| A | B |
|---|
| Air Mass | a large body of air with the same temperature and moisture conditions as the area over which it formed |
| Asteroid | a large piece of space rock, mostly found in a zone between Mars and Jupiter |
| Atmosphere | the layer of air which surrounds and protects the earth - divided into five layers |
| Condensation | water vapor molecules in the air condensing on the nearest surface and producing tiny droplets |
| Convection Current | the movement of air caused by the density differences in hot and cold air Convection current is the pattern of hotter material rising and cooler air sinking. |
| Deposition | eroded material is carried away and dropped in another place |
| Erosion | a process that wears away Earth’s materials and takes them to another place |
| Fossil | the remains, imprints, or traces of prehistoric organisms |
| Galaxy | a large group of stars, dust, and gas held together by gravity |
| Global Winds | the large scale wind patterns on Earth (trade winds, westerlies, polar easterlies, doldrums) |
| Igneous Rock | formed when molten rock called magma cools and hardens |
| Lithosphere | rigid layer of earth about 100km thick made of crust and part of the upper mantle |
| Metamorphic Rock | Forms when heat, pressure, or fluids act on igneous, sedimentary, or other metamorphic rock and affect its form or composition, or both |
| Meteor | A meteoroid that burns up in Earth’s atmosphere |
| Mineral | Naturally occurring inorganic solid that has a definite chemical composition and an orderly internal atomic structure. |
| Moon Phases | Change in appearance of the Moon as viewed from Earth, due to the relative positions of the Moon, Earth, and the Sun |
| Plate Tectonics | Theory that the Earth’s crust and mantle are broken into plates and float and move around on a plastic like layer of the mantle |
| Renewable Resource | Resources that can be replaced within a relatively short period of time. |
| Sedimentary Rock | Rock formed when sediments are compacted and cemented together or when minerals come out of a solution |
| Soil Profile | Vertical section of soil layers, each of which is a horizon containing different materials than the horizon before it. |
| Tides | Daily rise and fall in sea level caused, for the most part, by the interaction of gravity in the Earth-Moon system |
| Weathering | Mechanical or chemical surface processes that break rocks into smaller and smaller pieces |
| Eclipse | When the shadow of one celestial body falls on another; Solar eclipse- moons shadow falls on the Earth; Lunar eclipse- Earth’s shadow falls on the moon |
