Astronomy 4
Reading Overview for Exam 2



Key Terms

Chapter 4
lunar phases
sidereal month
solar month (synodic month)
umbra
penumbra
total eclipse (lunar or solar)
partial eclipse (lunar or solar)
eclipse path
annular eclipse
tides
spring tide
neap tide

Chapter 7
solar nebula
extra-solar planets
asteroid
comet
meteor
meteorite
planetesimal
differentiation
terrestrial planet
giant (jovian) planet

Chapter 15
solar wind
sunspot
sunspot cycle
active region
differential rotation
prominence
solar flare
aurora
coronal hole
coronal mass ejection
Maunder Minimum



Review Questions

(Some of these
may be asked as multiple-choice questions.)

Chapter 4
If you looked back at Earth from the moon, what phase would Earth have when the moon was full?  New?  A first-quarter moon?  A waxing crescent? 
What is the phase of the moon during a total solar eclipse? During a total lunar eclipse?
 Why don't total solar or lunar eclipses happen every month?

Chapter 7
Which type of planets have the most moons? Where did these moons likely originate?
What is the difference between a meteor and a meteorite?
What characteristics do the worlds in our solar system have in common that lead astronomers to believe that they all formed from the same "mother cloud" (solar nebula)?

Chapter 15
Why do sunspots look dark?
What is the Zeeman effect and what does it tell us about the Sun?
Which aspects of the Sun's activity cycle have a period of about 11 years?