2. wind – air that moves horizontally

3. convection cell – a pattern of rising and falling air, sinking air, and winds caused by unequal heating and cooling of the air

6. sea breeze – a wind that blows from the sea toward the land

8. land breeze – a wind that blows from the land toward the sea

9. sea breezes vs. land breezes

10. Coriolis effect – no matter which way the wind blows, it will always pull toward the right in the northern hemisphere, and to the left in southern hemisphere.

12. isobar – a line on a map connecting places with equal air pressure

13. hygrometer - an instrument that measures relative humidity.

14. thermometer - an instrument that measures temperature

15. rain gauge - an instrument that measures temperature

16. weather vane- an instrument that wind direction

17. anemometer - an instrument that measures wind SPEED

18. barometer - an instrument that measures air pressure

19. low pressure system- a weather system that usually brings rainy weather.

20. high pressure system – a weather system that brings fair weather.

21. El Nino - an abnormal warming of surface ocean waters in the eastern tropical Pacific, is one part of what's called the Southern Oscillation. http://kids.eart h.nasa.gov/ar chive/nino/intr o.html http://education.nationalgeogr aphic.com/edu cation/encyclo pedia/el- nino/?ar_a=1

22. El Nino - an abnormal warming of surface ocean waters in the eastern tropical Pacific, is one part of what's called the Southern Oscillation. http://www.srh.noaa.gov/jetst ream/tropics/e nso_impacts.h tm http://education.nationalgeogr aphic.com/edu cation/encyclo pedia/el- nino/?ar_a=1

23. La Nina - an irregularly occurring movement of deep cold water to the ocean surface along the western coast of South America that often occurs after an El Niño and that disrupts weather patterns especially in a manner opposite that of an El Niño http://education.nationalgeogr aphic.com/edu cation/encyclo pedia/la- nina/?ar_a=1

24. Jet Stream - a long narrow wandering current of high- speed winds blowing from a generally westerly direction several miles above the earth's surface http://education.nationalgeogr aphic.com/edu cation/encyclo pedia/jet- stream/?ar_a= 1

25. Gulf Stream - warm current of the Atlantic Ocean flowing from Gulf of Mexico NE along coast of U.S. to Nantucket Island and from there eastward http://education.nationalgeogr aphic.com/edu cation/encyclo pedia/jet- stream/?ar_a= 1