Exploding Volcanoes
Second Grade
State Standard: 3(b) Students know that rock is
composed of different combinations of minerals.
By
Elizabeth Ramirez
Principal types of volcanoes
 Cinder cones
 Composite volcanoes
Shield volcanoes
Lava Domes
How are volcanoes formed
Deep in the earth is very hot. It is very hot
that rocks melt.
The melted rock is called magna.
The magna is lighter than the rocks
around so it rises.
Sometimes the magna finds a crack or
hole in the earth’s crust and burst through.
Why do volcanoes erupt?
Pressure builds deep in the earth where
the magma is.
 Volcanoes gases are the driven forces of
eruptions
 Volcanoes gases are dissolved in molten
rocks
Structure of a typical composite
volcano
Volcano’s Websites
www.Proteacher.com
www.Emunic.emich
www.nebo.edu/misc/learning