Volcanic Eruptions.

Slides:

Advertisements

Similar presentations

REVIEW FOR CHAPTER 6 – VOLCANOES. Where can we find volcanoes on earth? Most volcanoes are found near subduction zones and mid-ocean ridges. This explains.

Advertisements

Welcome to Science 10/20 Today’s Schedule 1. Question of the Day

WARM UP!!! Thursday 1/31/08 Describe a magma chamber!

Welcome to Science 10/25 Get out your lab sheet. You have 3 minutes to create the type of volcano listed on your card. Have your group help you if needed.

Volcanoes Chapter 6.

Chapter 18 Volcanoes Section Two Volcanic Activity.

Chapter 5 Section 2: Volcanic Eruptions. Directions : Define the following terms. 1. Magma chamber1. Magma collects in a pocket beneath a volcano 2. pipe2.

Volcanoes Nat Geo. Volcanic Eruptions (pages 209–216)

Chapter 7 Sections 3 & 4 volcanoes.

VOLCANOES Sections 1 and 3 A volcano is a weak spot in the crust where molten.

Complete the paragraph below Lava begins as, which usually forms in the asthenosphere. The materials of the asthenosphere are under great pressure. Liquid.

Forces Inside the Earth

Volcanic Eruptions.

Volcanic Eruptions and Volcano Type. What is a volcano? A volcano is any place where gas, ash, or melted rock come out of the ground.

Volcanoes Magma Reaches the Earth’s Surface KEY CONCEPT:When a Volcano erupts, the force of the expanding gases pushes magma from the magma chamber through.

Bellringer How does the silica content affect the overall viscosity of a particular lava flow?

Inside Earth: Chapter 3- Volcanoes

Volcanic Activity.

Volcanic Eruptions 7.3 p

 Chapter 5: Volcanoes ES 5.2 Volcanic Eruptions.

VOLCANOES YEAR 7.

III. Section 3 Volcanic Eruptions. A. Magma Reaches Earth’s Surface 1.Magma chamber- magma collects in a pocket 2.Pipe- the magma moves through which.

Volcanoes Chapter 3 book F page 82.

Volcanic Activity. Magma Reaching the Surface Materials of asthenosphere under great pressure Materials of asthenosphere under great pressure Magma less.

Science ~ chapter 6 volcanoes

Volcano Types and Volcanic Eruptions.

A volcano is a place (usually a mountain) where magma reaches Earth’s surface.

18.2 Notes: Volcano Anatomy Main Idea 1: Volcanoes look like mountains, but they form as a result of repeated eruptions of magma from underground. Redoubt,

Volcanic Eruptions Chapter 5.2. Magma becomes a volcano: Lava usually begins as magma, which usually forms in the asthenosphere. Liquid magma is less.

Structure of a Volcano.

Volcanic Eruptions Chapter 3-3. Inside a Volcano.

Volcanic Eruptions ch. 6 section 2

Table of Contents Essential Question: How Does A Volcano Erupt? What happens when a volcano erupts? What are the stages of Volcanic activity? 6.2 Volcanic.

Learning Objectives - I can distinguish between nonexplosive & explosive volcanic eruptions. I can distinguish between nonexplosive & explosive volcanic.

Volcanic Eruptions. Hawaii – many myths about Pele, the fire goddess of volcanoes Pele lives in the depths of Hawaii’s erupting volcanoes When Pele is.

Volcanoes. Volcano Volcano is a weak spot in the crust where molten material or magma comes to the surface. Magma is a molten mixture of rock forming.

Unit 5 Volcanoes. I. Volcano Basics a.A volcano is a mountain that forms in the Earth’s Crust when molten material (magma) reaches the surface b. Volcanic.

Volcano Notes Volcano – a place (usually a mountain) where magma reaches the earth’s surface.

Volcanoes A volcano is a weak spot in the crust where the molten material, or magma, comes to the surface.

Volcanic Eruptions VOLCANOES. WHAT HAPPENS WHEN A VOLCANO ERUPTS? Lava begins as magma. Magma usually forms in the somewhat soft layer of hot, solid rock.

VOLCANOES BY DIANA &NATALIE. HOT SPOT VOLCANOES  IT IS AN AREA WHERE MATIREAL FROM DEEP WITHIN THE MANTLE RISES AND THEN MELTS,FORMING MAGMA.  A VOLCANO.

Three Types of Volcanoes

Volcanoes 6th Grade Ms. Mudd.

Volcanoes Chapter 7.

Volcanic Eruptions 3.3 Objectives:

Unit 4 Lesson 4 Volcanoes.

Volcanoes are often cone-shaped, but they can take other shapes too.

Magma A mixture of rock-forming substances, gases, and water from the mantle. When it reaches the surface it is called lava.

Volcanic Eruptions.

The Nature of Volcanic Eruptions

Three Types of Volcanoes

Volcanic Eruptions volcano: a vent or fissure in the Earth’s surface through which magma and gases are expelled - molten rock in volcanoes is called magma.

Volcanoes are often cone-shaped, but they can take other shapes too.

5.1 Volcanoes and Plate Tectonics

Volcanoes A volcano is a cone shaped mountain formed from lava or lava and ash which has been forced through a hole in the earth's crust. Volcanoes are.

Nature of Volcanic Eruptions

Ch.6, Sec.1 - Volcanic Eruptions

What is a volcano?.

Volcanoes are often cone-shaped, but they can take other shapes too.

Volcanoes are often cone-shaped, but they can take other shapes too.

When Mount St. Helens erupted, trapped gases caused the north side of the mountain to explode. Volcanic ash was ejected high into the atmosphere.

Warm-Up: Fri 2/21 Write What You Know!

Volcanic Activity.

Volcanoes are often cone-shaped, but they can take other shapes too.

Get Ready for an ERUPTION!!!

Volcanoes are often cone-shaped, but they can take other shapes too.

Volcanoes are often cone-shaped, but they can take other shapes too.

Volcanoes are often cone-shaped, but they can take other shapes too.

7.3 volcanic eruptions What happens when a volcano erupts? What are the two types of volcanic eruptions? What are a volcano’s stages of activity? Key terms:

Presentation transcript:

Volcanic Eruptions

Inside a Volcano All volcanos have a – Magma Chamber Pipe Vent Side vents Lava flow Crater

Volcano Eruption These are similar to when you shake a can of soda Gasses are trapped inside the lava When magma rises towards the surface the pressure decreases. When under decreased pressure the gasses expand and form bubbles These gas bubbles eventually form enough force to cause a volcanic eruption

Volcano Eruptions Quite Eruptions Explosive Eruptions Magma is low in silica, low viscosity Magma constantly oozes quietly from vent and can travel many kilometers Main Island of Hawaii was formed from quite eruptions over hundreds of thousands of years Magma is high in silica, high viscosity Magma does not constantly erupt so this causes pressure to build up over time. Gasses cannot escape from the magma so pressure builds until it explodes. Mount St. Helens is an example. Last erupted in 1980.

Volcano Eruptions Pyroclastic flow- occurs when an explosive eruption hurls out a mixture of hot gases, ash, cinders, and bombs (big pieces of rock). Can be more dangerous then the lava.

Life Cycle of a Volcano Active volcano- is a volcano that had erupted recently or has shown signs that it might erupt soon. Dormant volcano- is a volcano that has not erupted in a long time but scientist expect that it should erupt again in the future. Extinct volcano- is a volcano that is unlikely to erupt ever again.