The document discusses how to measure and describe gradients on maps and in the field. It explains that gradient measures the steepness of a slope by calculating the rise over the run between two points. An example calculation is shown where the rise is 42 meters and the run is 600 meters, resulting in a gradient of 1 in 14.3. This means that for every 14.3 meters traveled along the ground, one would go up one meter, indicating a gentle slope. The document asks the reader to consider how gradient relates to land use and hazards like bushfires.

1. Gradient

2. Inquiry How do we measure and describe gradients on maps and in the field? How does a map indicate gradients? What is the relationship between gradient and land use?

3. Getting the right answer Gradient measures the steepness of a slope. Step 1 : Measure the rise (difference in height between 2 points) Step 2 : Measure the run (the distance between 2 points). Make sure that you convert the scale into metres Both the rise and run need to be expressed in metres.

4. A worked example Say the rise is 42 metres and the run is 600 metres. 42(rise)/600(run) - Formula (divide the top by itself and the bottom by the top) Divide 42 by itself = 1 Divide 600 by 42 = 14.3

5. Expressing the answer The answer can be expressed in three ways: a) As a statement 1 in 14.3 b) As a ratio 1: 14.3 c) As a representative fraction 1/14.3

6. What does the answer really mean? What does 1 in 14.3 mean? It means for every 14.3 metres travelled along the ground between the two points you would go up one metre. This is a gentle or gradual slope.

7. Now think of some examples of how gradient relates to land use

8. How does the gradient of the slope contribute to the severity of bushfires?

9. Create a question on gradient and test another student Make sure you have the right answer before you test them