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Name______________________________________________ Date ______________ Hour ________________
Directions: Read Ch. 20-2 Pages 706-711 Color the different parts of the Sun as indicated. Use the word bank to
fill in the blanks in the picture and the descriptions below.
A. _____________________
Halo visible during an eclipse, extends into space millions of miles
B. _____________________
Greek word means “color sphere”, visible as a red glow in eclipse
C. _____________________
Greek word means “light” , the layer we can see and gives off light
D. _____________________
Where nuclear fusion of hydrogen into helium takes place in a star.
E. _____________________
Where electromagnetic energy from a star moves through middle of a star
F. _____________________
When sunspots erupt sending out magnetic energy into space
G. _____________________
Interior layer where warm gases rise and gradually cool then sink.
H. _____________________
Dark areas on the Sun that are areas of gas cooler then gases around them.
Huge loops of gas linking different parts of sunspot regions.
The Sun makes up about _____% of the solar systems mass, exerting a ________________ force on all objects within it.
Name______________________________________________ Date ______________ Hour ________________
Comets, Asteroids, and Meteors
Ch. 20-5 Pages 730-733
Directions: Name and describe how each part of a comet forms.
2. ______________________________________________________
3. ______________________________________________________
Building Vocabulary
From the list below, choose the term that best completes each sentence.
dirty snowball
asteroid belt
Kuiper belt
Oort cloud
4. When a meteoroid enters Earth’s atmosphere, friction causes it to burn up and produce a streak of light
called a(n) __________________________________________________ .
5. A chunk of ice and dust whose orbit is usually a long, narrow ellipse is a(n) __________________ .
6. If a meteoroid hits Earth’s surface, it is called a(n)____________________________.
7. A rocky object that revolves around the sun, but is too small to be considered a planet, is a(n)
_____________________________________________ .
8. A chunk of rock or dust in space that usually comes from broken pieces of a comet or an asteroid is
called a(n) _______________________________ .
9. The region of the solar system between the orbits of Mars and Jupiter is known as the _________________.
10. Clouds of gas and dust on a comet form a fuzzy outer layer called a _______________________.
11. A spherical region of comets on the outer edges surrounding the solar system is the ___________________ .
12. A doughnut-shaped region of comets that begins near Neptune’s orbit is the _______________________.
13. Comets are often called _____________________ because they are made of ice, dust and rocky particles.
14. Asteroids are not classified as planets or dwarf planets because there are too ________ that are too _______
with ___________________ shapes less than a kilometer in diameter.
15. The largest asteroid _____________ is ____________ in shape and was reclassified as a dwarf planet.