Chapters 2 pt 2 Flashcards
1
Q
SUB-SOLAR POINT
A
place on Earth at which the Sun is “directly” overhead (perpendicular, at a 90° angle)
2
Q
EQUINOX
A
The time or date (twice each year) at which the sun crosses the equator
- when day and night are of equal length
- Spring (vernal )Equinox: March 20-21
- Fall Equinox (Septemper 22-23)
3
Q
DAY-LENGTH
A
duration of exposure to insolation
4
Q
Sun’s Declination
A
The latitude of the sub-solar point
- 47° of latitude, between the tropic of capricorn and the tropic of cancer)
5
Q
The equator always receives equal hours of day and night? TRUE OR FALSE?
A
TRUE
6
Q
SEASONALITY
A
seasonal variation caused by:
- Sun’s position above the horizon
- changing day length throughout the year
7
Q
SEASONAL VARIATION RESULTS FROM EARTH’S PHYSICAL CHARACTERISTICS
A
FIVE characteristics.
- Revolution
- Rotation
- Tilt
- Axial Parallelism
- Sphericity
8
Q
SEASONAL VARIATION RESULTS FROM THE SUN’S
A
- altitude, declination, day length
