Topic 1 - Hazardous Earth Flashcards
What is the role of wind and why it’s role important
The way the sun faces the earth the rays are more concentrated at the equator making a hotter and more dispersed the further north or south u go making those places get gradually colder . The wind helps redistribute heat making the earth more habitable
What are the air movements that redistribute heat called
Pressure differences and ocean currents
About pressure differences between land and sea
Land and sea heat up differently .
On land dark surfaces like soil absorb sunlight which is then converted to heat
Land heats quick in summer but only at the surface so it cools quickly in winter . When it heats it also heats the air above r it causing the aid to expand so it becomes lighter and rises. This forms areas of low pressure over large landmasses in summer .
The sea behaves different . Opposite to land some of the sunlight is reflected however the sunlight that is absorbed goes up to 30m in depth. It therefor takes the sea longer to heat but also longer to cool . In summer air over the sea remains cooler and denser , forming areas of high pressure.
Differences in pressure causes air to move from high to pressure, cresting wind. It moves in a circular way because of the earths rotation.
