Population Distribution & Density [AP Human Geography Review Unit 2 Topic 1]

0:00hello there geographers and welcome back

0:01to the Mr sin Channel today we're

0:03starting unit 2 of AP Human Geography as

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0:10out my ultimate review packet for more

0:11help with your AP Human Geography study

0:13today the total world population is

0:16about to reach 8 billion people

0:17depending on when you watch this video

0:19we might have already passed this number

0:21so the question we have to ask ourselves

0:22is is the world becoming overpopulated

0:25it seems like an easy question to answer

0:26after all 8 billion people is a lot of

0:29people but this question is more

0:30complicated than you might think one

0:32problem we have with answering this

0:34question is that people are not spread

0:36out evenly across the globe this becomes

0:39evident when looking at this cartogram

0:40which shows the different populations of

0:43each country in the world today we can

0:44see that there are four big regions that

0:46have over two-thirds of the world's

0:48population living in South Asia which

0:50consists of countries like India

0:52Bangladesh and Sri Lanka East Asia which

0:55is made up of countries like China Japan

0:57and the Korean Peninsula Southeast Asia

0:59which is made up of a variety of

1:02different countries such as Thailand the

1:04Philippines and Vietnam just to name a

1:06few and lastly Europe which unlike the

1:08other regions has people located closer

1:11to Natural Resources instead of grouping

1:13around the rivers and oceans which is

1:15particularly due to the Industrial

1:17Revolution and the location of raw

1:19resources so since each country has

1:21different populations and their

1:23populations are dispersed differently

1:25it's hard for us to answer the question

1:27of is the world overpopulated in fact

1:29maybe we should be asking are certain

1:31countries over populated well if we

1:33change our scale from a global scale to

1:36a national scale or even a local scale

1:38we can see that even this question

1:39becomes more difficult to answer for

1:42example when looking at China's

1:43population density notice that the

1:45majority of the areas with a higher

1:46population density are near the coast of

1:49China or near China's river this isn't

1:51something by chance or something unique

1:53to China in fact if we look at different

1:55population clusters around the world we

1:57can see common themes that revolve

1:59around the different different site and

2:00situation Factor throughout the world we

2:02can see that people tend to settle by

2:04rivers oceans fresh water and fertile

2:07soil this is because people need food

2:09and water to live plus access to oceans

2:11and rivers that connect to other

2:12Geographic areas allow places to

2:15participate in trade and commerce with

2:17places around the world we can see that

2:19people also gravitate towards areas with

2:21economic opportunities political

2:23stability desired cultural preferences

2:26or may live in a place due to historical

2:28events that created the settlement so

2:30even when looking at a country it can be

2:32hard for us to tell if the country

2:33overall is overpopulate because people

2:35will be dispersed differently in each

2:37country now since we talked about places

2:39where people want to live we also need

2:41to talk about places where people

2:42generally do not want to live these are

2:44often places that are too dry too wet

2:46too cold or too hot areas that are too

2:49dry make it difficult to grow crops

2:51which does not help create a stable

2:53Society a similar problem actually

2:54exists for places that are too wet soil

2:57becomes oversaturated which ends up

2:58killing the crops places that are too

2:59cold or too high are often difficult to

3:02live in and do not provide the adequate

3:04resources needed for society to flirt

3:06today thanks to advancements in

3:07technology we can see that people live

3:09in places where it was never possible to

3:11have permanent settlements before this

3:13ability for us to modify and change our

3:15environment to make less hospitable

3:16areas more hospitable is known as

3:18environmental possibilism a concept we

3:20reviewed from unit one so we can see

3:22that depending on the different site and

3:24situation factors a place may be more

3:26likely to have a higher population

3:27density while other factors May promote

3:29a lower population density remember

3:31population density is different from

3:33population distribution population

3:35density is referring to the number of

3:37people in an area while population

3:39distribution is the spread of people in

3:41an area when looking at density we can

3:43see that there are three different types

3:44of density that you'll see in AP Human

3:46Geography the first density is the

3:48arithmetic density to find this density

3:50we are going to take our total

3:52population and divide by the amount of

3:54land this is one of the easiest

3:56densities to find this density shows us

3:58how many people are living on each unit

4:00of length if this number is really high

4:02it means that there are more people

4:03living near each other if the number is

4:05a smaller number it shows that there are

4:06fewer people living on each unit of land

4:08one thing to remember when looking at

4:10this density is when we say that we're

4:12dividing by the total amount of land we

4:14mean the entire land map which could

4:15include land that is not inhabitable or

4:17land that currently has no one living on

4:19so just because a country's arithmetic

4:21density is 80 does not mean that each

4:23unit of land has 80 people living on it

4:25the next density is the physiological

4:27density to find this density you're

4:29going to take the total population and

4:31divide it by the total amount of arable

4:33land notice here I said arable land and

4:35not total land area we are only

4:36factoring in land that can produce food

4:38this density shows us how much food we

4:40need to produce from one unit of arable

4:42land the higher the number is the more

4:44food we need to produce and the more

4:46stress we are going to put on our land

4:48societies with a really high

4:49physiological density risk to

4:51certification and risk destroying their

4:53arable land by depleting the nutrients

4:55in their soil which may force them to

4:57have to rely on importing food from

4:59other Society 90s or countries instead

5:01of being able to grow it themselves the

5:03last density is our agricultural density

5:05to find this density you're going to

5:07take the amount of farmers and divide

5:09them by the total amount of arable land

5:10this density shows us how advanced the

5:12technology is or how efficient a society

5:14is at producing food the higher this

5:16number is the more manual labor a

5:18society is using to produce food which

5:20would indicate that there's a less

5:21technology being used in the field of

5:23Agriculture or less effective

5:25agricultural practices being utilized

5:27the lower this number is the less human

5:28labor is needed which indicates more

5:31efficient agricultural practices these

5:33densities by themselves show different

5:34aspects of society but where the real

5:36insight comes from is when you compare

5:38them here let me show you let's say we

5:40are comparing two countries here we have

5:42country a and Country B right away we

5:44can see that country AIDS population has

5:46a lower population density their

5:48arithmetic density is only 32.3 while

5:51country B's arithmetic density is 109.63

5:55now we can also notice that country a

5:57has a larger population but if we look

5:59at at both countries physiological

6:01density we see that country A's

6:03physiological density is lower than

6:05country B this tells us that country a

6:07has more arable land and will have an

6:09easier time feeding their population the

6:11amount of food that needs to be produced

6:12per each unit of land is less for

6:15Country a than it is for Country B but

6:17at the same time we can see that country

6:18a is less efficient with their

6:20agricultural production their

6:21agricultural density is 3.88 while

6:24country B's agricultural density is 2.80

6:27and while that is not a drastic

6:28difference it does show us that country

6:30B has slightly more efficient

6:32agricultural practices or uses more

6:34technology for the production of food

6:36all this tells us that country B has

6:38less of a need for people to work in the

6:40field of Agriculture which allows those

6:43people to be able to work in other

6:44Industries which will lead to more

6:46economic growth in the future remember

6:48if countries need more people to work in

6:50agriculture that means less people

6:52working in other areas of the economy

6:54understanding these different densities

6:55allows us to gain insight into different

6:57Geographic areas around the world world

6:59if you need more help understanding

7:01these different densities go check out

7:02my ultimate review packet there's more

7:05practice in the packet to make sure

7:06you're understanding all these Concepts

7:08but before you do that you need to

7:09answer the review questions on the

7:11screen right now and check your answers

7:12in the comment section down below don't

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7:19content as always I'm Mr sin thank you

7:22so much for watching and I will see you

7:24next time online