Latitude, Longitude and Time

Grade 10 · Geography

Semester 1 | Period 1 | Week 4

Download the Lessonotes Mobile Liberia app for faster lesson access on Android and iPhone.

Get it on Google Play Get it on the Apple App Store

Subject: Geography

Semester: 1

Period: 1

Week: 4

School Name: ___________________________
Teacher’s Name: _________________________
Subject: Geography
Grade Level: Grade 10
Date: ____________
Week & Period: Week 4, Period 1
Lesson Duration: 45 minutes

Topic: Latitude, Longitude and Time

Sub-Topics:

  1. Lines of Latitude – Equator, Tropics, Arctic/Antarctic circles.
  2. Lines of Longitude – Prime Meridian, Greenwich, 0°–180°.
  3. Graticules – Grid network formed by latitude and longitude.
  4. Poles & Directions – North Pole, South Pole, East, West, North, South.
  5. Time – Local time, Greenwich Mean Time (GMT), International Date Line.

 

Learning Objectives

By the end of the lesson, students should be able to:

  1. Define latitude and longitude.
  2. Identify major lines of latitude and longitude on a globe.
  3. Explain the meaning and importance of graticules.
  4. Locate the poles and describe the cardinal directions.
  5. Explain the relationship between longitude and time difference.

 

Previous Knowledge

Students already know:

  • The Earth is spherical in shape (Week 3).
  • Earth rotates on its axis, giving day and night.

 

Instructional Materials

  • Globe
  • Atlas or world map
  • Ruler and compass
  • Chart showing lines of latitude & longitude
  • Flashcards with different coordinates

 

Lesson Development – ABC Model

A – Anticipation (Warm-up / Starter)

Time: 5–10 minutes

Teacher’s Activity:

  • Ask: “If I want to locate our school on a world map, how can I do it?”
  • Show students a globe/map with a grid.
  • Ask: “Why are these lines drawn across the Earth?”

Learners’ Activity:

  • Respond with ideas (addresses, directions, GPS).
  • Observe the globe and map.
  • Attempt to describe the lines they see.

 

B – Building Knowledge (Main Lesson Body)

Time: 25–30 minutes

Teacher’s Role (Explanation & Notes):

  1. Latitude
  • Imaginary lines running east-west.
  • Measured in degrees north (°N) or south (°S) of the Equator.
  • Major latitudes:
    • Equator (0°)
    • Tropic of Cancer (23½°N)
    • Tropic of Capricorn (23½°S)
    • Arctic Circle (66½°N)
    • Antarctic Circle (66½°S)
    • North Pole (90°N), South Pole (90°S).
  1. Longitude
  • Imaginary lines running north-south from pole to pole.
  • Measured in degrees east (°E) or west (°W) of the Prime Meridian (0°) at Greenwich.
  • Total: 360° of longitude.
  • Important line: International Date Line (180°).
  1. Graticules
  • Network/grid formed when latitude and longitude lines cross.
  • Used to determine the exact location of any place on Earth.
  1. Poles & Directions
  • Poles are the extreme points of Earth’s axis (North Pole, South Pole).
  • Four cardinal directions: North, South, East, West.
  • Intermediate directions: NE, NW, SE, SW.
  1. Longitude and Time
  • Earth rotates 360° in 24 hours → 15° = 1 hour.
  • Local time at a place depends on longitude.
  • GMT (0°) is the standard reference.
  • Moving east → add hours; moving west → subtract hours.

 

Learners’ Role (Activities):

  • Label major latitudes on globe/chart.
  • Trace Prime Meridian and International Date Line.
  • Use coordinates to locate given towns on the map.
  • Solve time-difference problems (e.g., “If it is 12 noon at 0°, what is the time at 45°E?”).

 

Assessment (Formative during class):

  1. What is the latitude of the Equator?
  2. Which longitude divides the Earth into Eastern & Western Hemispheres?
  3. If the Earth rotates 15° per hour, how many hours difference is there between 0° and 60°E?

 

C – Consolidation (Conclusion & Evaluation)

Time: 5–10 minutes

Summary (Teacher):

  • Latitude = east-west lines, measure N/S of Equator.
  • Longitude = north-south lines, measure E/W of Prime Meridian.
  • Graticules = grid system of latitude + longitude.
  • Poles = extreme points, directions based on them.
  • Longitude determines time difference (15° = 1 hour).

Evaluation (Oral/Short Answer):

  1. Define latitude and longitude.
  2. State any two major lines of latitude.
  3. What is the time difference between 0° and 90°E?

 

Assignment:

  1. Draw a diagram of the Earth showing major lines of latitude and longitude.
  2. Explain with examples how longitude affects time.
  3. If it is 6:00 a.m. at Greenwich, what time will it be at 75°E?

 

Differentiation / Inclusive Strategies

  • Struggling Learners: Use flashcards with labeled diagrams of globe.
  • Advanced Learners: Research how GPS uses latitude & longitude.
  • Students with Disabilities: Provide tactile globe or raised maps for better engagement.

 

Teacher’s Reflection (After Class)

  • Students’ engagement: □ High □ Medium □ Low
  • Most challenging concept: _______________________
  • What needs reinforcement: _______________________