p1 topic 4
- Created by: evedyer72
- Created on: 07-12-16 14:11
View mindmap
- P1
- Topic 4
- Infra sound- longitudinal wave with a frequency of less than 20Hz/ lower than the human hearing range.
- Ultra sound- Longitudinal wave with a frequency above 20,000 Hz/ higher than the human hearing range.
- When tectonic plates move past or towards each other they may become locked together. Eventually , the build up becomes so large that the plates suddenly move. The resulting energy release is an earthquake.
- P- waves: longitudinal, faster S-waves: transverse, slower.
- Density changes cause the speed of seismic rocks to change.
- s- waves cannot travel through the liquid outer core.
- Topic 4
Comments
No comments have yet been made