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Flashcards in Chapters 2 pt 2 Deck (8)
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1

SUB-SOLAR POINT

place on Earth at which the Sun is “directly” overhead (perpendicular, at a 90° angle)

2

EQUINOX

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

DAY-LENGTH

duration of exposure to insolation

4

Sun's Declination

The latitude of the sub-solar point

- 47° of latitude, between the tropic of capricorn and the tropic of cancer)

5

The equator always receives equal hours of day and night? TRUE OR FALSE?

TRUE

6

SEASONALITY

seasonal variation caused by:
- Sun's position above the horizon
- changing day length throughout the year

7

SEASONAL VARIATION RESULTS FROM EARTH'S PHYSICAL CHARACTERISTICS

FIVE characteristics.

- Revolution
- Rotation
- Tilt
- Axial Parallelism
- Sphericity

8

SEASONAL VARIATION RESULTS FROM THE SUN'S

- altitude, declination, day length