'Volcanic rock fragments' presentation slideshows

Volcanoes

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VOLCANIC ACTIVITY

VOLCANIC ACTIVITY. volcanism = any activity that includes movement of magma toward or onto surface volcanologists = scientists who study volcanoes - also called vulcanist. magma = mixture of molten rock, suspended mineral grains, and dissolved gases deep below surface

374 views • 37 slides

Types of Volcanoes and Volcanic Hazards

Types of Volcanoes and Volcanic Hazards. Earth and Space Science. Types of Volcanoes. 1 . Shield volcanoes - Lava flows a great distance before having a chance to cool - Forms a very broad volcano with gentle sloping sides as more lava flows over previously cooled lava.

472 views • 28 slides

Eruptions!

Eruptions!. What comes out of volcanoes? . Lava Rock fragments Ash Blocks. How does an eruption happen?. Magma is made of silicon and oxygen. Magma is also made up of gases. 1.) Gases in the magma begin to expand 2.) Gases have no where to escape 3.) Pressure builds up

197 views • 8 slides