Volcanoes Vocabulary

Magma Liquid rock Lithosphere Asthenosphere

Magma Page 118, Paragraph 2 Fluids such as water from the subducting plate combine with nearby mantle material, causing the material to melt to form magma.

Lava Magma that erupts onto the earth’s surface explodes

Lava Page 117, Volcanism, Paragraph 3 Magma that erupts onto the earth’s surface is called lava.

Shield Volcano Volcanic cones that are broad at the base and have gently sloping sides.

Shield Volcano Page 122, Types of Volcanoes, Paragraph 1 Volcanic cones that are broad at the base and have gently sloping sides are called shield volcanoes.

Shield Volcano

Cinder Cone Volcano A volcano that has steep slopes but is not very high (to 200 meters).

Cinder Cone Volcano Page 122, Types of Volcanoes, Paragraph 2 Some explosive eruptions form cinder cones.

Cinder Cone Volcano

Stratovolcano High volcanic mountains with steep sides.

Stratovolcano Page 123, Paragraph 2 These composite volcanoes, also known as stratovolcanoes, often develop into high volcanic mountains.

Stratovolcano

Felsic Lava Lava high in silica, common in continental crust, that creates lighter colored rocks.

Felsic Lava Page 120, Paragraph 1 Felsic lava is common in the continental crust.

Felsic Lava

Mafic Lava Lava rich in magnesium and iron, found in the oceanic crust, that creates darker colored rocks.

Mafic Lava Page 120, Paragraph 1 One type of lava is dark colored when hardened and is rich in magnesium and iron. This type of lava is called mafic lava and forms much of the oceanic crust.

Mafic Lava

High Utility Words Occur = happens (suceder) Source = where it comes from (origen) Data = information (información) Environment = surroundings, where it is (entorno) Identify = say what it is (identificar)

Unfamiliar Words Viscous – thick, sticky (viscoso). Silica – one of the most abundant (abundante) elements in Earth’s crust.