Acknowledgements
We would like to thank the following for permission to reproduce copyright materials. a = activity q = question fig = figure
© Panya Kuanun | Dreamstime.com / p.70 (a4, fig2) © Pavel Goberman | Dreamstime.com / p.69 (a3, q2, fig1) © Psychoshadowmaker | Dreamstime.com / p.18 (a1, q3, fig1) © Ronstik | Dreamstime.com / p.69 (a3, q2, fig3) © Sebastian423 | Dreamstime.com / p.41 (a1, q2, fig1) © Serdar Basak | Dreamstime.com / p.43 (a3, q2, fig1) © Sergiy Molchenko | Dreamstime.com / p.18 (a1, q3, fig3) © Shao-chun Wang | Dreamstime.com / p.42 (a2, Learn More, gold jewelleries) © Soleg1974 | Dreamstime.com / p.37 (a5, q2, fig2) © Steve Lovegrove | Dreamstime.com / unit 8 cover (treads on tires) © Steve Meddle | Dreamstime.com / appendix 4, Reading to Learn (food waste before breakdown) © Stockcreations | Dreamstime.com / p.60 (a3, q2, bathroom mat) © Tasakorn Kongmoon | Dreamstime.com / p.37 (a5, q2, fig5) © Tea | Dreamstime.com / p.59 (a2, q3, fig2) © Tetyana Kormych | Dreamstime.com / p.46 (a5, fig3) © Thanakon Niamchaona | Dreamstime.com / p.42 (a2, q1 (2), fig2) © Tilo | Dreamstime.com / appendix 4, Reading to Learn (rabbit) © Timothy Hodgkinson | Dreamstime.com / unit 9 cover (Earth) © Unnop Kosolsupasirichai | Dreamstime.com / p.32 (a1, q1, spoon) © Usersam2007 | Dreamstime.com / p.26 (a1, q3, battery) © Vaitekune | Dreamstime.com / p.43 (a3, q1, fig1) © Vlabos | Dreamstime.com / p.27 (a1, More to Explore, buzzer) © Vladimir Surkov | Dreamstime.com / p.46 (a5, fig2) © Vladimir Taut | Dreamstime.com / p.61 (a3, q4, fig1 & fig2) © Vladwitty | Dreamstime.com / appendix 4, Reading to Learn (plants) © Vyychan | Dreamstime.com / p.72–73 (a5, long march family rocket models) © Wachiwit | Dreamstime.com / p.70–71 (a4, fig3) © Worldshots | Dreamstime.com / p.16 (a1, q2, fig3) © Yl Law | Dreamstime.com / p.53 (a3, q4 (1), fig1 ) © Ymgerman | Dreamstime.com / p.16 (a1, q1, fig3) China News Service / p.67 (a2, fig5 & fig6); p.68 (a3, Chinese space suit); p.72 (a5, Astronaut Yang Liwei, astronaut leaving the spacecraft and space laboratory Tiangong-1 ); p.73 (a5, lunar rover Yutu & BeiDou Navigation Satellite System & Mars probe Tianwen-1 & Zhurong ); appendix 5, Reading to Learn (Zhai Zhigang, astronaut leaving the spacecraft, Wang Yaping giving a space lesson, Shenzhou-14 astronauts, Jing Haipeng) CLP Power Hong Kong Limited / p.23 (a3, More to Explore, CLP Power Low Carbon Energy Education Centre) iStock.com / BSANI / unit 7 cover (frying pan) iStock.com / CHUNYIP WONG / appendix 3, Reading to Learn (Hong Kong Science Park) iStock.com / dimamorgan12 / p.60 (a3, q1, bicycle brake pads) iStock.com / laddawan punna / p.71 (a4, fig4) iStock.com / yurouguan / unit 8 cover (bicycle reflectors) National Aeronautics and Space Administration / p.66 (a2, fig1 to fig3; p.67 (a2, fig4); p.68 (a3, astronaut drinking) N.C.N. Limited / p.72 (a5, satellite Dongfanghong-1) The Hong Kong and China Gas Company / p.17 (a1, Learn More, town gas production plant) Visual China Group / unit 9 cover (satellite MoZi & the Tiangong space station)
