Page 2 - 新思维科学活动用书8 样章
P. 2
Contents
1 Respiration 4
1.1 The human respiratory system 4
1.2 Gas exchange 7
1.3 Breathing 8
1.4 Respiration 16
1.5 Blood 18
2 Properties of materials 23
2.1 Dissolving 23
2.2 Solutions and solubility 25
2.3 Planning a solubility investigation 30
2.4 Paper chromatography 35
3 Forces and energy 40
3.1 Forces and motion 40
3.2 Speed 44
3.3 Describing movement 49
3.4 Turning forces 53
3.5 Pressure between solids 57
3.6 Pressure in liquids and gases 62
3.7 Particles on the move 66
4 Ecosystems 71
4.1 The Sonoran Desert 71
4.2 Different ecosystems 74
4.3 Intruders in an ecosystem 78
4.4 Bioaccumulation 84
5 Materials and cycles on Earth 90
5.1 The structure of the atom 90
1
