Earthquakes and tsunamis for kids


All about earthquakes for kids
Earthquake words and meanings
How does an earthquake occur
Types of earthquakes for kids
How deos a tsunami form
How to prepare for an eartquake
Things to know about earthquakes
Fact sheet on earthquakes for children


NATURAL DISASTERS

Droughts
Earthquakes
Flooding
Hurricanes
Landslides
Tornadoes
Volcanoes

Wildfires
Winds

 


Introduction to Earthquakes & Tsunamis

Turn on the TV or read the newspapers and almost always there is something devastating happening somewhere as a result of sheer nature's power. Examples of such natural occurrences are hurricanes, tornados, wildfires, volcanic eruptions, flooding, earthquakes, and tsunamis. These are usually not caused directly by humans, but their effects live with us for a long time. In this lesson, we shall look at one of such natural occurrences...earthquakes!



What is an Earthquake?


Simply, earthquakes are the rumblings, shaking or rolling of the earth's surface. It is usually what happens when two blocks of the earth suddenly slip past one another, or break apart from each other as a result of tension caused by prolonged energy build up.

break in fault lines during earthquakeEarthquakes come in many forms. It can be felt like a shock under your feet or it may be very powerful and destructive enough to flatten an entire city. They can happen anywhere, land or sea.

Foreshocks, Mainshocks and Aftershocks:
Sometimes, there are smaller shocks that occur before (foreshock) and after (aftershock) the main earthquake (mainshock). Sometimes foreshocks are so big and scientists are unsure if it is the main shock. Foreshocks and aftershocks can occur for days, weeks and months of the main earthquake.

Earthquakes are also called temblors.

Diagram of the earth crust
It is important to understand
the earth’s makeup to help understand earthquakes better.

In this diagram, you will notice that the inner and outer core of the earth (middle part) is liquid in nature, containing iron and nickel of extreme temperatures (5,500°C).

The Mantle is semi-molten rock, also called magma. The outer is the crust, which is the hard part of the earth that forms the surface. This outer crust includes the land on which we live, the oceans and ocean deeps and anything within 40km (approx) down the earth's surface.

Earthquakes are developed in the outer crust of the earth.

More on earthquakes for children

 


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