Plunge pool:

A plunge pool, also known as a waterfall lake, is a pool, lake, or pond that is small in diameter, but deep. Plunge pools are formed under the force of a natural source, such as a waterfall or rapids, but also as the result of scour from man-made objects such as spillways and bridge abutments. The swirling water, sometimes carrying rocks within it, erodes the riverbed into a basin, often featuring irregular and rough sides. Plunge pools can remain after the waterfall has ceased to exist or the stream has been diverted.
Source:http://en.wikipedia.org/wiki/Plunge_pool

http://en.wikipedia.org/wiki/File:Selandjafoss_plungepool.JPG

-Gracia-

Submarine Canyons:
They are deep valleys between cliffs often carved by a landscape by a river. They are formed underwater,generally at the mouth of rivers.

-Gracia-

Rapids:
A rapid a section of a river where the river bed has a relatively steep gradient, causing an increase in the water velocity and turbulence. It is also a hydrological feature between a run(a smooth flowing part of a stream) and a cascade. A rapid is characterised by the river becoming shallower and having some rocks exposed above the flow surface. As flowing water splashes over and around the rocks, air bubbles become mixed in with it and portions of the surface acquire a white colour, forming what is called "whitewater". Rapids occur where the bed material is highly resistant to the erosive power of the stream in comparison with the bed downstream of the rapids.
Source:http://en.wikipedia.org/wiki/Rapid

http://en.wikipedia.org/wiki/File:Rapids.jpg

-Kimberly-

Waterfalls:
A waterfall is a vertical flow of fast moving water falling from a great height. It forms when a river flows over a horizontal layer a hard rock overlying soft rock. The soft rock is eroded more quickly than the hard rock. Also, a ledge is formed over which the water falls.

http://en.wikipedia.org/wiki/File:Dark_Hollow_Falls.jpg

-Kimberly-

Meanders:
Meanders are formed curves and bends that is noticeable along the river course as a result of a river flowing over flat land. They are formed when the river erodes sideways and deposits the sediments it is carrying on the opposite sides of the curves. 

http://en.wikipedia.org/wiki/File:Tournon_-_confluent_du_Doux_avec_le_Rhône_.JPG

-Gracia-

Floodplains:
When the river flows through a flat valley floor, it deposits most of the sediments it carries. Therefore, the river bed is raised. When it rains heavily, the river will overflow its banks and flood the surrounding low-lying land which forms the floodplain. These floodplains are also fertile areas used for cultivating crops.

http://en.wikipedia.org/wiki/File:Floodislewight.jpg

-Gracia-

Deltas:
They are formed by the process deposition and is a land form that is created at the mouth of a river where the river flows into the ocean, sea, lake, flat arid area or another river. The river has to flow along alternative channels called distributaries when sediments build up and block the flow of the river to the sea. A delta will only form when the river carries a large amount of sediment and the waves along the coast are not too strong until they remove the sediments faster than the river can deposit them.

-Kimberly-

Impacts of Rivers (Evangel)

How do rivers affect people?

Positive Impact Of  Rivers:

Water supply for farming
Rivers are an important source of water for growing crops such as rice and vegetables.

Fertile soil for farming
The sediments deposited on the banks of the rivers increase the fertility of soil and hence the farmers want to cultivate along the river course despite flooding.

Water supply for industry
In industries, water is used for various purposes such as for manufacturing of food products or for cooling machines to prevent overheating.

Recreation and tourism
Rivers are also used for various recreational activities like rafting, canoeing and fishing. Many hotels andresorts are built alongside rivers to attract tourist.

Source of drinking water and food
Rivers are a source of drinking water and food. In places, where water pipes are not built, people depend on rivers for water. Rivers are also rich source of prawns and fish. For example, the mekong river supplies fish to more than 73 million people living along the river.

Production of hydroelectric power
To produce hydroelectricity, dams and turines are built on rivers, especially in the narrow, steep-sided valleys of hills and mountains. Dams trap large amounts of river water, which are stored in the reservoirs built along with the dams. The water is then released onto big turbines. The force of the falling water rotates the turbines rapidly to produce electricity.

Means of transport
Rivers can serve as a means of transport where it is difficult to travel on land. Water taxis, boats and ships transport people or goods from one place to another.

Negative Impact Of Rivers

Flooding
Flooding occurs when the waer in a river overflows its banks. Floods can take lives and cause serious damage to property and crops. A river floods easily when it carries a lot of sediments. As the sediments are deposited along the course, the river bad is raised. This causes the water level of the river to rise. Hence, whenever it rains heavily, the river overflows its banks and floods the surrounding lands.

Evangel

River Features found along the course of the river (Valleys)

River Valleys:

A valley formed by flowing water, or river valley, is usually V-shaped. The exact shape will depend on the characteristics of the stream flowing through it. Rivers with steep gradients, as in mountain ranges, produce steep walls and a narrow bottom. Shallower slopes may produce broader and gentler valleys, but in the lowest stretch of a river, where it approaches its base level, it begins to deposit sediment and the valley bottom becomes a floodplain.

http://www.connect-123.com/wordpress/wp-content/uploads/2009/08/hex-river-valley.jpg

Glacier Valleys:

A valley carved by glaciers, or glacial valley, are normally U-shaped. The valley becomes visible upon the recession of the glacier that forms it. When the ice recedes or thaws, the valley remains, often littered with small boulders that were transported within the ice. Floor gradient does not affect the valley's shape, it is the glacier's size that does. Continuously flowing glaciers - especially in the ice age - and large sized glaciers carve wide, deep incised valleys.

Examples of U-shaped valleys are found in every mountainous region that has experienced glaciation, usually during the Pleistocene ice ages. Most present U-shaped valleys started as V-shaped before glaciation. The glaciers carved it out wider and deeper, simultaneously changing the shape. This proceeds through the glacial erosion processes of glaciation and abrasion, which results in large rocky material (glacial till) being carried in the glacier. A material called boulder clay is deposited on the floor of the valley. As the ice melts and retreats, the valley is left with very steep sides and a wide, flat floor. A river or stream may remain in the valley. This replaces the original stream or river and is known as a misfit stream because it is smaller than one would expect given the size of its valley.

http://en.wikipedia.org/wiki/File:Glacier_park1.jpg

Source for the Information:

http://en.wikipedia.org/wiki/Valley

~Kimberly~

Physical Environment vs Human Environment

I think the physical environment is more important. Buildings require glass, metal, bricks etc and all these materials are from nature-the physical environment. Some furniture are also made from wood from trees. Hence, without natural resources from the physical environment, we will not be able to build skyscrapers, buildings etc. As a result, there will be no proper workspace for us to work in and no proper shelter or housing for us to live in Another reason why the physical environment is more important is because the trees and plants provide us with oxygen to survive. Without any vegetation or plantation, the earth will have less or no oxygen for living things to survive. Vegetation and animals are also our source of food. Without it, we will die from starvation.

~Kimberly~

Buildings:

http://rogerdeng.com/gallery/main.php?g2_view=core.DownloadItem&g2_itemId=115&g2_serialNumber

Poultry:

http://www.palacechinese.com.au/images/big/b_Roast_Duck.JPG

   Vegetables:

http://mdvegetables.umd.edu/images/vegetables-several%20types.jpg