#### Lesson 9

## Probabilities, Uncertainties & Units used to Quantify Climate Change

The IPCC assesses materials across many different scientific fields each with its own distinct type of data, indicators, and analyses. In order to communicate uncertainty effectively and consistently, the IPCC defined a framework for the treatment of uncertainty using three different approaches depending on whether the assessment is qualitative, quantitative, or reliant on expert judgment.

**In this lesson you will learn:**

1) How the IPCC addresses issues of uncertainty and confidence.

2) The basis for the IPCC’s three different approaches to uncertainty.

3) How to relate quantitative analysis to the likelihood scale.

**Time Requirement**

This lesson will take between 1 hour to 90 minutes.

**Science Standards covered in this lesson**(click to show)

**National Standards:**

• Math - Data Analysis and Probability Standards

• Select and use appropriate statistical methods to analyze data

• Develop and evaluate inferences and predictions that are based on data

• Understand and apply basic concepts of probability

**AP Environmental Science Topics:**

• Humans alter natural systems

**Wisconsin Common Core Standards:**

• Math - Statistics and Probability

Students will interpret linear models.

• Math - Statistics and Probability

• Science C – Science Inquiry