New Science eTextbook 4A (UPC)

Acknowledgements

We would like to thank the following for permission to reproduce copyright materials.

a = activity q = question fig = figure

© Peter Mautsch / Maranso Gmbh | Dreamstime.com / p.8 (a5, q2, fig1) © Peter Zijlstra | Dreamstime.com / p.53 (a2, q1, fig3, cut lychee) © Photka | Dreamstime.com / p.34 (a4, cactus) © Pindiyath100 | Dreamstime.com / p.8 (a5, q2, fig3); p.15 (a3, q2, winter in Hong Kong); p.20 (a3, q2, beach) © Piotr Adamowicz | Dreamstime.com / p.30 (a2, q1, fig1, polar bear’s fur) © Prasit Rodphan | Dreamstime.com / p.60 (a2, q6, fig3) © Revensis | Dreamstime.com / appendix 3, Reading to Learn (rice) © Richard Carey | Dreamstime.com / p.57 (a1, q2, fig3, sea turtle) © Ritu Jethani | Dreamstime.com / p.58 (a2, q1 & q2, fig6, fold-out page bottom) © Robin Van Olderen | Dreamstime.com / p.34 (a4, fig4) © Robkna | Dreamstime.com / p. 8 (a5, q2, fig2) © Rozenn Leard | Dreamstime.com / p.20 (a3, q3, footage of bushfire in Australia) © Ruslanchik | Dreamstime.com / p.63 (a4, q3, fig4) © Sabina Ac | Dreamstime.com / p.57 (a1, q1, fig1) © Sandra Allen | Dreamstime.com / p.21 (a3, q8, fig3) © Scaliger | Dreamstime.com / unit 4 cover (toy clinic) © Seadam | Dreamstime.com / appendix 2, Reading to Learn (coral polyps) © Sensvector | Dreamstime.com / p.34 (a4, temperate grassland background); p.44 (a4, q1, grassland background) © Siarhei Nosyreu | Dreamstime.com / p.44 (a4, q1, flowers) © Siimsepp | Dreamstime.com / p.7 (a4, q1, fig6 & q2, fig2) © Simon Thomas | Dreamstime.com / unit 3 cover (apple) © Slogger | Dreamstime.com / p.52 (a1, q6, flowers of corn) © Slowmotiongli | Dreamstime.com / p.61 (a3, q1, fig2) © Somchai Rak-in | Dreamstime.com / p.53 (a2, q1, fig3, lychee tree) © Somkiat Atthajanyakul | Dreamstime.com / p.34 (a4, fig1) © Steve Byland | Dreamstime.com / p.29 (a1, fig5, rattlesnake) © Stockagogo | Dreamstime.com / p.52 (a1, q5, fig2) © Stormboy | Dreamstime.com / p.29 (a1, fig4, tropical rainforest) © Tatjana Romanova | Dreamstime.com / p.63 (a4, q3, fig2) © Thawats | Dreamstime.com / p.57 (a1, q2, fig1, butterfly) © Thekaikoro | Dreamstime.com / unit 3 cover (dotted and lined background) © Timescape | Dreamstime.com / p.57 (a1, q2, fig2, frog eggs) © Toa555 | Dreamstime.com / p.22 (a4, q1, fig1) © Stu Porter | Dreamstime.com / p.59 (a2, q4, fig4) © Szefei | Dreamstime.com / p.60 (a2, q6, fig2) © Todd Lipsky | Dreamstime.com / p.40 (a1, q2, fig12) © Tsui Shan So | Dreamstime.com / p.44 (a4, q1, giraffe) © Valentin Garcia | Dreamstime.com / p.8 (a5, Learn More, fossil) © Verastuchelova | Dreamstime.com / unit 3 cover (bee); p.57 (a1, q2, fig2, frog) © Viktarm | Dreamstime.com / p.53 (a2, q2, fig2) © Vlad Georgescu | Dreamstime.com / unit 1 cover (rocks) © Vladimir Melnik | Dreamstime.com / p.53 (a2, q1, fig4, mango tree) © Vladvitek | Dreamstime.com / p.22 (a4, q1, fig4) © Waldemar Dabrowski | Dreamstime.com / p.61 (a3, q2, fig2) © Warangkana Charuyodhin | Dreamstime.com / p.63 (a4, q3, fig1) © Warin Watkeaw | Dreamstime.com / p.17 (a1, hand-held smartphone) © Wenjunchu | Dreamstime.com / p.56 (a4, camel's foot tree) © Willtu | Dreamstime.com / p.58 (a2, q3, king penguin mother) © Wirestock | Dreamstime.com / appendix 4, Reading to Learn (sweet wormwood) © Wkruck | Dreamstime.com / p.58 (a2, q1 & q2, fig4, fold-out page) © Wong Sze Yuen | Dreamstime.com / p.60 (a2, q6, fig1) © Wuttichai Nanchaikan | Dreamstime.com / p.52 (a2, q1, fig1) © Xishuiyuan | Dreamstime.com / unit 3 cover (flowers) © Yasonya | Dreamstime.com / p.53 (a2, q1, fig4, cut mango) © Zdeněk Mačát | Dreamstime.com / p.58 (a2, q1 & q2, fig5, fold-out page bottom) © Zorandim | Dreamstime.com / p.31 (a2, q4, hedgehog) © Zz3701 | Dreamstime.com / p.56 (a4, white Bauhinia) © Петлин Дмитрий | Dreamstime.com / p.57 (a1, q1, fig3) AFP / Gety Images / appendix 4, Reading to Learn (Tu Youyou) Agriculture Fisheries and Conservation Department, Government of the HKSAR /p.46 (a5, fig1 & fig2); appendix 1, Reading to Learn (fig2 & fig4) Breck P. Kent / Shuterstock.com / p.55 (a4, q3, fossil of gingko tree leaf) China News Service / appendix 3 (Yuen Longping) Christopher Wood / Shuterstock.com / p.30–31, a2, polar region) Department of Health, Government of the HKSAR / unit 4 cover (‘Don’t Wait Get a Jab Keep Flu Away’ poster & ‘Maintain Cough Manners’ poster) Elaine Oliver / Shuterstock.com / p.35 (a4, fig7) Environment and Ecology Bureau, Government of the HKSAR / p.23 (a4, Humanities Link- up, Low Carbon Living Calculator) Hong Kong Observatory, Government of the HKSAR / p.17 (a1, current weather screenshot); p.20 (a3, q1, Very Hot Weather Warning push notifications) Hong Kong Space Museum / p.13 (a2, More to Explore, fig1) Hong Kong University of Science and Technology / p.73 (a5, q2, fig2) Information Services Department, Government of the HKSAR / p.73 (a5, q2, fig1 & fig3 & fig4) iStock.com / mastapiece / p.14 (a3, q2, winter in Melbourne, Australia) iStock.com / ymgerman / p.15 (a3, q2, summer in Melbourne, Australia) Jackson Stock Photography / Shuterstock.com / p.45 (a4, q2, fig3) Jockey Club Museum of Climate Change, HKU / p23 (a4, More to Explore, fig4, Polar Gallery) National Aeronautics and Space Administration / unit 1 cover (Sun); p.20 (a3, q4, fig1 & fig2) Ocean Park Hong Kong / p.30 (a1, q1, fig2, walrus); p.33 (a3, q2, fig2, meerkat) Sketched Images / Shuterstock.com / p.45 (a4, q2 & q3, forest background) Zulashai / Shuterstock.com / p.54 (a3, q2, fig2) iStock.com / avstraliavasin / p.59 (a2, q4, fig6) iStock.com / cjwhitewine / p.50 (a1, q2, fig2)

