Download the Lessonotes Mobile Liberia app for faster lesson access on Android and iPhone.
Subject: Social Studies
Semester: 1
Period: 1
Week: 3
School Name: ___________________________
Teacher’s Name: _________________________
Subject: Social studies
Grade Level: Grade 7
Date: ___________________________
Week 3 Lesson Duration: 45 minutes
Week & Period: Week 3, Period 1
Topic: Size and Shapes of Earth; Axis of the Earth
Sub-topic: Diameter, Spherical Shape, Evidence, Axis, Significance
Learning Objectives
By the end of the lesson, students should be able to:
- Describe the size and shape of the Earth
- Explain the concept and significance of the Earth’s axis
- Analyze evidence that proves the Earth is spherical
Previous Knowledge
Students already know:
• Earth is the third planet from the Sun
• Basic features of planets and the solar system
• Rotation and revolution concepts
Instructional Materials
• Textbook: Social studies for Grade 7
• Teaching aids: Globe, lamp/torch, charts of Earth, images of Earth from space, string or markers for demonstrating axis
• Students' notebooks and writing materials
Lesson Development – ABC Model
A – Anticipation (Warm-up / Starter)
Time: 5–10 minutes
Activity: The teacher will ask the class:
• “Which shows the real shape of Earth – a globe or a flat map?”
• “Have you ever noticed a ship disappearing hull-first over the horizon?”
The teacher will record their responses on the board.
Teacher’s Role: Guide a short brainstorming session and correct misconceptions about the shape and size of the Earth
Learner’s Role:
• Share observations and prior knowledge about Earth’s shape
• Respond verbally and engage in discussion
B – Building Knowledge (Main Lesson Body)
Time: 25–30 minutes
Teacher’s Role: Explain the size, shape, and axis of the Earth using detailed examples, diagrams, and practical demonstrations; link concepts to observable phenomena; encourage learners to participate in hands-on activities.
Learners’ Activities (Expanded):
• Size of Earth: Equatorial diameter approximately 12,756 km; polar diameter approximately 12,714 km; Activity – compare Earth’s size with other planets or familiar distances to visualize scale.
• Shape of Earth: Nearly spherical (oblate spheroid) – slightly flattened at poles; Evidence – ships disappearing hull-first over horizon, lunar eclipse shadow on Moon, photographs from space; Activity – use a ball to simulate curvature and demonstrate how partial obstruction shows roundness.
• Axis of Earth: Imaginary line through the North and South Poles, tilted at 23.5° relative to orbital plane; responsible for seasons; Activity – demonstrate tilt and seasonal sunlight variations using globe and lamp. Students observe which hemisphere receives direct sunlight at different positions in orbit.
• Significance: Rotation around axis causes day and night; tilt causes seasonal variations; understanding Earth’s axis is crucial for navigation, climate study, and astronomy.
Assessment Checks: Ask “What is the approximate equatorial diameter of Earth?”; “Name two evidences that Earth is spherical”; observe students demonstrating tilt and curvature with globe activity; quick oral quiz on axis effects.
Notes (Expanded & Detailed): Earth is an oblate spheroid – nearly spherical but slightly flattened at the poles due to rotation. Equatorial diameter is slightly larger than polar diameter. The axis tilt of 23.5° causes the Sun’s rays to hit different parts of Earth at different angles, producing seasons. Rotation on the axis leads to day and night. Evidence for Earth’s roundness includes: (1) Ships disappearing hull-first, (2) Lunar eclipse shadow on Moon is circular, (3) Photographs of Earth from space, (4) Variation in star positions when moving north or south. Understanding size, shape, and axis allows prediction of seasons, day length, and navigation routes.
C – Consolidation (Conclusion & Assessment)
Time: 5–10 minutes
Summary: The teacher will ask the students to recall:
• Size and approximate diameter of Earth
• Shape and evidences proving spherical nature
• Concept and importance of Earth’s axis
Evaluation Method (Expanded):
• Exit slip/quiz: Students will write short answers: State Earth’s equatorial diameter; Give two evidences of Earth’s roundness; Explain why the axis tilt is important
• Teacher will collect and quickly review for understanding
• Provide oral feedback before class ends
Assignment (Expanded): Draw a labeled globe showing the axis, poles, and equator; Write a paragraph explaining how the tilt of the axis affects seasons
Differentiation / Inclusive Strategies
• Struggling Learners: Use simple globe demonstrations and visual aids; explain step by step
• Advanced Learners: Research axes of other planets and compare with Earth; present findings
• Students with Disabilities: Provide tactile globes or enlarged diagrams and hands-on activities
Teacher’s Reflection (After Class)
• What worked well? ______________________________________________________
• What needs improvement? _________________________________________________
• Students’ engagement level: □ High □ Medium □ Low
• Next steps: Prepare students for Week 4 – Movement of Earth, Rotation, Revolution, and Time Zones