Chapter 7 Sections 1 & 2. Volcanoes & Plate Tectonics (Sect 1)  Volcano – a weak spot in the earth’s crust where magma comes to the surface  There are.

Slides:

Advertisements

Similar presentations

Composite Volcanoes Review: What characteristics make a composite volcano? Answer: High Gas, High Silica, High Viscosity.

Advertisements

So what has caused the continents to drift ??

Plate Tectonics.

Introduction to Volcanoes

VOLCANOES AND PLATE TECTONICS Ch. 3.1, 3.3, 3.4

VOLCANOES AND PLATE TECTONICS Ch. 3.1, 3.3, 3.4. A. Volcanoes 1. A weak spot in the crust 2. Magma-molten material from mantle comes to the surface.

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

Volcanoes Earth and Space Science. How many are there? About 60 of the ~550 known active volcanoes erupt each year There are many more volcanoes underwater.

Forces Inside the Earth

Chapter 3 – Volcanoes.  Volcanic belts from along the boundaries of Earth’s plates.  There are 600 active volcanoes on land and many more beneath the.

Copyright © 2014 All rights reserved, Government of Newfoundland and Labrador Earth Systems 3209 Unit: 4 The Forces Within Earth Reference: Chapters 4,

Volcanoes and Plate Tectonics EQ: Where are Earth’s volcanic regions?

Notebook Set Up review When we start a new chapter… First, go to the next clean (front and back) page in your notebook and fold in into a triangle divider.

Question Where are volcanoes found? What is a hot spot? Answer Volcanoes form along the boundaries of Earth's plates. An area where material from deep.

Properties of Magma 7.2 p

Volcanoes & Plate Tectonics CH 6 Prentice Hall p

Volcanoes and Plate Tectonics. Volcanism is mostly focused at plate margins Pacific Ring of Fire This map shows the margins of the Pacific tectonic plate.

Geography 12 Plate Tectonics Ms. Inden. Take a look at this picture of the Ring of Fire! The area that we are discussing is the darker peachy-pink area.

6.1 Volcanoes Table of Contents

Section One Volcanoes and Plate Tectonics

Inside Earth Chapter 3 Volcanoes 3.1 Volcanoes and Plate Tectonics

Section 1: Volcanoes and Plate Tectonics What Is a Volcano?

AIM: Where are most volcanoes found and how do hot spots form? OBJ: Given notes and activity sheet SWBAT explain where most volcanoes are found and how.

Table of Contents Volcanoes and Plate Tectonics Properties of Magma

Plate Boundaries. Types of Crust Continental Crust Less dense granite Oceanic Crust More dense basalt.

Volcanos: Chapter Volcano A volcano is a week spot in the crust where molten material, or magma, comes to the surface.

Properties of Magma Chapter 3-2. Viscosity Liquids resistance to flow Magma’s viscosity varies Depends on temperature and silica content The higher the.

Plate Tectonics - Part C - Volcanoes and Plate tectonics -Use your table of contents to find Chapter 15 Section 1 -Flip through the section looking at.

I will be able to: Demonstrate my knowledge of Energy Transfer and Plate Tectonics. I will be able to: Demonstrate my knowledge of Energy Transfer and.

Volcanoes Objective: Identify how magma forms as a result of plate motion Explain why plate boundaries have volcanic activity.

Lesson 7.1: Volcanoes and Plate Boundaries. Volcano What is a volcano? How do volcanoes form? Where do volcanoes occur?

I NSIDE E ARTH : V OLCANOES Section 1: Volcanoes and Plate Tectonics.

Bellringer Create an explanation that correlates plate tectonics, earthquakes, AND volcanoes.

Chapter 3 section 2 Properties of Magma. Introduction a. Measured from the bottom of the Pacific Ocean, the Big Island of Hawaii is the largest mountain.

Volcanoes and Plate Tectonics A volcano is a weak spot in the crust where molten material, or magma, comes to the surface. Magma is a molten mixture of.

VOLCANOES & IGNEOUS ACTIVITY CHAPTER 10. Section 10.1.

Chapter 3. BELL WORK 1. Define the vocabulary: Ring of Fire, island arc 2. Page 89, Figure 1: Write and answer the question 3. Page 91, Figure 3: Write.

Volcanoes Chapter 7. Volcanoes Volcano is a weak spot in crust where molten material comes to the surface Magma is a molten mixture of rock-forming.

VOLCANOES. TECTONICS  Earth’s crust is divided into plates.  Convection currents in Earth’s mantle causes the plates to move.  Plate movement results.

Volcanoes and Plate Tectonics Chapter 6 Section 1.

