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Natural Disaster
A natural event that causes great destruction and damage to property and loss of life.
Earthquake
A sudden shaking or tremor of the Earth caused by movements or vibrations inside the Earth.
Seismometer
An instrument that detects vibrations caused by an earthquake and produces a pattern on a paper called a seismogram.
Richter Scale
A scale used to measure the magnitude of earthquakes.
Volcano
An opening in the Earth's surface that allows hot molten rocks, ash, and gases to escape.
Magma
Hot molten material beneath the Earth's surface that can give rise to igneous rocks.
Tremor
A small or weak earthquake.
Crust
The outermost layer of the Earth.
Mantle
The layer beneath the Earth's crust, made up of hot rocks.
Core
The innermost layer of the Earth, consisting of hot, molten material.
Seismologist
A scientist who studies earthquakes.
Foreshock
Smaller tremors that occur before a mainshock or larger earthquake.
Mainshock
The largest earthquake in a sequence.
Fault
A surface along which there has been movement of the Earth's crust.
Magnitude
A measure of the energy released during an earthquake.
Landslide
The downward movement of rock, earth, or debris on a sloped surface.
Avalanche
A mass of snow, ice, and rocks falling rapidly down a mountainside.
Volcanic Eruption
The expulsion of lava, ash, and gases from a volcano.
Disaster Preparedness
Planning and preparing for potential natural disasters to reduce impacts.
Evacuation Plan
A plan for moving people away from dangerous areas during a disaster.
Frictional Force
A force that resists the motion of moving objects.
Elastic Force
The force exerted by a material when it is stretched or compressed.
_________ is a natural event that can cause widespread destruction and loss of life.
Natural Disaster
A sudden shaking of the Earth caused by internal movements is called an ________.
Earthquake
The instrument that measures earthquakes and records them is a ________.
Seismometer
The ________ is a scale that quantifies the size of an earthquake.
Richter Scale
A ________ is an opening in the Earth from which molten rock, ash, and gases exit.
Volcano
The hot molten material beneath the Earth's surface is known as ________.
Magma
A small, often weak earthquake is referred to as a ________.
Tremor
The Earth's ________ is its outermost layer.
Crust
Below the crust lies the ________, consisting of hot rocks.
Mantle
The ________ is the innermost layer of the Earth, made up of molten material.
Core
What is a volcano?
An opening in the Earth's surface that allows hot molten rocks, ash, and gases to escape.
What does magma become when it reaches the Earth's surface?
Lava.
What type of natural disaster can cause tsunamis?
Underwater earthquakes.
What is a landslide?
The downward movement of rock, earth, or debris on a sloped surface.
What is the purpose of an evacuation plan?
To move people away from dangerous areas during a disaster.
What natural disaster can result in a rapid flow of snow, ice, and rocks?
An avalanche.
What is disaster preparedness?
Planning and preparing for potential natural disasters to reduce impacts.
Who studies earthquakes?
A seismologist.
What are foreshocks?
Smaller tremors that occur before a mainshock or larger earthquake.
What does the Richter Scale measure?
The magnitude of earthquakes.
