SHS2 Geography · Semester 1 Week 19: Maps: Their Elements and Analyses

Lesson notes

Learning Objectives

Indicator: 2.2.1.LI.4 - Draw sectional profiles (annotated) and calculate vertical exaggeration and gradient

By the end of the lesson, learners can:

Define a sectional profile (cross section) and explain its importance in map analysis.
Draw an annotated cross section between two localities on a topographic map, following the correct procedural steps.
Calculate the vertical exaggeration of a drawn profile using the formula (Vertical Scale ÷ Horizontal Scale).
Calculate the gradient between two points on a map using the formula (Vertical Interval ÷ Horizontal Equivalent).
Interpret an annotated cross section to describe the relief and landforms between two places, and evaluate the usefulness of cross sections in real-world planning.

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Curriculum details

Strand: Navigating Our Environment (Strand 2)
Sub-strand: Maps: Their Elements and Analyses (2.1)
Content standard: 2.2.1.CS.1 - 2.2.1.CS.1 Demonstrate skill in map analysis 2.2.1.LO.1 Using the knowledge from maps and scales, reproduce maps, measure distances and areas, determine direction and bearings, and draw cross-sectional profiles between places
Indicator: 2.2.1.LI.4 - Draw sectional profiles (annotated) and calculate vertical exaggeration and gradient
Suggested placement: Semester 1, Week 19 (Week 19 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 76

Exemplars (from the NaCCA curriculum)

Collaborative learning: Using videos, maps and other relevant resources, Learners in small groups discuss the processes involved in drawing an annotated cross section between localities on a topographic map and its importance. Share their opinion with whole class. Think-pair-sharing: Work in pairs to draw an annotated cross section and calculate the vertical exaggeration of the profile.
Project-based Learning: Individually, draw an annotated cross section of two places on a topographic map and calculate the vertical exaggeration of the profile.

Assessment (2.2.1.AS.4). The document marks these depth-of-knowledge levels for this indicator: Level 4 Extended critical thinking and reasoning.

Teaching and Learning Resources:
- Watch videos on map reduction and enlargement on mobile phones, computers/laptops.
- Printed topographical maps
- Topographical maps
- Calculator, thread, paper, measuring tape, etc.