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* Geography
* Solstice: the exact moment when summer and winter starts
* Equinox: the beginning of spring and autumn
* Tectonic plates: earth crust is divided into sections calledtectonic plates
* Continental drift: moves of continents
* Plain: a level area
* Plateau: a plain that sits high above sea level and usually have a cliff on all sites
* Continentalshelf: the edge of a continent often extend out under the water
* Erosion: is the proses by which rocks and soil slowly break apart are swept away
* Ring of fire: is a circle of volcanoes andearthquakes along the rim, or outer edge of the Pacific Ocean
* Earthquake: a violent shaking of the earth crust
* Tsunamis: large powerful waves that can cause great destruction
*Volcano: a mountain that erupts in an explosion of molten rock, gases and ash
* Evaporation: the sun hits the ocean and the water vapor rises up into the atmosphere
* Condensation: coolertemperatures change vapor into droplets
* Precipitation: the water droplets grow heavier and fall back to the earth in rain or snow
* Climate: is the average condition of the atmosphere over a longperiod of time. It is predictable
* Weather: is the average condition of the atmosphere in a particular time. It is not predictable
* Vegetation: plant life
* Hurricane: strong stormwith swirling winds and heavy rainfall
* Cyclone: a storm with rotating winds
* Tornado: small storm than a cyclone but more powerful winds
* Raw materials: materials used to makeproducts
* Nonrenewable resources: resources that are limited and cannot be replaced
* Renewable resources: never run out or a new supply develops over time
* Habitat: a natural environmentof plants or animals
* Ecosystem: a community of plants and animals and their habitat
* Restored: brought back
* Marine life: plants and animals of the ocean
* Culture: is how...