17 The WindMoving air- caused by differences in air pressure when the atmosphere is warmed by the sun.The greater the pressure difference the faster the wind moves.17
18 Sea and Land Breeze During the day: Air over ocean is cooler….Air over land warmer. Warm air rises and moves toward the ocean.During the night:Air over ocean is warmer…Air over land is cooler.Warm air rises and moves toward land.
19 Reality Check Can I recognize events caused by heat convection? How is the sun’s energy and wind connected?
20 Warm air rises at the equator and sinks at the poles because more solar energy is received at the equator.The sun’s energy creates pressures differences in the Earth’s atmosphere. As high pressure areas are created around the poles, cold polar air (wind) will flow toward the equator causing the wind.HL
25 1. What happens to majority of the sun’s energy that reaches the Earth’s atmosphere? It is absorbed by the land and oceansIt is reflected by the clouds and airIt is absorbed by the ozone layerIt is reflected by the Earth’s surface
26 2.Which best describes the wind? Essential the water cycleMoving airStatic air near the ocean’s surfaceA difference in air temperature
27 3. Why does warm air rise and cold air sink? Because warm air is less dense than cold air.Because cold air is less dense than warm airBecause warm air is denser than cold airBecause warm air has less pressure than cold air
28 4. Convection is the method by which most _____energy circulates in the atmosphere. ThermalNuclearKineticPotential
29 5. Air is warmer and less dense around the equator because the equator receives more _____. Air pressureWindSolar energyGreen house gas
30 6. When the atmosphere is warmed by the sun, changes in air pressure results in the ______. WindCloudsHumidityPrecipitation
31 7. What causes the air rising from the land to be warm? Heat from the sunHeat from ElectricityHeat from a hot springHeat from decomposition
32 8. The following happens the atmosphere: Solar Energy---Warm air rises----air cools in upper atmosphere and sinks---air currentsThis process can be described asWind formation (through heat convection)Cloud formation