General Revision Flashcards
Revision for upcoming Exam
What is the definition of drainage basin?
The area of land drained by a major river and its tributaries
What is the definition of tributary?
A fresh water stream that feeds into a larger stream or river
What is the definition of confluence?
Occurs when two or more flowing bodies of water join together to form a single channel
What is the definition of river source?
Where the river begins
What is the definition of river mouth?
Where a river flows into a larger body of water, such as another river, a lake/reservoir, a bay/gulf, a sea, or an ocean.
What is the definition of watershed?
An area of land that drains or “sheds” water into a specific waterbody.
How are waterfalls formed?
Waterfalls usually form in the upper stages of a river. As the river flows over bands of different rock, the water erodes soft rock more quickly than hard rock. This undercuts the hard rock and leaves it overhanging. Because it is no longer supported by the soft rock, it eventually collapses to form a waterfall.
What are the three types of erosion used to make a water fall?
Hydraulic action
Corrasion
Corrosion
What is hydraulic action?
Hydraulic action – when the sheer force of the water gets into small cracks and breaks down the rock
What is corrasion?
Corrasion – when the river bed and banks are eroded by the load hitting against them
What is corrosion?
Corrosion – when the river water dissolves minerals from the rocks and washes them away
What is a megacity?
A city with a population of over 10million.
What are some examples of a megacity?
New York, London, Tokyo, Shanghai
What is urbanisation?
The increase of people living in a town or city.
What is the Burgess Model?
The Burgess Model is based on the idea that land values are highest in the centre of a town or city.
