| A | B |
|---|
| Theory | The most logical explanation for something |
| Scientific Method | Systematic approach to solving a scientific problem |
| hypothesis | proposed solution to a problem |
| gram | basic unit for mass |
| supernova | tremendous explosion that breaks a star apart |
| equator | imaginary line that divides the earth into northern and southern hemispheres |
| hemisphere | top or bottom half of the earth |
| lithosphere | portion of earth covered by land |
| hydrosphere | portion of earth covered by water |
| atmosphere | envelope of gasses that surrounds the earth |
| crest | highest point of a wave |
| trough | lowest point of a wave |
| tsunami | giant wave caused by an earth quake |
| island | landmass completely surrounded by water |
| elevation | height above sea level |
| latitude | distance north and south of the equator |
| moho | boundary between the crust and the mantle |
| magma | molten rock beneath earth's surface |
| fault | crack along which rocks move |
| fold | bend in a rock without it breaking |
| dome | raised area shaped like the top half of a sphere formed from the pressure of rising magma |
| earthquake | sudden trembling and shaking of earth's crust |
| focus | underground origin of an earthquake |
| epicenter | point on the surface directly above |
| green house effect | process of trapping heat in the atmosphere |
| barometer | instrument used to measure air pressure |
| evaporation | process of putting water back into the atmosphere |
| precipitation | water that falls back to earth |
| front | boundary where two air masses meet |