© Ab2147272 | Dreamstime.com / p.44 (a3, q5, fig1) © Aleksas Kvedoras | Dreamstime.com / p. 18 (a1, q3, fig2) © Alekseykolotvin28 | Dreamstime.com / p.37 (a5, q2, fig4) © Alessandro Tortora | Dreamstime.com / unit 7 cover (oranges on a plate) © Alexandr Vasilyev | Dreamstime.com / p.34 (a3, fig5 & fig6) © Anankkml | Dreamstime.com / p.16 (a1, q2, fig2) © Boarding1now | Dreamstime.com / unit 3 cover (shoe sole) © Buradaki | Dreamstime.com / p.7 (a2, Earth); p.54 (a4, q3) © Carsten Kienitz | Dreamstime.com / p.22 (a2, q3, fig1) © Celso Pupo Rodrigues | Dreamstime.com / p.41 (a1, q2, fig3) © Dimitar Karakostadinov | Dreamstime.com / p.50 (a1, q1) © Domnitsky | Dreamstime.com / p.43 (a3, q1, fig2) © Doraemon123669 Dreamstime.com / unit 8 cover (Ma On Shan coast) © Evgeny Karandaev | Dreamstime.com / p.37 (a5, q2, fig6)
© Flynt | Dreamstime.com / p.32 (a1, q1, gold medal) © Gorgios | Dreamstime.com / p.43 (a3, q2, fig2) © Grazvydas | Dreamstime.com / p.12 (a3, apple) © Grejak | Dreamstime.com / p.71 (a4, fig5) © Hse0193 | Dreamstime.com / p.22 (a2, q3, fig7) © Hywit Dimyadi | Dreamstime.com / p.16 (a1, q2, fig1) © Iamway | Dreamstime.com / p.41 (a1, hot spring) © Igor Zakharevich | Dreamstime.com / p.50 (a1, q2) © Ihor Hvozdetskij | Dreamstime.com / p.44 (a3, q5, fig2) © Ilfede | Dreamstime.com / p.22 (a2, q3, fig2) © Ilkercelik | Dreamstime.com / p.17 (a1, q1, fig4) © Industryviews | Dreamstime.com / p.22 (a2, q3, fig4)
© Irina Foto | Dreamstime.com / p.45 (a4, q3, burning candle) © Ivan Serebryannikov | Dreamstime.com / p.32 (a1, q1, coins) © Jan Brons | Dreamstime.com / p.46 (a5, fig1) © Jecky Lim | Dreamstime.com / appendix 3, Reading to Learn (Singapore Changi Airport) © Jess Yu | Dreamstime.com / p.23 (a3, Reading to Learn, Hong Kong Science Park) © Leung Cho Pan | Dreamstime.com / p.17 (a1, Life Link, Castle Peak Power Station) © Meryll | Dreamstime.com / p.22 (a2, q3, fig6) © Mikumistock | Dreamstime.com / p.61 (a3, q3, child on water slide) © Mohamad Faizal Ramli | Dreamstime.com / p.41 (a1, q2, fig2) © Monika Adamczyk | Dreamstime.com / p.37 (a5, q2, fig3) © Moxumbic | Dreamstime.com / appendix 4, Reading to Learn (food waste after breakdown) © Nataliya Hora | Dreamstime.com / p.22 (a2, q3, fig5) © Neip62 | Dreamstime.com / p.33 (a2, q1, damaged wires) © Neurobite | Dreamstime.com / p.70 (a4, fig1) © Nigel Hoy | Dreamstime.com / appendix 4, Reading to Learn (wolf) © Notkoo2008 | Dreamstime.com / p.72 (a5, astronaut, satellite, detector artwork) © Nuttawut Uttamaharad | Dreamstime.com / p.68 (a3, space background) © Oblachko | Dreamstime.com / p.69 (a3, q2, fig2) © Oksana Kazykina | Dreamstime.com / p.42 (a2, q1 (2), fig1) © Ozgur Coskun | Dreamstime.com / unit 7 cover (rust inside frying pan)
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