Social Studies (7th gr.)Our world Today Chap.2
Terms
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- Geograpy
- Study of the earth in all its variety land, water , plants, and animals
- Landform
- individual feature of the land, such as a mountain or valley
- Region
- area that shares common characterisitcs
- Global Positioning system
- Group of satalites that travels around the earth; which can be used to pin point an exact location
- Geographic Information Systems
- Special software that helps geographers gather and use different kinds of information about a place
- Plate Tectonics
- theory that the earth's crust is not an unbroken shell but consists of plates or huge slabs of rock that move
- Fault
- crack in the earth's crust
- Plain
- low-lying stretch of flat or gently rolling land
- environment
- natural surroundings
- plateau
- flat land with higher elevation than a plain
- canyon
- deep narrow valley with steep sides which a river has cut through a plateau
- aquifer
- underground rock layer that stores large amounts of water
- climate
- usual predictabel patter of weather in an area over a long period of time
- tropics
- low-latitudes region between the tropic of cancer and the tropic of capricorn
- greehouse effect
- buildup of certain gasses in the atmosphere that like a greenhouse prevent the warm air from escaping into the atmoshere, resulting in increase of the earths temperature
- conservation
- careful use of resourses so they are not wasted
- pesticide
- powerful chemical that kills crop destroying insects
- ecosystem
- place where the plants and animals are dependent upon one another and their surroundings for survival
- crop rotation
- varing what is planted in a field to avoid using up all the minerals in the soil
- erosion
- process of moving water and wind across the earth's surface, leaving land less furtile than before
- deforestation
- widespread cutting of forests
- acid rain
- rain containing high amounts of chemical pollutants