P-5+Magma

Magma
 * Magma is molten rock beneath the earths crust.
 * Magma usually collects in a magma chamber beneath a volcano.
 * Magma is located in the mantle.
 * Magma's temperature usually ranges around 700-1300 degrees celius.
 * When magma reaches the surface of the crust it becomes lava.
 * Magma contained silica.
 * The amount of silica depends on its viscosity (resistence to flow).
 * There are two types of magma; basaltic magma and granitic magma.
 * Basaltic magma only has 50% of silica while granitic magma has 70% of silica.
 * Basaltic magma is more fluid magma than granitic magma which is thicker.
 * Magma makes igneos rocks