Thursday, August 15, 2013

Q&A from 207 on Rivers Hydrological cycle and Drainage system/basin

Hi Class, these are the answers to your questions:


Q1) Linus/Darren Heng/Jiaqi/Sheryl/Wei Teng/Jun Hao/Bastian: What is the hydrological cycle and why does it happen? How does the process helps Nature?


Miss ST: The hydrological cycle( H2O cycle) is the continuous movement of water on, above and below the surface of the EarthWater moves from reservoirs, rivers, oceans and to the atmosphere.
The water cycle purifies water, replenishes the land with freshwater, and transports minerals to different parts of the globe. It is also shapes the geological features of the Earth, through  erosion and sedimentation. Finally, the water cycle figures significantly in the maintenance of life and ecosystems.

Q2) Siang Yih: How does the river works and how does people collect a big amount of rain?
Miss ST: Refer to the top answer on hydrological cycle. Rain is collected in the water catchment area such as reservoirs. 

Q3) Darren Tan: What are the four main parts of the water cycle?


Miss ST: The main parts of the water cycle are the processes of evaporation, condensation, infiltration and runoff. In doing so, the water goes through different stages: liquid, solid (ice), and gas (vapor).

Q4) Aloysius/Matthew: What is Evapotranspiration?

Miss ST: It refers to all the Evaporation and plant transpiration from the Earth's land surface to atmosphere. Evaporation is the movement of water to the air from sources such as the soilcanopy interception, and waterbodies. Transpiration is the movement of water within a plant and the subsequent loss of water as vapor through leaves.
File:Surface water cycle.svg






















Q5) Nur Qa'riah: How many percentage of the world is made of river?
Miss ST: Please refer to the distribution of Earth's water below.

Q6) Jun Jie/Cherlyn/Natalie/Audrey: What is a river? How is a river form? Why is there a river?
Miss ST:river is a natural watercourse that flows towards an ocean, a lake, a sea, or another river. Sometimes a river simply flows into the ground or dries up completely at the end of its course, and does not reach another body of water.
Rivers are part of the hydrological cycle and forms from Water collected in precipitation and the release of stored water in natural ice and snowpacks (e.g. from glaciers).

Q6a) Jeremy/Sheena/Simon: What is percolation?
Miss ST: It is the slow movement of water through the soil and rocks.

Q7) Nisha/Sheena: Is there a difference between ground waterflow and infiltration?
Miss ST: Ground waterflow refers to the part of streamflow that has infiltrated the ground. Infiltration is the process in which the water on the ground surface enters the soil.

Q8) Liyi: How is the river connected to the sea?
Miss ST: The lower course of the river flows towards the sea, and is connected at the RIVER MOUTH.
File:Klamath River mouth aerial view.jpg
Q9) Jeremy: What is the difference between the source and the mouth?
Miss ST: The source of the river is where it starts, and is at the UPPER course of the river. The mouth of the river is where it ends, and is at the LOWER course of the river.
 WORDPRESS (nay)

Q10) Gigi: What is confluence? 
Miss ST: confluence is the meeting of two or more bodies of water. It refers either to the point where a tributary joins a larger river, called the main stem, or where two streams meet to become the source of a river.
File:Koblenz im Buga-Jahr 2011 - Deutsches Eck 01.jpg  

Q11) Kieran: What is sediment?
Miss ST: Sediment is a naturally occurring material that is broken down by processes of weathering and erosion. It refers to sand, rocks, and other particles found in the river.

Q12) Zachary/Jonas/Benjamin/Sherwin/Andrea/Simon: What is a drainage basin and what is it for? Is it important?
File:Hydrographic basin.svgMiss ST: This is an Example of a drainage basin. The dashed line is the main water divide of the river basin. It is an area of land where surface water from rain/snow converges(connects) to the end of the river. It is a water catchment area and is part of the hydrological cycle. Yes it is important as part of the water cycle. You have to know how to label it and its different components.
Q13) Kelly:  What is airborne?
Miss ST: It depends on how you are using the word. In Geography, it refers to something that is Carried by or through the air. eg Airborne particles are carried in the air.

Q14: Anoymous: What is a Delta?
Miss ST: You will learn about this in the next two lessons.


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