The World's Water Supply Is Contained In A Closed System - The Hydrological Cycle
Akopọ
Water is constantly moving between the oceans, atmosphere, land and ice in a vast recycling system that has no beginning or end. This continuous movement, the hydrological cycle, drives the rivers, shapes the valleys and sustains every ecosystem on Earth.
In this lesson you will trace water through its stores and transfers, explore how drainage basins collect and channel precipitation, and learn to read storm hydrographs, a skill that Edexcel tests regularly on Papers 1 and 2.
Awọn Afojusun
- The hydrological cycle: characteristics, stores and transfers
- Features of a drainage basin: source, watershed, channel network, mouth
- Factors affecting river regimes: precipitation, including storm hydrographs, temperature, vegetation, land use, water abstraction, dams
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Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- The hydrological cycle is best described as: A) An open system with external inputs and outputs B) A closed system where water is continuously recycled C) A system that produces new water through volcanic activity D) A linear process from oceans to rivers Answer: B
- Which store holds the largest proportion of Earth's water? A) Ice caps and glaciers B) Groundwater C) Oceans D) Rivers and lakes Answer: C
- What is the transfer called when water moves from the soil into the underlying rock? A) Infiltration B) Throughflow C) Percolation D) Surface runoff Answer: C
- On a storm hydrograph, lag time is measured between: A) The start of rainfall and the end of rainfall B) Peak rainfall and peak discharge C) Base flow and peak discharge D) The rising limb and the falling limb Answer: B
- Which factor is most likely to produce a short lag time and a high peak discharge? A) Dense woodland on permeable sandstone B) Gentle slopes with thick soil C) Urbanised catchment on impermeable clay D) Flat marshland with deep peat Answer: C
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