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D - Science - Unit 6

Winds - Part 1

QuestionAnswer
What causes wind and air to move? differences in air pressure
What causes most differences in air pressure? the unequal heating of the atmosphere
As air becomes less dense, what happens to the air pressure? it decreases
What happens to the air above a less-heated area? it is cooler and denser
When cool, dense air with a higher pressure flows underneath the warm, less dense air what happens? it forces the warm air to rise
What 2 things are winds described by? their direction & speed
How is wind direction determined? by a wind vane
Which way does a south wind blow? from the south towards the north
Which way does a north wind blow? from the north towards the south
What causes local and global winds? the unequal heating of Earth's surface
When do local winds form? only when large-scale winds are weak
What causes a sea breeze? cool air blowing inland from over the water that moves underneath the warm air
During the day, as the land heats up faster than the water, what happens to the air? the air over the land becomes warmer than the air over the water
At night, as the land cools down faster than the water, what happens to the air? the air over the land becomes cooler than the air over the water
What type of breeze occurs when warm land air rises and cooler water air moves beneath the lands warm air? sea breeze
What type of breeze occurs when warm water air rises and cooler land air moves beneath the waters warm air? land breeze
What type of winds occur over a small area? local winds
What type of winds occur over a large area? global winds
What do temperature differences between the equator and the poles produce? giant convection currents in the atmosphere
When warm air rises at the equator, what happens to the air at the poles? the cold air sinks
Because of global convection currents, what happens to air pressure near the equator? lower air pressure
Because of global convection currents, what happens to air pressure near the poles? higher air pressure
Created by: lprinke