Page 3 - 新思维科学活动用书5 样章
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Contents
C ontents
5 Forces and magnetism 62
5.1 Gravity, normal forces and applied forces 62
5.2 Gravity and satellites 66
5.3 Friction, air resistance, water resistance and upthrust 70
5.4 Multiple forces 74
5.5 Magnets and magnetic materials 77
5.6 Magnetic force 81
6 Seasons and adaptations of plants and animals 86
6.1 The Earth moves around the Sun 86
6.2 Seasonal changes 90
6.3 Plants and animals are adapted to different environments 95
6.4 Adaptations of predators and prey 100
Acknowledge 104
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