TERM – 1^{ST} TERM
WEEK FIVE
Class: Senior Secondary School 1
Age: 15 years
Duration: 40 minutes of 5 periods each
Date:
Subject: Geography
Topic: Latitude and longitude 2
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers,
demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures
INSTRUCTIONAL PROCEDURES
PERIOD 12
PRESENTATION 
TEACHER’S ACTIVITY 
STUDENT’S ACTIVITY 
STEP 1 INTRODUCTION 
The teacher explain and show students how to calculate distance of places using the lines of latitude 
Students in pairs, calculate the distance of places using lines of latitude 
STEP 2 EXPLANATION 
Teacher explain and show students how to calculate local time of places using lines of longitude. 
Students in small group calculate the local time of places using the lines of Longitude 
STEP 3 DEMONSTRATIO N 
Teacher explain how international dateline, standard time and world time zones account for differences in time and dates globally 
Students as a class explain how international dateline, standard time and world time zones account for differences in time and dates globally. 
STEP 4 NOTE TAKING 
The teacher writes a summarized note on the board

The students copy the note in their books 
NOTE
LATITUDE AND LONGITUDE
Calculate the distance of places using the lines of Latitude
Procedures
I. Locate the two processes involved
II. Find the latitude difference between two places involved the formulaused.
Example 1. Calculate the distance between the equator (Lat00) and Egypt (300N)
Solution
I. Locate the two places involved
Latitude of equator = 00
Latitude of Egypt = 300N
II. The difference in latitude: 00+ 300= 30
Since 10 = 111km
Therefore, 300 = 111 x 30
= 3,330km
Example 2. Calculate the distance between Lagos (40N) and Cairo (300N)
Solution
I. Locate the two places involved
Latitude of Lagos = 40N
Latitude of Cairo = 300N
II. Latitude difference= 300N –40N = 260
Since 10 = 111km
Therefore 260= 111km x 260= 2886km
The distance between the equator and Egypt is 3,330km
Procedures for calculating local time
Example 3: What will be the local time in Nigeria (longitude 150E) when it is 5:00pm in Ethiopia(Longitude 450E)
Solution
First, Locate the places invoved in the question.
Nigeria(150E)  ?
Ethiopia (450E) –5:00pm
NOTE: There are two lines. Nigeria has to come first before Ethiopia because the longitude increases from 00 to 1800E Eastward. So, 150E come first before 450E
Secondly, find the longitude difference, which is:
From the question, both countries, longitude are in the East (i.e. 150E and 450E) so we have to subtract.
Hence, the longitude difference is 450E –150E = 300
Now, connect the longitude difference to time
3600= 24 hours
150 = 1 hour
10 = 4 minutes
From the question, the longitude difference is 300, therefore 300 should be connected to time, since 150 = 1 hour
Therefore, 300/150 = 2 hours
OR
300 x 4 min/ 60 = 120/60 = 2 hours
International dateline, Standard time and World time zones
The International Date Line (IDL) is an imaginary line located at approximately 180 degrees longitude. It marks the transition from one calendar day to the next. When you cross the IDL from west to east, you subtract a day, and when you cross from east to west, you add a day. This accounts for differences in dates globally.
Standard time is based on dividing the world into time zones, each 15 degrees of longitude apart. The Earth is divided into 24 time zones, and within each zone, the time is generally the same. This helps coordinate activities globally and standardizes timekeeping.
World time zones ensure that regions within the same time zone share a common standard time, reducing confusion and allowing for coordinated activities. It's important for global communication, transportation, and other international interactions.
EVALUATION: 1. If the distance between Lagos (40N) and Bamako is 1,665, what latitude is Bamako, assuming that Lagos and Bamako are in the same hemisphere?
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively