Geographic diffusion involves the propagation of innovation or other phenomena, focusing on spread from place to place, leading to maps that differ from one time to another.
What is an example of diffusion in human geography?
Expansion diffusion is when innovations spread to new places while staying strong in their original locations. For example, Islam has spread throughout the world, yet stayed strong in the Middle East, where it was founded.
Why is diffusion important in geography?
Improved understanding of innovation diffusion across locations and through social connections can provide us with new insights into the spread of information, technological progress and economic development.
What are the different types of diffusion?
Diffusion can be divided into two main types, namely, simple diffusion and facilitated diffusion.
What are the 4 types of diffusion?
- Contagious Diffusion.
- Hierarchical Diffusion.
- Stimulus Diffusion.
Where does simple diffusion occur?
Simple passive diffusion occurs when small molecules pass through the lipid bilayer of a cell membrane. Facilitated diffusion depends on carrier proteins imbedded in the membrane to allow specific substances to pass through, that might not be able to diffuse through the cell membrane.
What is diffusion in anthropology?
Diffusion may be simply defined as the spread of a cultural item from its place of origin to other places (Titiev 1959:446). … Diffusionist research originated in the middle of the nineteenth century as a means of understanding the nature of the distribution of human cultural traits across the world.
How many diffusions are there?
Three types of diffusion are distinguished, viz., molecular, Brownian, and turbulent. Molecular diffusion occurs in gases, liquids, and solids; both diffusion of molecules of extraneous substances (impurities) and self-diffusion are observed. Molecular diffusion occurs as a result of thermal motion of the molecules.
How does diffusion occur?
Diffusion occurs when particles spread. They move from a region where they are in high concentration to a region where they are in low concentration. Diffusion happens when the particles are free to move. This is true in gases and for particles dissolved in solutions – but diffusion does not occur in solids.
What are the 3 types of diffusion?
- (i) Simple diffusion is when ions or molecules diffuse from an area of high concentration to an area of low concentration.
- (ii) In osmosis, the particles moving are water molecules.
What is example of diffusion?
Perfume is sprayed in one part of a room, yet soon it diffuses so that you can smell it everywhere. A drop of food coloring diffuses throughout the water in a glass so that, eventually, the entire glass will be colored.
Which is the best definition of diffusion?
1 : the act of spreading or allowing to spread freely. 2 : the mixing of particles of liquids or gases so that they move from a region of high concentration to one of lower concentration. diffusion.
What are the 3 characteristics of diffusion?
- Temperature (affects kinetic energy of particles in solution)
- Molecular size (larger particles are subjected to greater resistance within a fluid medium)
- Steepness of gradient (rate of diffusion will be greater with a higher concentration gradient)
What are the 5 types of diffusion?
Ideas spread when people move. You just studied 5 terms! Relocation, expansion, contagious, hierarchical, and stimulus diffusion.
What is the most common type of diffusion?
Sequential diffusion is the process in which items being diffused are transmitted by their carrier agents as they evacuate the old areas & relocate to new areas. The most common form of relocation diffusion involves the spreading of innovations by a migrating population.
What are the 3 ways cultural diffusion occurs?
In essence, there really are only three types of cultural diffusion: relocation, expansion and maladaptive.
What is the difference between osmosis and diffusion?
In diffusion, particles move from an area of higher concentration to one of lower concentration until equilibrium is reached. In osmosis, a semipermeable membrane is present, so only the solvent molecules are free to move to equalize concentration.
What is the end result of diffusion?
Since diffusion moves materials from an area of higher concentration to the lower, it is described as moving solutes “down the concentration gradient.” The end result of diffusion is an equal concentration, or equilibrium, of molecules on both sides of the membrane.
What is a simple definition of diffusion?
diffusion, process resulting from random motion of molecules by which there is a net flow of matter from a region of high concentration to a region of low concentration.
What is meant by diffusion in sociology?
Sociological diffusion occurs when a social group or organization develops an innovation: a new idea or behavior. Diffusion, in the context of corporations and businesses, is a way for an idea to be fleshed out.
What is diffusion in contemporary?
Diffusion refers to the dissemination of any physical element, idea, value, social practice, or attitude through and between populations. … Diffusion is most closely associated with the social sciences, particularly rural sociology, anthropology, and communication.
What is acculturation and diffusion?
Definitions of Diffusion and Acculturation: • Diffusion is when cultural traits of a culture spread to another culture. • Acculturation is when a culture completely transforms and becomes accustomed to the new cultural traits.
What is an example of diffusion in plants?
In order to carry out photosynthesis a plant requires carbon dioxide. On the underside of leaves there are small holes known as stomata, carbon dioxide diffuse into the leaves via these. Leaves produce oxygen and water vapour and these in turn diffuse out via the stomata.
Is osmosis simple diffusion?
Osmosis is a type of simple diffusion in which water molecules diffuse through a selectively permeable membrane from areas of high water concentration to areas of lower water concentration.
How do you explain diffusion to a child?
Diffusion is a physical process where molecules of a material move from an area of high concentration (where there are many molecules) to an area of low concentration (where there are fewer molecules). Diffusion usually happens in a solution in gas or in a liquid.
What is diffusion Class 9?
Diffusion- The mixing of a substance with another substance due to the motion or movement of its particles is called diffusion. … The diffusion of one substance into another substance goes on until a uniform mixture is formed.
Why does cell use diffusion?
The membrane allows passage of beneficial materials by the process of diffusion. The evolution of cellular diffusion allows cells to cordon themselves off from and differentially interact with their immediate environment.
Where does diffusion occur in plants?
Diffusion and the leaf
It diffuses through small pores called stomata. The stomata are mainly in the lower epidermis (the underneath surface) of leaves. During photosynthesis, oxygen levels inside the leaf increase. This causes oxygen to diffuse out of the leaf into the air.
Is diffusion active or passive?
There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done.
What is the main characteristics of diffusion?
One of the main characteristics of diffusion is the movement of molecules along the concentration gradient. While this could be facilitated by other molecules, it does not directly involve high-energy molecules such as adenosine triphosphate (ATP) or guanosine triphosphate (GTP).
What is diffusion in geography quizlet?
Diffusion. The movement of people/ideas/objects from a place of origin to another place over time. Cultural Diffusion. The spread of ideas, customs, and technologies from one people to another.
What type of diffusion spreads language?
Language shift can be described as a diffusion process in accordance with physical diffusion—as spread of the dominant language and resulting retreat of the minority language.
What type of diffusion is colonization?
Colonialism is a violent form of cultural diffusion. Here’s an example: Christianity started in Israel but is now practiced all over the world, initially spread by the Roman Empire. Through missionaries that spread religious beliefs, Christianity is one of the universalizing religions practiced worldwide.