Today, we’ll cover the Concentric Zone Model. When we talk about different groups of people and different parts of town as being business districts, residential districts or even working class districts, most people don’t think of them as concentric zones. Concentric zones are a model of the way that different social groups are arranged within a city, and a general representation is found in nearly all cities.
The Industrial Revolution is typically most closely associated with European countries, but it also had a profound impact within the United States. It was certainly spurred on by the movement in Europe, but it also became intrinsically American. The Industrial Revolution’s importance in America cannot be glossed over when you are studying for the AP® US History exam. To fully understand how America got from the Revolutionary War to where we are now, you will need to understand the Industrial Revolution. Lucky for you, we are here to help.
Cells have many organelles to memorize and understand. One of the organelles that you must know for the AP® Bio exam is the cell membrane. In this AP® Biology Crash Course Review, we will go over the important information that you need to know for the AP® exam about cell membranes.
Standard deviation is used to test variability in statistics by calculating the average distance from the mean of all the values in a data set. Another way to think of it is to ask, “How much do the values in this data set deviate from the mean value?”
In this article, Endosymbiosis: AP® Biology Crash Course, we will start by reviewing the theory itself. We will then present the evidence that scientists have collected in support of the theory. Finally, we will go over a free response question that was seen on the 2011 AP® Bio exam.
AP® European History is full of significant and memorable wars that shaped the direction of Europe and, by extension, the world. One of these wars is the Thirty Years War. Perhaps your course did not emphasize this war, or maybe you just don’t remember it!
Human populations have moved and settled in many locations over a long period of time. That movement or migration raises several questions for students of human geography. What makes up a population?
The AP® Psychology exam focuses not only on how adults think and act, but also how children develop and come into their own identities. A crucial part of identification is gender typing.
As a student of AP® US History, you probably know the Constitution and all its amendments like the back of your hand. But, did you know that the story of the Constitution is so much more than what you may have heard? Ratifying the Constitution was a long and drawn out process, mostly because the states were divided into what they wanted for a government. Some states wanted a strong, central government. The citizens that shared this idea were called Federalists.
The Nullification Crisis was one of the most dramatic scandals to sweep the nation. Watching the headlines during the presidency of Andrew Jackson was like watching a reality television show today: everyone was wondering what would happen next.