1. The Earth’s Crust Earthquakes
Sunday, October 14, 2018Sunday, October 14, 2018

2. An earthquake starts when two plates slide or slip past each other along a fault line.
*Fault line – the boundary line between two tectonic plates

3. Seismologists use special machines called seismographs to record earthquakes.
Seismologist – a scientist who studies earthquakes

4. Seismograph – a machine used to measure the strength of earthquakes

5. Earthquake Generator

6. The seismograph (seismometer) must be attached to solid bedrock in order to feel the vibration from a quake.

7. Seismogram – the piece of paper in the seismograph that records the earthquakes

8. Seismologists use the Richter Scale to describe the magnitude (the strength) of an earthquake by measuring the seismic waves (earthquake waves) or aftershocks (smaller earthquakes that happen after the first)

10. Which building was built to better safety codes, A or B?

11. This railway line
used to be straight.
Unfortunately, it was
built along a fault
line and was twisted
during a quake.

12. This fence used to
be in a straight line
as well.
During the earthquake,
one plate went one
way…
…and one plate went
the other,
ripping this fence in
two.

13. Building to defeat earthquakes
Which of these two models is designed to survive an earthquake, A or B? What is the difference between the two? Look carefully

14. Building to defeat earthquakes
Which of these two models is designed to survive an earthquake, A or B? What is the difference between the two?

15. “Springs”