Quick Summary: Students will investigate the levels of CO2 in the air from Cape Grim, one of the cleanest sources of air in the world. Using authentic data they will analyse a graph and plot data points on a set of axis. After students have plotted data points they will consider the historic trends by calculating gradients of line segments and comment on what the gradient represents. They will also have the opportunity to investigate another greenhouse gas (GHG) observed at Cape Grim and use this to comment on the levels in more populated areas.
- Students understand how gradient and rate of change relates to authentic data.
- Students know how to calculate midpoints and gradient.
- Students discover the impact of air pollution on a global scale and how the levels of greenhouse gas are changing over time.
- Students take personal action to reduce their own greenhouse gas emissions.
General capabilities: Numeracy, Critical and creative thinking.
Cross-curriculum priority: Sustainability OI.1
Year 9 Mathematics:
- Solve problems involving direct proportion. Explore the relationship between graphs and equations corresponding to simple rate problems (ACMNA208)
- Find the midpoint and gradient of a line segment (interval) on the Cartesian plane using a range of strategies, including graphing software (ACMNA294)
Syllabus Outcomes: MA3‑2WM.
In line with the Australian Curriculum questions are graded to cover understanding, fluency, problem solving and reasoning.
Topic: Number and Algebra
Time required: 40-60 min
Level of teacher scaffolding: Low/Medium – teacher may need to demonstrate some calculations.
Resources Required: Student Worksheet, internet access, Climate Change Digital Toolbox.
Homework and extension opportunities: Students will research another GHG and compare it with the changes they observed in CO2 levels.
Key words: Cartesian plane, coordinate points, gradient, rate, midpoint, data, greenhouse gas, climate change, carbon emissions.
Cool Australia’s curriculum team continually reviews and refines our resources to be in line with changes to the Australian Curriculum.