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Section 2.1

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  1. Section 2.1 Air pressure a. Is the force exerted by moving air molecules b. Measures the speed of wind. c. Only pushes on objects in one direction. d. Is the same as density.

  2. Section 2.1 Air pressure increases • as density decreases b. as you move higher in the atmosphere c. as altitude increases d. as you move lower in the atmosphere

  3. Section 2.1 Air moves because air pressure • remains constant with altitude • varies from place to place c. is higher in cold air d. is lower at sea level

  4. Section 2.1 Which of these tools is used to measure air pressure? • thermometer • kilometer • barometer • speedometer

  5. Section 2.1 Over short distances, air moves • from low pressure to high pressure • from high pressure to low pressure • only between areas of low pressure • only between areas of high pressure

  6. Section 2.1 How is air density related to air pressure?

  7. Section 2.1 What could cause your eardrum to make a popping sound as you ride up a tall building in the elevator?

  8. Section 2.2 Test Questions

  9. A time of heavy rains, the most extreme occur in South and Southeast Asia • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  10. The influence of Earth’s rotation on global winds • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  11. These winds blow from the east and cause storms when they meet the westerlies • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  12. These winds blow from the west and usually bring storms across the U.S. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  13. Quickly moving winds that flow in the upper troposphere • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  14. Large masses of moving air caused by uneven heating between the equator and the poles. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  15. ←Horizontal→ movement of air • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  16. Atmosphere conditions at a particular time and place. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  17. An area of high pressure found 30⁰ North or South of the equator where the weather is clear and dry. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  18. A stream of air that pulls cold air down from Canada and warm air up to Canada. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  19. Strong, steady winds that die out as they come near the equator. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  20. An area where the land is cooler than the sea and the weather is cool and dry. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  21. A low pressure zone near the equator that produces clouds, heavy rain and tropical storms. • Coriolis effect • Global winds • Jet streams • Winter monsoon • Summer monsoon • Weather • Wind • Doldrums • Trade winds • Westerlies • Horse latitudes • Easterlies • Polar jet stream

  22. How does uneven heating of Earth’s surface cause winds to flow? Uneven heating causes differences in air pressure, which cause air to move.

  23. How does Earth’s rotation influence the movement of global winds? Earth’s rotation causes global winds to curve.

  24. Section 2.3 Test Questions

  25. A liquid changes into a gas during _______. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  26. _______ is a cloud that rests on the ground or on a body of water. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  27. _______ of water takes place when the rate of evaporation equals the rate of condensation. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  28. When a gas changes to a liquid, _____ takes place. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  29. Water that falls to Earth’s surface is known as ________. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  30. The amount of water vapor in the air is ___________. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  31. ________ decreases as air heats up and increases as air cools. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  32. The temperature at which air reaches saturation is the ___________. Condensation Dew point Evaporation Fog Humidity Precipitation Relative humidity saturation

  33. a. Cumulus b. cirrus c. stratus 1. Forms in layers when air cools over a large area C 2. Forms in very cold air high altitudes B 3. Are seen during day time during fair weather and are fluffy puffs of cotton. A

  34. a. Cumulus b. cirrus c. stratus 4. Usually have a wispy or feathery appearance B 5. Can be so dark that they block out the sun C 6. Can become tall clouds that produce thunderstorms A

  35. a. Cumulus b. cirrus c. stratus • can cause an appearance of a circle of light around the sun or moon C • Contrails are a type of this cloud B 9. Produces steady light precipitation C

  36. Label the following steps of cloud formation in the correct order. Water vapor condenses onto dust particles. 4 The cooled air reaches saturation. 3 Tiny droplets or ice crystals form. 5 Warm air rises in the atmosphere. 1 Warm air cools to its dew point. 2

  37. Section 2.4 Test Questions

  38. Precipitation that forms from ice crystals that merge in clouds is • Sleet • Freezing rain • Hail • snow

  39. Precipitation forms when water droplets • evaporate, freeze into ice crystals, and rise in the air • Combine and become heavy enough to fall to Earth’s surface • Condense, freeze into ice crystals, and rise higher in the air • Stick to the ice crystals and melt them as they fall to Earth’s surface

  40. Rain that freezes when it hits the ground or other surfaces is • sleet • Snow • freezing rain d. hail

  41. Acid rain • Is less acidic than normal rain • Helps trees grow • May fall far from the source of pollution • Falls only from cumulus clouds

  42. Large pellets of ice that are tossed up and down in storms clouds fall to the Earth as • Snow • Sleet • Hail • Rain

  43. How many water droplets does it take to make a rain drop? • 1,000 • 10,000 • 100,000 • 1,000,000

  44. Rainfall is measured with • a rain gauge • an anemometer • a thermometer • barometer

  45. This type of rain harms trees, bodies of water and surfaces of buildings and sculptures • Snow • Sleet • Acid rain • hail

  46. Rain that freezes into ice pellets while falling through cold air is • Sleet • Freezing rain • Snow • hail

  47. Snow depth is measured with a • Rain gauge • Ruler • Stick • Dopplar Radar