목차

UNIT 1 The Car
OBSERVE TO WRITE: Model Writing Carl Benz and the First Car with a Gasoline Engine
THINK TO WRITE: GO Writing Leonardo da Vinci and the First Self-Propelled Car
DEVELOP TO WRITE: Student Writing Josef Cugnot and the First Car with a Steam Engine

UNIT 2 New Year’s around the World
OBSERVE TO WRITE: Model Writing New Year’s in Korea
THINK TO WRITE: GO Writing New Year’s in China
DEVELOP TO WRITE: Student Writing New Year’s in North America

UNIT 3 The Growth of Socieities
OBSERVE TO WRITE: Model Writing The Growth of Agrarian Societies
THINK TO WRITE: GO Writing The Growth of Information Societies
DEVELOP TO WRITE: Student Writing The Growth of Industrial Societies

UNIT 4 Laws and Norms
OBSERVE TO WRITE: Model Writing Criminal Law
THINK TO WRITE: GO Writing Civil Law
DEVELOP TO WRITE: Student Writing Social Norms

UNIT 5 Population Problems
OBSERVE TO WRITE: Model Writing Japan’s Old Population
THINK TO WRITE: GO Writing India’s Large Population
DEVELOP TO WRITE: Student Writing Yemen’s Young Population

UNIT 6 Natural Resources
OBSERVE TO WRITE: Model Writing Oil for the U.S.
THINK TO WRITE: GO Writing Natural Gas for France
DEVELOP TO WRITE: Student Writing Water for Egypt

UNIT 7 Ecosystems
OBSERVE TO WRITE: Model Writing Hot Deserts and Cold Deserts
THINK TO WRITE: GO Writing Lakes and Ponds
DEVELOP TO WRITE: Student Writing Sandy Beaches and Rocky Beaches

UNIT 8 The Human Body
OBSERVE TO WRITE: Model Writing The Circulatory System
THINK TO WRITE: GO Writing The Respiratory System
DEVELOP TO WRITE: Student Writing The Digestive System

UNIT 9 Climate Change
OBSERVE TO WRITE: Model Writing Changes in Rainfall
THINK TO WRITE: GO Writing Changes in Life
DEVELOP TO WRITE: Student Writing Changes in Seas and Sea Ice

UNIT 10 Energy Sources
OBSERVE TO WRITE: Model Writing Nuclear Energy
THINK TO WRITE: GO Writing Methane Hydrate Energy
DEVELOP TO WRITE: Student Writing Hydrogen Fuel Cell Energy