Chapter 7 Vocabulary
This is my sixth grade science vocab with MRs. SEAL
Terms
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- San Andreas Fault
- An area in California where the Pacific Plate and the North American Plate slide past each other with jerks and jolts, frequently causing earthquakes
- P Waves
- The fastest type of seismic waves; can travel through solids, liquids, and gases; also known as pressure waves and primary waves,
- S Waves
- The second-fastest type of seismic waves, cannot travel through materials that are completely liquid; also known as shear waves and secondary waves.
- seismograph
- An instrument located at or near the surface of the Earth that records seismic waves
- Gap Hypothesis
- This states that sections of active faults that have had relatively few earthquakes are likely to be the sites of strong earthquakes in the future
- seismogram
- The tracing of Earthquake motion created on paper by a seismograph
- Moho
- a place within earth where the speed of seismic waves increases sharply. This makes the boundary between the crust and the mantle.
- Earthquake Hazard
- This measures how prone an area is to experiencing earthquakes in the future. It is determined by past and present seismic activity
- Focus
- the point inside the Earth where an Earthquake begins
- Seismic Gaps
- The areas along a fault where relatively few earthquakes have occured
- seismologist
- scientist that studies earthquakes
- Deformation
- The change in the shape of rock in response to stress. Two types: plastic and elastic
- Seismic Waves
- Waves of energy that travel through Earth. Two types are body and surface
- Elastic Rebound
- a sudden return of elastically deformed rock to its original shape. During this, rock releases energy that causes Earthquakes.
- Epicenter
- the point on the Earth's surface directly above an Earthquake's starting point
- Love Waves
- Seismic waves that reach the surface last (slowest). They cause the most damage.
- Seismology
- the study of earthquakes
- Richter Scale
- This is commonly used to measure earthquake strength
- Shadow Zone
- an area on the Earth's surface where no direct seismic waves from a particular earthquake can be detected. This discovery suggests that the Earth has a liquid core.
- Rayleigh Waves
- Seismic waves that reach the surface with up and down movement