1. Introduce the activity.
Ask: What do you think the population of the United States is? Have students check their predictions against the U.S. Census Bureau Population Clock. Then ask students to predict which states are most and least populated. Tell them they can confirm their predictions later in this activity. Explain that students will calculate the population density for each individual state and then the United States as a whole. Write the formula for figuring out population density on the board:
number of people ÷ the area they occupy = population density
2. Have students complete the worksheet.
Provide each student with a copy of the worksheet United States Population Density and a calculator. Have students use QuickFacts on the U.S. Census Bureau website to get current land area and estimated population data. Then ask students to use the population density formula and a calculator to calculate the population density for each state. Next, have students rank the states from highest population density to lowest using numbers 1–50. Finally, to calculate the average for the entire United States, have students first total the land area for each state, then the estimated population for each state, and then use the same formula to calculate population density.
3. Discuss the results as a class.
As a class, identify the states with the highest and lowest population densities. Discuss possible reasons a state might have a high population density, such as:
- a large total population
- a small land area
- a fairly large population, but a significantly smaller land area
Ask: What is the ranking of our state with the current data?
Make informal observations as students calculate the density populations for the states. You can also assess students’ understandings of population density by asking: What does the population density of a country or state tell you?
Extending the Learning
Encourage students to use this same technique to calculate the population density for cities within their own state or for particular countries of interest.
Subjects & Disciplines
- calculate the population density for each state and the United States as a whole
- identify multiple reasons for high population densities
- Information organization
What You’ll Need
Materials You Provide
The resources are also available at the top of the page.
- Internet Access: Required
- Tech Setup: 1 computer per learner
- Computer lab
- Small-group instruction
Population density describes the number of individuals occupying an area in relation to the size of the area they occupy. It’s helpful to analyze the population density of the United States at different scales in order to find patterns.
- population density