
13 Energy passes from the sun’s core through a dense region called
the___________________ ______________.
14. Hot gases are carried to the sun’s visible surface from a region called
the________________ _______________.
15. Energy leaves the sun as light from a region called the __________________.
SOLAR ACTIVITY
16.The circulation of gases in the sun combines with the sun’s rotation to create
_______________ ________________ that reach far out into space.
17. Why do some areas of the photosphere become cooler than surrounding areas?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
18. Cooler, dark areas of the photosphere of the sun are called _______________.
19. The sunspot cycle lasts about ___________years.
20. How might sunspot activity affect Earth?
_______________________________________________________________
_______________________________________________________________
_______________________________________________________________
21. Regions of very high temperature and brightness on the sun’s surface are
called______________________.
22. How might Earth be affected by the eruption of solar flares?
_______________________________________________________________
_______________________________________________________________
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