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Created by Jess Molyneux
about 9 years ago
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Copied by Jess Molyneux
about 9 years ago
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Question | Answer |
What is a drought? | A prolonged period of abnormally low rainfall leading to a shortage of water. |
List some issues associated with a lack of rainfall. (Hint: there are eight) | Risk of drought Lower crop yield Bans imposed Reduced river flow Reservoirs at low level More allergens, dust and dirt in air Death of plants Increase in dirty water (LEDCs) |
List some natural and physical causes of drought. (Hint: there are three) | Weather Global warming El Nino |
How does weather cause drought? (Hint: there are two ways) | Increased amount of anticyclonic (hot and dry) weather means that the air hold less moisture - so less rain In hotter weather there is more evaporation than precipitation |
How does global warming cause drought? | Weather patterns change (e.g. regions become hotter and drier) |
What is El Nino and how does it cause drought? (Bonus: give an example) | A random weather event which reverses normal weather patterns (e.g. years of drought then years of flooding) |
List some human causes of drought. (Hint: there are six) | Overpopulation Over-cultivation Over-extraction Deforestation Politics Enhanced global warming |
How does overpopulation cause drought? | Too many people living in an area may require more water than the area has |
How does over-cultivation cause drought? | Planting too many crops or rearing too many cattle (water intensive) uses an excess of water |
How does over-extraction cause drought? | Removing too much water from wells causes them to dry out |
How does deforestation cause drought? | Cuts down trees which store water and hold soil together |
How can politics be linked to drought? | Rivers and other natural features do not follow the political boundaries Disputes over water and greed |
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