Flashcards
B - Hot deserts
Cards in this deck (18)
- 1Describe the distribution of hot deserts globally.A majority are on or around the two tropics, normally found around the western side of continents.
- 2Why are hot deserts found there?1. Higher pressure, ending air leads to little condensation and few clouds.
2. Lower latitude leads to suns rays passing through less atmosphere therefore losing less heat.
3. Smaller are of Earths surface has to be heated due to the lesser curvature of the earth. - 3What rainfall is needed for an area to be classed as a desert?250mm and below
- 4Why is it very cold in the night in hot deserts?Since there are no clouds the heat can get in during the day but at night there is no evaporation so clouds cant form and the heat cannot be trapped and as a result will be be cold.
- 5Where does sand originate from?Weathering of rock creates deep deposits of sands.
- 6Why is soil limited?Lack of water and vegetation means soil formation is limited.
- 7Why can deserts grow crops?Some deserts can potentially be fertile if calcium is present from broken down rocks.
- 8Drought tolerant trees are an adaptation due to conditions in the desert, list some features.Short, fat trunks that act as reservoirs.
Fire resistant.
Roots grow 50m into the ground and grow out side ways to find water. - 9Cacti are an adaptation due to conditions in the desert, list some features.Can live up to 175 years.
Succulents.
Store water in their tissue.
Saguaro cactus can grow up to 15m tall.
Spikes detect predators.
Lateral shallow root system to collect water before evaporation.
Stems store water. - 10Flowering plants (Ephemeral species) are an adaptation due to conditions in the desert, list some features.Seeds that only germinate after heavy rainfall.
Can complete a full life cycle in 1 month.
Have brightly coloured flowers. - 11Lichen are an adaptation due to conditions in the desert, list some features.Flaky crust on rocks.
Dont need soil.
Can grow in high temperatures.
Breaks down rocks chemically. - 12Kangaroo rats are an adaptation due to conditions in the desert, list some features.Dont need to drink water to survive as they get it from food.
Live in burrows to avoid direct sunlight.
They dont perspire.
Produce very little urine. - 13Desert foxes are an adaptation due to conditions in the desert, list some features.Light fur protects their bodies as it reflects and keeps them cool.
Large ears aid heat loss.
Thick fur on the bottom of their feet to stop them from burning. - 14Where in the Western Desert located on a global scale?Northern hemisphere, South west of North America.
- 15Where in the Western Desert located on a national scale?California, Nevada, Utah, Wyoming, Colorado, New Mexico.
- 16Tree planting is the solution, what are the causes?Removal of fuel wood, Soil erosion.
- 17Water and soil management is the solution, what are the causes?Population growth, Overgrazing, Over cultivation.
- 18Use of appropriate technology is the solution, what are the causes?Climate change.
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- GCSE Geography (Paper 1) Flashcards on B - Hot deserts, created by David Ellis on 15/05/2019.
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