Fast Land Changes

The groud freezes and melts when it's warmer.

Magma moves up from the mantle and erupts.

Large pieces of land break off and slide down.

Water in streams and rivers overflow the banks.

They damage many roads and homes.

They make Earth's mantle stronger.

They can bring rich soil to an area.

They form new islands in the oceans.

lava

plate

crust

magma

Tectonic plates push and slip past each other.

Heavy rains make rivers overflow their banks.

Waves travel across the seas and break on land.

Strong winds push apart pieces of land.

dead

alive

lava

warm

Volcanoes are all active and can erupt at any time.

Volcanoes can spit out ash, molten rock, and gases.

Volcanoes give rich soil that is good for farming.

Volcanoes can erupt and the lava can form islands.

Magma can cool to form hills, but lava cannot form hills.

Lava flows to the mantle, and magma flows to the crust.

Lava is very cold and hard, and magma is very hot.

Magma is underground, and lava is on the surface.

A big wave hits a coast and causes flooding.

An earthquake occures in the middle of the sea.

The earthquake causes a big wave to form.

The wave travels across the sea and gets bigger.

The tectonic plates are part of the Earth's center core.

Earthquakes happen when they slip against each other.

They lie on top of all the continents and the oceans.

There are five major tectonic plates and two minor ones.

flash flood

wet flood

lazy flood

gradual flood