Practice Exercises
Chapter 16 PSC1515
1. What are the three movements of the Earth?
a.____________________________
b. ____________________________
c. ____________________________
2. The Earth is closer to the Sun in ________________. (July or January).
The Earth revolves around the Sun faster in _________________.(July or
January).
3. The axis of the Earth is at a_______ (33.5o, 66.5o, 90o) angle with the
plane of the ecliptic. The movement of the Earth combined with the
inclination of the axis gives rise to what three phenomena?
a.________________________
b.________________________
c.________________________
4. The plane of the ecliptic is the plane that contains ______________and
___________________.
5. Match the following:
a.
Vernal Equinox
____23.5oN
b.
Winter Solstice
____66.5oN
c.
Summer Solstice ____23.5oS
d.
Tropic of Cancer
____66.5oS
e.
Tropic of Capricorn ____24 hrs of nighttime above 23.5o in Dec.
f.
Arctic Circle
____24 hrs of daylight above 23.5 o in July
g.
Antarctic Circle
____Days and nights are 12 hours long
6. What is the significance of the tropic of cancer? The tropic of Capricorn?
______________________________________________________________
A
B
7. In the above diagram, A is a(n)___________________. The angle of
measurement is called a(n)______________. As the numerical value of
the angle increases the distance from the _______________becomes
larger. This location is in _______________________.
8. In the above diagram, B is a(n)__________________. The angle of
measurement is called a(n)_________________. As the numerical value
of the angle increases the distance from the ________________becomes
larger.
9. The Sun rises in the _____________and sets in the _____________.
As you travel to the west from where you are the time of day becomes
___________________(earlier or later). As you travel to the east from
where you are the time of day becomes _________________(earlier or
later.)
10. The boundary that divides one day from another day is called
the________________________________. It is located in the
__________________.
11. A lunar eclipse only occurs during what phase of the
moon?_______________
12. If the Moon is between the Sun and the Earth it is possible to have a
______________(solar or lunar) eclipse.
13. If the Earth is between the Moon and the Sun it is possible to have a
____________________(solar or lunar) eclipse.
Answers:
1. revolution around the Sun, rotation around the axis, wobbling.
2. January, January
3. 66.5o
Changing seasons, climates, lengths of days and nights.
4. Earth and the Sun
5. d, f, e, g, b, c, a.
6. The limits towards the poles within which the Sun appears directly
overhead during the course of the year.
7 meridian, longitude. Prime meridian Greenwich, England.
8. . parallel, latitude. Equator.
9. east, west. Earlier, later.
10. international date line, in the Pacific Ocean.
11. Full
12. Solar
13. Lunar