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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Describe how scientists use seismic waves to determine the structure of the Earth's interior.
Describe the difference between the epicenter and the focus of an earthquake.
Describe the main factors that affect the amount of damage caused by an earthquake.
Explain the difference between magnitude and intensity in the context of earthquakes.
Explain what is meant by the term 'aftershock'.
Explain why earthquakes are more likely to occur at transform plate boundaries.
A seismograph at Station A records a P-wave arrival at 10:00:00 and an S-wave arrival at 10:02:00. If the P-wave velocity is 8 km/s and the S-wave velocity is 4.5 km/s, estimate the distance from Station A to the earthquake epicenter.
A seismograph records the following arrival times for an earthquake: P-wave at 12:00:00, S-wave at 12:01:30. If the P-wave velocity is 7 km/s and the S-wave velocity is 4 km/s, calculate the distance to the epicenter.
Which of the following best describes a surface wave? (1) Travels only through the Earth's interior (2) Travels along the Earth's surface (3) Is the fastest seismic wave (4) Cannot be detected by seismographs
Which of the following is a correct statement about Rayleigh waves? (1) They move the ground in a rolling motion (2) They are the fastest seismic waves (3) They only travel through liquids (4) They are body waves
Which of the following is NOT a type of seismic wave? (1) P-wave (2) S-wave (3) T-wave (4) Love wave
Which of the following statements about P-waves is correct? (1) They are slower than S-waves (2) They can travel through solids, liquids, and gases (3) They are surface waves (4) They cause the most damage
Fill in the blank: The boundary between two tectonic plates is called a ________.
Fill in the blank: The process of determining the location of an earthquake's epicenter using data from three or more seismograph stations is called ________.
Seismic waves are detected and recorded by an instrument called a ________.
The ________ scale measures the effects and damage caused by an earthquake.
True or False: All earthquakes are caused by tectonic activity.
True or False: Seismic waves can be used to locate the epicenter of an earthquake.
True or False: S-waves can travel through both solids and liquids.
True or False: The intensity of an earthquake is always the same as its magnitude.