Volcanoes can form at any point where the crust is weak. They mostly form along boundaries of Earth’s plates because that is where the rocks tend to be.

Volcanoes. Volcanic Activity Stages of a Volcano Active: Erupting or showing signs of an eruption in the near future Dormant: volcano not currently erupting.

VOLCANOES YEAR VOLCANOES AND PLATE TECTONICS 1995, Soufriere Volcano in Montserrat (Caribbean). Volcanic picturesVolcanic pictures A volcano is.

Section 10-1 What is a volcano?

Volcanoes and Plate Tectonics (Part 3)

Homework Metamorphic rock lab due Monday Read section 9.3

Definitions Section 9.2.

What is a volcano? An opening in the crust of

Objective: To learn about the properties of magma

I. Section 1 Volcanoes and Plate Tectonics

Chapter 13 Volcanoes 101 Videoclip

What is a Volcano A 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.

Warm-Up: Wed 2/19 Write What You Know!

Volcanoes and Plate Tectonics

VOLCANOES CH. 3.1 Volcano (3:08) Volcano.

Chapter 3: Volcanoes.

Volcanoes & Plate Tectonics

Volcanoes and Plate Tectonics Chapter 6.1 Notes

Volcanoes Earth Science Chapter 10.

Chapter 13 Volcanoes 101 Videoclip

VOLCANOES AND PLATE TECTONICS

Chapter 7 Section 1 Key terms: Volcano, magma, lava, ring of fire, island arc, hot spot Key concepts: Where are most of Earth’s volcanoes found? How do.

INSIDE EARTH: CHAPTER 3- VOLCANOES

Presentation transcript:

Chapter 7 Sections 1 & 2

Volcanoes & Plate Tectonics (Sect 1)  Volcano – a weak spot in the earth’s crust where magma comes to the surface  There are over 600 active volcanoes on land and many more under the sea!  Volcanoes are located at 1) plate boundaries and 2) at hot spots.  Volcanoes located at plate boundaries form volcanic belts.

Volcanoes & plate boundaries Volcanic belt that surrounds or lines the Pacific Ocean is called: THE RING OF FIRE

Video – Click to begin

Volcanoes can form at divergent and convergent plate boundaries.  Big divergent boundaries – Mid Atlantic Ridge and Great Rift that travels through the middle of Africa (Great Rift Valley) Mid Atlantic Ridge Great Rift Valley

Africa’s Great Rift Valley

Oceanic-Oceanic Convergent Boundary  The denser plate subducts, magma rises and eventually forms islands. The islands form an ISLAND ARC. The islands arrangement is in the same shape as the plate boundary that formed them. EX: Japan, New Zealand, Phillippines, Caribbean Islands.

Oceanic-Continental Crust Boundaries  Oceanic Plate subducts under the less dense continental plate. Coastal volcanoes form. EX: Mt St Helens; Andes in S. America

Volcanoes located along boundary btw North Amer Plate and Pacific Plate.

HOT SPOT VOLCANOES  These volcanoes occur in the middle of a plate instead of at a plate boundary.  There is a weak spot in the middle of a plate and sometimes islands can form. HOT SPOTS: Hawaiian Islands, Yellowstone Nat’l Park.

Hot Spots Video Clip – click

Hot Spot Islands

Hawaiian Islands

PROPERTIES OF MAGMA (sect 2)  Every substance has its own chemical and physical properties. These properties can be used to identify a substance and predict how it will behave. PHYSICAL property: a characteristic that can be observed without changing the composition of the substance. (color, density, mass, hardness, melting point, etc) CHEMICAL property: characteristics that describe a substance’s ability to form new substances. (corrosive, flammable, etc)

VISCOSITY  Magma/lava can be described by its viscosity.  VISCOSITY: resistance of a liquid to flowing.  High Viscosity – flows very slowly (ketchup)  Low Viscosity – flows quickly (water)

Which has higher viscosity?

Viscosity of magma depends on 2 things:  1) Silica content  2) Temperature  Silica Content: ranges from 50% - 70% Higher silica Higher viscosity High silica magma is lighter in color, doesn’t flow Very far; cools to form rhyolite. Less silica – magma is darker; flows faster; cools to form basalt

Viscosity & Temperature  Temperature of magma ranges from 750 o – 1175 o C Higher temperature Lower viscosity Hotter magma flows faster; cooler magma flows more slowly.

Two Types of Lava :  Pahoehoe : low viscosity, fast moving, wrinkles, billows, ropy  Aa : high viscosity, cooler, Slower, rough, and jagged Think about what you would say if you walked on this barefooted… “Aa”

Lava video – Click to watch