Earth hazards Flashcards
What is the definition of an earthquake?
An earthquake is the shaking of the surface of the Earth resulting from a sudden release of energy in the Earth’s lithosphere that creates seismic waves.
True or False: Earthquakes are caused by the movement of tectonic plates.
True
What is the Richter scale used to measure?
The magnitude of earthquakes.
What is the focus of an earthquake?
The point within the Earth where the earthquake starts.
What is the epicenter of an earthquake?
The point on the Earth’s surface directly above the focus of an earthquake.
What is the definition of a tsunami?
A series of ocean waves caused by an underwater earthquake, volcanic eruption, or landslide.
What is the primary cause of a tsunami?
Underwater earthquakes.
What is the definition of a landslide?
The movement of rock, earth, or debris down a slope.
What factors can contribute to a landslide?
Heavy rainfall, earthquakes, volcanic eruptions, and human activities.
What is the definition of a volcanic eruption?
The ejection of magma, gases, and ash from a volcano.
What is the primary cause of a volcanic eruption?
The buildup of pressure beneath the Earth’s crust.
What are the impacts of a drought?
Crop failures, water shortages, and ecosystem damage.
