click below
click below
Normal Size Small Size show me how
Dynamic Planet #1
8th Grade Science
Term | Definition |
---|---|
Geosphere | made of the crust, mantle and inner and outer core |
Atmosphere | made of the mixture of gases that surround the planet |
Biosphere | made of all living things, including plants, animals and other organisms |
Hydrosphere | the planet's water, including oceans, lakes rivers, ground water, ice and water vapor |
physical model | structure scientists builds to represent something |
Conceptual Model | Model scientists develop in their minds |
Mathematical Model | Mathematical equations that describe how process works |
Numerical Model | Mathematical model that is tested in a computer |
Seismic wave | vibrations caused by an earthquake |
S-Wave | a/k/a Shear or secondary wave. Travels side by side, only goes through solids -- slow |
P-Wave | a/k/a Compression or primary wave. Travels in a straight line, goes through liquids, solids, gases, fast |
Surface wave | moves along surface not interior; causes the most damage; slowest |
Refraction | when passes through one medium to another changes in direction due to change in velocity |
Focus | Earthquake the point underground where the rocks first start moving |
Epicenter | Located directly above the Focus |
Seismograph | Instrument that detects, magnifies and records seismic waves |
Shadow Waves | Area where no waves are detected |