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Population Densities Name:_____________________________ Block:_____ Date:_____________________ Objective: SWBAT calculate arithmetic, physiological, and agricultural densities and describe the analysis and describe the strengths and weaknesses of each for demographic analysis. Word Wall: Arithmetic density, Physiological density, Agricultural density, arable land Let’s think Back…What was density again?! I remember the definition of density had something to do with….. When studying population, we use density to look at the land and the people that live on the land. Geographers measure density in three ways: 1. ________________________ density 2. ________________________ density 3. ________________________ density TOTAL NUMBER OF PEOPLE ÷ TOTAL LAND AREA. ÷ Do not be fooled---arithmetic density is also called population density. You should be able to identify total number of people divided by total land area as arithmetic density or population density. Formula: Arithmetic Density = _________________ EX. State of Minnesota- POPULATION: 4.4 Million people__ = 52 people per LAND AREA: 84,000 square miles square mile Arable means land that can be used for growing crops. TOTAL NUMBER OF PEOPLE ÷ UNIT OF ARABLE LAND AREA. ÷ Different countries may have very different physiological densities depending on the type of land available. Not all open land is arable land—arable land can be used for crops. Formula: Physiological Density = _________________ EXAMPLE: Japan’s Arithmetic Density is 7,000 people per square mile. USA’s Arithmetic Density is 340 people per square mile. Which country is better suited for farming? TOTAL NUMBER OF FARMERS ÷ UNIT OF ARABLE LAND AREA. ÷ A HIGH agricultural density means that there are MORE farmers CLUSTERED on each piece of farmland. A LOW agricultural density usually tells geographers that there are very large farms with farmers dispersed (spread out) across the farmland. Formula: Agricultural Density = _________________ EXAMPLE: On Farm A, there are 100 farmers for every 20 miles of farmland. The agricultural density of Farm A is 5 farmers per mile of farmland. Guided Group Practice 2.2: Analyzing Population Densities Directions: With a partner of your choice, answer the following questions in complete sentences. USE TABLE 2-1 ON PAGE 53 AS YOUR GUIDE. 1. Which country has the highest arithmetic density? 2. Which country has the lowest population density? 3. Which country has the highest percentage of farmers? Does this country also have the highest agricultural density? If not, name the country that does. 4. Which country has the highest percentage of arable land? 5. Does your group think that a high percentage of arable land means a high percentage of physiological density? Why? 6. Which country has the lowest percentage of farmers? Does this country also have a low agricultural density? How are the two related? *************************Stop and get a stamp from Mr. Roth before moving on*************************** Directions: Use the table below to fill out the chart. Make sure to set up each fraction! Total Total Total Unit of Arable Population Land Area Number of Land Farmers Location A 5,000 people 25 square miles 30 30 square miles Location B 500 people 250 square miles 60 15 square miles Location C 200 people 200 square miles 600 15 square miles Location D 620 people 310 square miles 750 250 square miles Location E 18 people 2 square miles 12 2 square miles Arithmetic Density Physiological Density Agricultural Density Location A Location B Location C Location D Location E Independent Practice 2.2: What do population densities tell us about a place? Directions: Read the scenarios below. After reading the scenarios, use your notes from pages 1 and 2 to answer each question. Hint: look for key terms such as total population, total land area, farmers, and arable land. SCENARIO 1 The new government in Iraq is working to establish more farms across the region. Farms are important n Iraq because the will help boost the economy and create farming jobs for hundreds of citizens. Or so they think…In actuality, what the government does not realize is that not all the land in the country is arable. Without arable land, farms cannot happen. Because you are a brilliant AP Human Geography student, you have been hired by the Iraqi government to figure out how many farms can be established. You know that there are at least 5,000 available farmers and go on to research the arable land available… 1. Which population density would be most helpful in solving the problem? 2. Why do you believe this population density is best? SCENARIO 2 Since 1950, the population in Hartford, Connecticut, the capital of the great state of Connecticut has been increasing! The population explosion is so intense that it takes hours to get though traffic during morning and evening rush hour and lines at the grocery store or mall are very long. In addition, it is close to impossible to find an apartment or house, there is almost not enough room. Because you are a phenomenal AP Human Geography student, you have been hired to figure out what is going on in the city. Is it an issue of land or is it an issue of people? You are going to find out… 1. Which population density would be most helpful in solving the problem? 2. Why do you believe this population density is best? SCENARIO 3 The mayor’s office has announced that every ward in the District of Columbia must create a community garden where citizens in the ward will grow fruits and vegetables to be sold at local farmer’s markets. The profits from the markets will benefit DC Public Schools and other community service projects. The only problem is that the mayor’s office does not have accurate records on the amount of arable land available in each ward. They have a good count on population, but not on arable land. You have been hired to fix this problem… 1. Which population density would be most helpful in solving the problem? 2. Why do you believe this population density is best? .
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