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Seismic waves 7

Lesson 11 Seismic Waves, Richter Scale

QuestionAnswer
What information is recorded on the seismogram? Waves! Seismic waves.
What are seismic waves? waves produced when the earth's plates release energy (earthquake).
Can we SEE seismic waves? No we can't, we can see the effect on the surroundings like damage to buildings or cracks in the ground.
Name the 2 types of seismic waves. Body and surface waves.
P waves and S waves are examples of which type of seismic wave? Body waves.
Name 1 example of a surface wave. L (love) waves.
Which waves are the smallest on a seismogram? P waves.
Which waves are the fastest? P waves.
Which waves cause the MOST Damage? L waves.
P stands for... Primary
S stands for... Secondary
Name 3 main facts about P waves. a) 1st wave b) fastest wave c) can travel through solids and liquids and gas
Name 3 main facts about S waves. a) second wave recorded after P wave b) can move through solids c) they are the 2nd fastest wave d) can move up and down or side to side like snake
Name 3 main facts about L waves. a) travel along the surface of the earth b) they are the slowest waves c) they cause the most damage
What did we use in class to demonstrate P and S waves? (hint: it was long and springy) A coil or Slinky
Can S waves travel through liquids? No they can't. Only solids.
Do P waves travel through the Earth? Yes they do. An earthquake on 1 place on the earth's crust may not be felt on the other side of the earth but the P waves will be recorded on a seismogram on other side of earth.
What is the scale called that measures observable destruction/changes to the surroundings during an earthquake? Mercali scale
Explain 1 piece of technology that we can use to measure the earth's movement. Seismographs. They are located deep in the earth on the bedrock and the data is recorded above ground on a seismogram.
Describe observable differences between a magnitude 2.5 earthquake and a magnitude 7.0 earthquake. In a 2.5 earthquake you will see hanging objects swing back and forth. In a 7.0 earthquake you will see broken pipes, cracks in ground and buildings moved off their foundations.
Created by: msmacc
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