(a) Highlight four effects of the revolution of... | WAEC SSCE - Geography - 2004 (Essay)

Question 1 Report

(a) Highlight four effects of the revolution of the earth.

(b) A boxing tournament is scheduled to start at 8.00 p.m. local time in Los Angeles, 75°W. At what time should boxing fans in Nigeria, 15°E, switch on their televisions to watch the commencement of the match?

Answer

(a) Four effects of the revolution of the earth

The four seasons: as the earth revolves round the sun with its axis tilted, the overhead sun shifts between the tropics, giving spring, summer, autumn and winter in temperate lands.
Varying length of day and night: at different times of the year, days and nights become unequal in length (long days/short nights in summer and the reverse in winter), except at the equator.
Changing altitude (apparent movement) of the midday sun: the noon sun is high overhead at some seasons and low at others.
Occurrence of equinoxes and solstices, and the basis of the calendar year (365.25 days), leading to a leap year every fourth year.

(b) Time calculation

Match starts at 8:00 p.m. local time in Los Angeles (75°W). Find the time in Nigeria (15°E).

Difference in longitude \( = 75^\circ + 15^\circ = 90^\circ \).

\[ \text{Time difference} = \frac{90}{15} = 6 \text{ hours} \]

Nigeria lies east of Los Angeles, so its time is ahead; we add 6 hours:

\[ 8{:}00 \text{ p.m.} + 6 \text{ hours} = 2{:}00 \text{ a.m.} \]

Nigerian fans should switch on their televisions at 2:00 a.m. (the following day).

Read lesson note on Physical Geography (JAMB)

Answer Details

(a) Four effects of the revolution of the earth

The four seasons: as the earth revolves round the sun with its axis tilted, the overhead sun shifts between the tropics, giving spring, summer, autumn and winter in temperate lands.
Varying length of day and night: at different times of the year, days and nights become unequal in length (long days/short nights in summer and the reverse in winter), except at the equator.
Changing altitude (apparent movement) of the midday sun: the noon sun is high overhead at some seasons and low at others.
Occurrence of equinoxes and solstices, and the basis of the calendar year (365.25 days), leading to a leap year every fourth year.

(b) Time calculation

Match starts at 8:00 p.m. local time in Los Angeles (75°W). Find the time in Nigeria (15°E).

Difference in longitude \( = 75^\circ + 15^\circ = 90^\circ \).

\[ \text{Time difference} = \frac{90}{15} = 6 \text{ hours} \]

Nigeria lies east of Los Angeles, so its time is ahead; we add 6 hours:

\[ 8{:}00 \text{ p.m.} + 6 \text{ hours} = 2{:}00 \text{ a.m.} \]

Nigerian fans should switch on their televisions at 2:00 a.m. (the following day).

Read lesson note on Physical Geography (JAMB)

Physical Geography

View Answer

(a) Highlight four effects of the revolution of the earth. (b) A boxing tournament is scheduled to start at 8.00 p.m. local time in Los Angeles, 75°W. At wh...

Download The App On Google Playstore

(a) Highlight four effects of the revolution of the earth. (b) A boxing tournament is scheduled to start at 8.00 p.m. local time in Los Angeles, 75°W. At wh...

Related Questions

Download The App On Google Playstore