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Questions and Answers
An earthquake is caused by a gradual buildup of energy without any sudden release.
An earthquake is caused by a gradual buildup of energy without any sudden release.
False (B)
The point on the Earth's surface directly above the hypocenter is known as the epicenter.
The point on the Earth's surface directly above the hypocenter is known as the epicenter.
True (A)
Tectonic plates move at rates of around several meters per year.
Tectonic plates move at rates of around several meters per year.
False (B)
The strength of the rocks along a fault line determines whether an earthquake will occur.
The strength of the rocks along a fault line determines whether an earthquake will occur.
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Seismic waves are created only when two tectonic plates collide.
Seismic waves are created only when two tectonic plates collide.
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Study Notes
Earthquake Basics
- Earthquakes are sudden energy releases in Earth's crust, creating seismic waves.
- This release occurs typically along fault lines, breaks in the Earth's crust where tectonic plates meet.
- Tectonic plate movement is due to Earth's internal heat, causing slow shifts.
- Plate interactions (sliding, colliding, separating) build stress along fault lines.
- Stress exceeding rock strength causes sudden rupture, triggering an earthquake.
Earthquake Anatomy
- Hypocenter (focus): The underground point of rupture.
- Epicenter: The surface point directly above the hypocenter.
- Seismic waves radiate outward from the hypocenter, shaking the ground.
Tectonic Plates and Earthquakes
- Earth's crust is divided into tectonic plates.
- Plates are in constant, slow motion (a few centimeters per year).
- Friction along fault lines obstructs plate movement, accumulating energy.
- Released energy results in earthquakes.
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Description
This quiz explores the fundamental concepts of earthquakes, including their causes and anatomy. Understand the roles of tectonic plates and how stress along fault lines leads to seismic activity. Test your knowledge on essential terms like hypocenter and epicenter.
