Explanation Writing - Earthquakes

This is my explanation of how earthquakes are formed.

The Earth has a dozen tectonic and many smaller plates floating on the mantle. The Earth has 4 layers the crust, mantle, outer core and inner core. The inner core is as hot as the surface of the sun.

Firstly the plates slide into, skim past, over top of each other or bump each other. They form three types of waves. P waves or primary waves are the fastest waves, they are the first to be felt. S waves or secondary waves are the second fastest waves, they can go horizontally or vertically. Surface waves are the slowest but the most deadly. They are the waves that can knock over buildings. Surface waves roll across the ground.

A seismograph is an instrument that measures the force of an earthquake, it writes on a seismogram. A seismogram is a piece of paper. If the earthquake is small the seismograph writes small zigzags, if the earthquake is big the seismograph writes big zigzags.

Just always remember that earthquakes are super powerful.

By Poppy
Year 7