Atmosphere Warming Notes!
1. Our planet is surrounded by a thin layer of gases called the atmosphere, it holds water vapor that influences our weather and serves as a protective blanket from the dangerous rays of the sun.
2. 78% nitrogen and 21% oxygen. The two main gases in our atmosphere.
3. The troposphere is the lowest or bottom layer, is where we live and where ALL weather takes place.
4. air has mass (weight), it causes pressure.
5. air in the atmosphere is pressing down all over Earth causing pressure
6. wind is caused by a difference in air pressure
7. only about 50% of the Sun's energy is absorbed by the Earth's surface.
8. Radiation is energy that is transferred as rays or waves, radiation is absorbed by the ground, buildings, trees, oceans, you, and anything else it may strike.
9. sunlight is just pounding into the ground where it is changing into heat and warming up the ground.
10. When the air touches the warm ground, the air starts to warm up through conduction.
11. Hot air RISES!!!
12. As the warm air rises up through the atmosphere, it touches more air and helps to heat it up. This is convection.
13. Convection is the process of heat moving through a gas or liquid.
14. when the air is heated by the Earth, it starts to rise.
15. As heated air rises, cooler air sinks down below it where it gets heated and also begins to rise.
16. Heated air gains energy, the molecules start moving faster which makes them move farther apart, making the air less dense, which causes it to rise.
17. air rises, it begins to cool, losing energy the molecules begin moving slower causes them to get closer together the denser the air becomes. Dense cold air is heavier than warm air, so cold air sinks.
18. Wind is moving air.
19. The letter "L" represents areas of warm air and the "H" represents areas of colder air.
20. Warm air rises because it weighs Less and cold air sinks because it is Heavier. So when you see the "L" think weighs less and when you see the "H", think heavier
21. Longer days mean more sunshine, which means more radiation striking the ground making it warmer and warmer. Warmer ground means warmer air, means warmer weather. The tilt of the Earth affects the amount of radiation that strikes the Earth.