LandScapes & Landform Flashcards
how does a desert occur
Deserts occur when the evaporation is greater than the precipitation or when there is less than 250 ml a year
How much does deserts cover earth’s surface?
All types of deserts cover 30% of the earth’s surface.
All types = Cold and Hot deserts.
What is an extremely arid desert
No precipitation for 12 consecutive months
What is an arid desert
Less than 250 mm of precipitation per year
What is a semi arid desert
Between 250 mm to 500 mm of precipitation per year
name the temperature range in a dry desert in a 24-hour period
45 to -15 degrees
Where are deserts located
Western sides of continents and In the interior of continents
Why does deserts occur in Interior continents
Winds blowing over continents are dry by the time they get to the interior of continents.
why do deserts occur on the western sides of continents
western ocean currents strip the wind of its moisture and are dry by the time they reach the land
why are depressions/basins or leeward sides dry
the highlands around the basin stop rain from passing, leaving a rainshadow.
Other than Antarctica, what is the driest continent in the world
Australia is the driest continent due to only 35% of the continent receives so little rain that over 70% is classified as desert
You can call sandy desert, an
erg surface
You can call stony desert, an
reg surface
You can call rocky desert, an
hamada surface
Why is the air around cold ocean currents off the west have low moisture
the evaporation from cold water in the current is low
