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Ŀ¼ Introduction
How to Use This Book
Chapter 1 Social Studies ¡ï History and Geography ¢Ù | 9
Unit 01 Laws and Rules ·¨ÂÉÓë¹æ·¶ | 10
Unit 02 Earning, Spending, and Saving ÊÕÈë¡¢Ö§³öÓë´¢Ðî | 14
Unit 03 Goods and Resources ÉÌÆ·Óë×ÊÔ´ | 18
Unit 04 Technology Changes the World ¿Æ¼¼¸Ä±äÊÀ½ç | 22
Unit 05 Living in Different Climates Éú»îÔÚ²»Í¬µÄÆøºòÖÐ | 26
Review Test 1 | 30
Chapter 2 Social Studies ¡ï History and Geography ¢Ú | 31
Unit 06 Geography Skills µØÀí¼¼ÄÜ | 32
Unit 07 The Government Õþ¸®²¿ÃÅ | 36
Unit 08 Ancient Egypt ¹Å°£¼° | 40
Unit 09 Ancient Greece ¹ÅÏ£À° | 44
Unit 10 Ancient Rome ¹ÅÂÞÂí | 48
Review Test 2 | 52
Chapter 3 Science ¢Ù | 53
Unit 11 A World of Plants Ö²ÎïµÄÊÀ½ç | 54
Unit 12 A World of Animals ¶¯ÎïµÄÊÀ½ç | 58
Unit 13 Food Chains ʳÎïÁ´ | 62
Unit 14 Ecosystems Éú̬ϵͳ | 66
Unit 15 Earth’s Rocks and Soil µØÇòµÄÑÒʯºÍÍÁÈÀ | 70
Review Test 3 | 74
Chapter 4 Science ¢Ú | 75
Unit 16 Conserving Our Resources ±£»¤×ÊÔ´ | 76
Unit 17 Earth’s Changing Surface µØ±íµÄ±ä»¯ | 80
Unit 18 Weather and the Water Cycle ÌìÆøºÍˮѭ»· | 84
Unit 19 The Universe ÓîÖæ | 88
Unit 20 The Senses ¸÷Öָй٠| 92
Review Test 4 | 96
Chapter 5 Mathematics | 97
Unit 21 Fractions ·ÖÊý | 98
Unit 22 Geometry ¼¸ºÎѧ | 102
Unit 23 Multiplication and Division ³Ë·¨ºÍ³ý·¨ | 106
Unit 24 Measurement ²âÁ¿ | 110
Review Test 5 | 114
Chapter 6 Language ¡ï Visual Arts ¡ï Music | 115
Unit 25 Myths from Ancient Greece ¹ÅÏ£À°Éñ»° | 116
Unit 26 Learning About Language ѧϰÓïÑÔ | 120
Unit 27 Appreciating Artwork ÒÕÊõ¼øÉÍ | 124
Unit 28 Creating Designs ´´ÔìÉè¼Æ | 128
Unit 29 Elements of Music ÒôÀÖµÄÔªËØ | 132
Unit 30 A World of Music ÒôÀÖµÄÊÀ½ç | 136
Review Test 6 | 140 Index | 141
Answers and Translations | 147