Earthquakes and Seismic Waves
Physics ⇒ Earth and Space Physics
Earthquakes and Seismic Waves starts at 7 and continues till grade 12.
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See sample questions for grade 10
A city is located 100 km from the epicenter of an earthquake. If the P-wave speed is 5 km/s, how long will it take for the P-wave to reach the city?
A seismogram shows that the S-wave arrived 40 seconds after the P-wave. If the P-wave speed is 8 km/s and the S-wave speed is 4 km/s, how far is the station from the epicenter?
Describe the main difference between P-waves and S-waves in terms of their movement and the materials they can travel through.
Describe what happens to the amplitude of seismic waves as they move away from the epicenter.
Describe what is meant by 'seismic shadow zone' and explain why it occurs.
Describe what is meant by the term 'aftershock'.
Explain how scientists use the difference in arrival times of P-waves and S-waves to locate the epicenter of an earthquake.
Explain the difference between magnitude and intensity in the context of earthquakes.
Explain why earthquakes are more likely to occur at plate boundaries.
Explain why S-waves do not travel through the Earth's outer core.
If a P-wave travels at 6 km/s and an S-wave at 3.5 km/s, how much sooner will the P-wave arrive at a station 210 km from the epicenter?
What is the point inside the Earth where an earthquake originates called?
