'Magma flows' presentation slideshows

Chapter 3: Volcanoes

655 views • 64 slides

Chapter 3: Volcanoes

1.12k views • 63 slides

Volcanoes

Volcanoes. Volcano. Repeated eruptions of lava and pyroclastic material Often separated by long inactive periods Often forms a mountain. What causes volcanoes?. Magma forms deep inside Earth Less dense than rock above it, so slowly forced upward

585 views • 50 slides

Section 2: Volcanic Activity

Section 2: Volcanic Activity. Friday, March 12, 2010 Pages 183 -- 192. Arenal Volcano -- Costa Rica. Objectives. Describe what happens when a volcano erupts. Explain how the two types of volcanic eruptions differ depending on the characteristics of magma. Identify some hazards of volcanoes

455 views • 23 slides

275 views • 18 slides

Volcanic Eruptions 3.3

Volcanic Eruptions 3.3. Objectives: Explain what happens when a volcano erupts. Describe 2 types of volcanic eruptions Identify stages of volcanic activity. Volcanic Eruptions 3.3. What comes out of volcanic explosions? Ash, lava, steam, rock, gases, dirt Magma forms in the asthenosphere

444 views • 18 slides

Can We Really Dig to China?

240 views • 14 slides

Volcanic Activity

Volcanic Activity. How Magma Reaches the Surface. Magma rises because magma is less dense than the surrounding solid material. It will rise until it reaches the surface or becomes trapped beneath layer of rock. A Volcano Erupts.

136 views • 13 slides

Volcanic Activity

Volcanic Activity. How Magma Reaches the Surface. Magma rises because magma is less __________ than the surrounding _________ material. It will rise until it reaches the ___________ or becomes trapped beneath _________ of _________. A Volcano Erupts.

126 views • 12 slides