Chapter+Three+Terms

Lydia Grommish: __Smog__- Smoke or other atmospheric pollutants combined with fog in an unhealthy or irritation mixture. Smog is usually associated with big cities. __Hypothesis__- A proposition set forth to be tested and proved so it will eventually become a theory. Most scientists make a hypothesis before they even start testing. __Permafrost__-Perennially frozen subsoil. Tundra has permafrost. __Prairie__- A tract of grassland usually called a meadow. North Dakota is a prairie. __Deciduous__- The shedding of leaves annually. Most trees in North Dakota are deciduous. __Coniferous__- Are trees that have cones. Pine trees are coniferous. __Oasis-__ It is an area of lush vegitation in a desert caused by underground water. In The Mummy, the characters come accross a oasis. __Natural Vegetation__- The plant life that grows in an area where the natural enviroment is unchanged by human activity. Natural vegetation is rare in north america.

__Greenhouse Effe__ct- the capacity of certain gases in the atmosphere to trap heat, thereby warming the earth. //the greenhouse effect controls the atmosphere// __Solstice__ - one of the two days, the sun rays strike directly on the tropic of cancer or tropic of capricorn, marking the beginning of summer or winter. // the solstice has a very big effect on the weather. // __Equinox__ - one of the two days, which the sun is directly above the equator , making it day and night equal in length. //on my birthday, it will be an equniox.// __Revolution__ - the earths yearly trip around the sun, taking 365 1/2 days. // The earth revolves around the sun. // __Rotation__ - when the eath turns a whole 360 degrees // ﻿The earth rotates a whole 360 around the sun. // __Axis__ - an imaginary line that runs through the center of the earth between the north and south. // the earth turns on the axis. // __Climate__ - weather patterns typical for an over along period of time. // Climate is the way weather tags along in nature. // __Weather__ - condition of the atmosphere in one place during a short period of time. // weather is the way our earth grows, destroys and reproduces our supplies. // __﻿__** __Windward-__ The side of a mountain range facing the wind, the windward is so strong today, **
 * __ El Nino __- is the periodic change in the pattern or ocean currents, water temperature, and the weather in the mid-pacific region. El nino is important to metrologists. **
 * __Currents__-just as wind patterns movem cold,warm, and streams of water. the current are really fast and strong today. **
 * __Prevailing Winds__- global winds blow fairly constant patterns, the prevailing winds are blowing west. **
 * __Low Latitudes__- between 30 S and 30 N latitude is a zone. South america is in the low latitude. **
 * __Middle Latitudes__-the most variable weather on earth. the middle latitudes are europe and north america. **
 * __High Latitudes__- 60 N amd 90N are the high latitudes. the high latitudes is the north pole. **
 * __Global Warming__-is believed to be caused in part by human activities, Global warming is killing our earth. **