Building off activities 1 to 3, students will explore fire area measurement in hectares, relating it to familiar concepts like the size of a football field. They'll work on problems that involve approximating real fire shapes using common geometric shapes (rectangles and triangles) and calculating fire area in hectares based on these approximations.
Step by step guide
Step 1: Explanation of fire area
Fire area is usually measured in hectares. Introduce hectares (relate it to the area of a football field, for example). Give examples that illustrate conversion from square metres or square kilometres to hectares.
Step 2: Students undertake mathematical problems
Students answer the worksheet questions that require them to approximate the shapes of real fire scars (the fire shapes in the example worksheet are traces of actual fire perimeters, including the Murrundindi fire on Black Saturday 2009) using familiar shapes (i.e. rectangles and triangles) and use these to approximate the area of real fires (converting to hectares).
Related activities within this resources:
Activity 1 - The shape of fire
In this activity, students explore fire intensity, its impact, and the role of wind in shaping fires through video, group discussions, and real-world examples.
20-25 minute class discussion (including 5-minute video), followed by 10 minutes looking at handout and group discussion of the questions
Activity 2 - Linking fire shape to wind speed
This builds on Activity 1 and the concept that wind-driven fires have a roughly elliptical shape.
20-30 minutes for students to work on assigned problems and 15 minute follow-up discussion.
Activity 3 - Fire spreading on hills
Building off activities 1 and 2, students will explore the concept of fire spread on hills.
15-20 minute session to outline concepts and a 30 minute session for students to work on assigned problems.