Last updated: July 23, 2020

*Math Skill: Interpreting circle graphs (comparing numbers)*

Science Subject: Our Energy Resources

*Area level: National-scale*

*Environmental Area: Energy*

*Purpose: Understand primary energy sources in our country and develop awareness of our energy **use*

### BACKGROUND FOR THE TEACHER

Our country produces and consumes the world’s second largest amount of energy, second only to China. Primary energy consumption in the United States in 2019 was 100.2 quadrillion BTUs (U.S. Energy Information Administration, 2020).

About 80% of our primary energy sources come from fossil fuels, including petroleum, natural gas, and coal. Of fossil fuels, petroleum makes up the largest portion, and natural gas and coal follow.

The portion of renewable energy account for 11% of total energy.

#### 1) Energy in Indiana 2) Our energy sources 3) Who supplies energy to Evansville?

### TEACHER GUIDE

The purpose of this activity is to enhance students’ skills in interpreting circle graphs. Using information on how much of our energy comes from which energy source in this country, this activity provides 2 tailored to students’ understanding levels. The circle graph used in this activity was created based on data obtained from the U.S. Energy Information Administration.

### worksheet & answer key

*Math Skill: Interpreting circle graphs (comparing numbers)*

Using the circle graph on primary energy consumption by source in the Untied States in 2019, students are asked to find out which portion is the largest/smallest. The graph uses percent to show the size of each portion.

### Related problem

*Math Skill: Interpreting circle graphs (converting percents to fractions)*

energy consumption by source in the Untied States in 2019, students are asked to use skills in both percentages and fractions. The graph uses percent to show the size of each portion. Questions include, “Which energy source has a portion smaller than 1/10?”