Dig for Dinosaurs

What is it like to scuba dive with H crocodiles in the Okavango delta? Or fly in a bush plane L

over the African continent? Or dig for dinosaurs in China? The National Geographic Expeditions allow you to share in the excitement and adventures of explorers, scientists, and environmentalists as they venture into the unknown. Each Expedition takes you on a journey that enriches your learning about our dynamic planet.

National Geographic Expeditions

National Geographic Expeditions

Table of Contents

892 Tracing the Human footprint Use with Chapter 2

898 Stoic of Rock Use with Chapters 7 and 8

904 Ohovongo Use with Chapters 9 and 10 910 Use with Chapters 11 and 13

916 The Next Big One Use with Chapter 19

922 Jewels in the Hsh use wm chapter 21

928 Frogs Use with Chapter 26

934 Night Vision Use with Chapters 27 and 28

Earth Scie

For more information on these Expeditions, visit glencoe.com. You can also link to original National Geographic articles that cover these topics and more.

Glen Coe Geology

Reading for Information

When you read Earth Science: Geology, the Environment, and the Universe, you need to read for information. Science is nonfiction writing; it describes real-life events, people, ideas, and technology. Here are some tools that this book has to help you read.

Before You Read

By reading the I BIG i ureas and prior to reading the chapter or section, you will get a preview of the coming material.

^ The Dynamic Earth

Each unit preview lists the chapters in the unit. ^ An overall IBM jKECT is listed for each chapter. The Big Idea describes what you will learn in the chapter.

fïïMUdeW Volcanoes develop from magma moving upward from deep within Earth.

18.1 Volcanoes

<Mda The locations of volcanoes are mostly determined by plate tectonics.

18.2 Eruptions

<<Jdea The composition of magma determines the characteristics of a volcanic eruption.

18.3 Intrusive Activity fllflffl Magma that solidifies below ground forms geologic features different from those formed by magma that cools at the surface.

• All the lava from Kilauea could pave a road three times around Earth.

• There are 500 active volcanoes on Earth today.

• Magma comes from the Greek word meaning dough.

• Many of Earth's geographic features are caused by volcanoes.

Chapter 17

Plate Tectonics

(BIG( (Idea Most geologic activity occurs at the boundaries between

Chapter 18

Volcanism

I BIG rfffT Volcanoes develop from magma moving upward from deep within Earth.

Chapter 19

Earthquakes

|BIG( Idea Earthquakes are natural vibrations of the ground, some of which are caused by movement along fractures in Earth's crust.

Chapter 20

Mountain Building

IBGGIdlJil Mountains form through dynamic processes which crumple, fold, and create faults in Earth's crust.

y The__yjdeas within a chapter support the

IBMfIdlfla of the chapter. Each section of the chapter has a Main Idea that describes the focus of the section.

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