Download EARTH SCIENCE HOMEWORK 11-7 Sun`s surface

EARTH SCIENCE HOMEWORK, Ch. 25, Sec 2
1. Areas on the Sun’s surface that appear dark because they are
cooler than surrounding areas are called __________. (730, P2)
2. Sunspots aren’t ___________ features of the Sun. The number of
sunspots increases and decreases in a fairly regular pattern
called a _________, or solar ___________, cycle. (730, P3)
3. Sunspots are related to several features on the Sun’s
__________. (pg. 730, P4)
4. The intense __________ fields associated with sunspots might
cause ___________, which are huge arching columns of ______.
(pg. 730, P4)
5. Gases near a _________ sometimes brighten suddenly, shooting
outward at high speed. These violent eruptions are called
_______ ___________. (2 words) (pg. 730, P5)
6. Coronal _______ __________ (CMEs) (2 words) occur when
large amounts of electrically charged gas are ejected suddenly
from the Sun’s ____________. (pg. 731, P1)
7. CME’s can occur as often as two or three times a day during a
___________ __________. (2 words) (pg. 731, P1)
8. CMEs can damage ________ in orbit around Earth. They can also
interfere with _______ or power distribution equipment. (pg.
731, P2)
9. CMEs can also cause ________. High energy particles contained
in CMEs and the solar wind are carried past Earth’s ___________
_____. (2 words) (pg. 731, P2)
10.
Light from the Sun reaches Earth in about _______ minutes.
(pg. 732, P1)
11.
The Sun is unusual in one way. It is not close to any other
________. (pg. 732, P2)
12.
When two stars orbit each other, it is called a ___________
star system. When three stars orbit each other, it is called a
__________ star system. (pg. 732, P2)
13.
The closest star system to the Sun – the __________
__________ system (2 words), including Proxima Centauri- is a
triple star. (pg. 732, P2)
14.
In a _______ __________ (2 words), many stars a relatively
close, so the gravitational attraction among the stars is
_________. (pg. 732, P3)