Volcanoes

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Volcanoes : 

Volcanoes By: Craig Berry

Why I decided this topic : 

Why I decided this topic Interesting Always been fascinating to me To better understand Hawaii Formation of the Hawaiian Islands

Basic Information on Volcanoes : 

Basic Information on Volcanoes Volcanoes are mountains Formed by an uplift or erosion Connects to molten rock below the Earth’s surface The term volcano refers to the opening where the lava and gases are released Once the molten rock and gases are released it can be very dangerous for neighboring houses/cities An eruption occurs when magma rises out of the volcano and hits the Earth’s surface.

Basic Information Cont. : 

Basic Information Cont. There are an estimated 575 active volcanoes Not including the ones below the sea According to Scientist approximately 225,000 people have died from volcanic eruptions in the last 500 years Forced around 500,000 people out of their homes

Hawaiian Volcanoes : 

Hawaiian Volcanoes

Life Stages of Hawaiian Volcanoes : 

Life Stages of Hawaiian Volcanoes

Lava Types : 

Lava Types Two main types Pāhoehoe “Smooth” fluid lava Thin flow Slow moving ‘A‘ā “Rough” lava Thick flow Fast moving

Lava Types Cont. : 

Lava Types Cont. Examples of ‘A‘ā and Pāhoehoe Chain of Craters Road, Big Island Old Pali Road, Oahu

Erosion (NW Hawaiian Islands) : 

Erosion (NW Hawaiian Islands) Islands are continually shrinking Nihoa Island -This is from continued erosion from the sea

Interview with Scott Rowland : 

Interview with Scott Rowland Ph.D. University of Hawai’i, 1987 Specialist in Volcanology& Geology

What is the largest active volcano in the world? : 

What is the largest active volcano in the world? Mauna Loa in Hawaii! It stands around 13,600 feet Located on the Big Island Last eruption was in 1984 Mauna Loa from Saddle Road

How were the Hawaiian Islands formed? : 

How were the Hawaiian Islands formed? The Islands are just the tops of these massive volcanic mountains. They were formed by the numerous eruptions and over the course of several million years the lava just built up and created the Islands

What makes a volcano erupt? : 

What makes a volcano erupt? Volcanoes erupt once they reach the temperature of around 200 degrees Celsius. A volcano can even erupt ice if it reaches around -350 degrees Celsius. Common in Alaska and polar regions

How much notice is there before an eruption occurs? : 

How much notice is there before an eruption occurs? There is no clear-cut answer for this question however some scientist believe that gases are visible well over 30 minutes before a volcanic eruption occurs.

What are characteristics of a volcano? : 

What are characteristics of a volcano? A volcano consists of: Magma Magma chamber A vent where the magma spews out of

Characteristics of a volcano : 

Characteristics of a volcano

What exactly is lava? : 

What exactly is lava? Lava consists of: Crystals Volcanic glass Volcanic gases called “bubbles”

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