Our Dynamic EarthOur Dynamic Earth

By Chubbylemon, Smi1eface and By Chubbylemon, Smi1eface and Honeybun27Honeybun27

IntroductionIntroduction

This slide show is all about my dynamic earth. We will be talking about: tectonic plates, volcanoes, tsunami and earthquakes. We will tell you about how these natural disasters and other inserting facts.

VolcanoesVolcanoes

• Volcanoes are usually mountains with a crater at the top.

• Most eruptions happen in the crater. • Sometimes lava flows out the vent. • When magma erupts from the ground, it is

then known as lava.• When lava cools, it becomes solid rock.

TsunamisTsunamis

• A tsunami is a big wave of water. • A tsunami is caused by an under ground

earthquake. • Tsunamis can reach to the height of 7.50

meters tall. • After a tsunami has finished there would

be some sea creatures on the land. • They travel unnoticed but grow as they

reach the shore.

FactsFacts

• Life depends on water, in all of its forms.• Earth is the only one we know to support

life. • Earths temperature is just the right for

water to be present in the atmosphere, oceans, soil and icecaps.

• Coal is formed by carbon. • All of natural disasters are dangerous.

What Causes These Natural What Causes These Natural Disasters To Happen Disasters To Happen

• Earthquakes are caused by tectonic plates merging together and over lapping each other.

• Volcanoes are caused by the magma chamber bubbling and then the volcano erupts.

• Tsunamis are caused by an under ground earthquake. An under ground earthquake is caused the same way as an earthquake.( But under the sea.)

Tectonic PlatesTectonic Plates

• When tectonic plates merge together it causes a natural disaster.

• There are 3 types of tectonic plates. Convergent, Transform and Divergent.

• Convergent tectonic plate merges and over laps.

• The Transform move different directions. • Divergent Tectonic plates push away from

each other.

EarthquakesEarthquakes• Scientists that study earthquakes are

called seismologists. • The safest place to be is under a strong

table or in a door way. • Scientists use measuring instruments to

listen to the semic waves, the measuring instruments are called seismometers.

• Most scientists use two measuring scales to measure on earthquake.

• Earth is more than 4.5 billion years old.• Earth have over 500 active volcanoes.• Lava flows under the water.