© Angus Lau / appendix 1, Reading to Learn (fig6) © 99 Art | Dreamstime.com / unit 1 cover (galaxy background) © Abdul Rahman Mat | Dreamstime.com / p.45 (a4, q2 & q3, fig1) © Adisa | Dreamstime.com / p.40 (a1, q2, fig1); p.50 (a1, q1, fig2) © Alex459 | Dreamstime.com / p.50 (a1, q2, fig3) © Alexey Sedov | Dreamstime.com / p. 30 (a2, q1, fig1, polar bear) © Aliaksandr Mazurkevich | Dreamstime.com / unit 3 cover (apple tree) © Altaoosthuizen | Dreamstime.com / p.37 (a5, black-winged stilt) © Amineimo | Dreamstime.com / p.54 (a3, q2, fig3) © Anankkml | Dreamstime.com / p.28 (a1, fig2, deer); p.29 (a1, fig4, tiger) © Andrei Stepanov | Dreamstime.com / p.28–29 (a1, fig3, Arctic Fox) © Andri Damanik | Dreamstime.com / p.57 (a1, q2, fig3, sea turtle eggs) © Anest | Dreamstime.com / p.52 (a1, q6, corn) © Anke Van Wyk | Dreamstime.com / p.33 (a3, q2, fig3, African spurred tortoise) © Anna Kucherova | Dreamstime.com / p.59 (a2, q4, fig2) © Baramee Thaweesombat | Dreamstime.com / p.60 (a2, q6, fig4) © Belka | Dreamstime.com / p.40 (a1, q2, fig4) © Bidouze Stephane | Dreamstime.com / p.35 (a4, fig5); p.45 (a4, q2 & q3, fig2) © Bruno ismael da silva Alves | Dreamstime.com / p.22 (a4, q1, fig2) © Chengnan | Dreamstime.com / p.21 (a3, q8, fig1) © Cherezoff | Dreamstime.com / p.34 (a4, fig2) © Cheryl Davis | Dreamstime.com / p.59 (a2, q4, fig5) © Craig Hanson | Dreamstime.com / p.55 (a4, Reading to Learn, rice) © Cristina Bernhardsen | Dreamstime.com / p.29 (a1, fig5, desert) © Cynoclub | Dreamstime.com / p.61 (a3, q2, fig1) © Cynthia A. Jones | Dreamstime.com / p.45 (a4, More to Explore, fig1) © Damian Olivera Bergallo | Dreamstime.com / p.58 (a2, q1 & q2, fig6, fold-out page) © Dario Lo Presti | Dreamstime.com / p.8 (a5, Back to the Past, fig2) © Dashark | Dreamstime.com / p.36 (a5, black-faced spoonbill) © Dasya11 | Dreamstime.com / p.58 (a2, q1, fig3) © David Steele | Dreamstime.com / p.32–33 (a3, desert background) © Dejavu Designs | Dreamstime.com / p.32 (a3, q2, fig1, camel’s eye and eyelashes) © Digoarpi | Dreamstime.com / unit 3 cover (apple flower) © Dmitry Rukhlenko | Dreamstime.com / p.50 (a1, q1, fig1) © Duncan Noakes | Dreamstime.com / p.41 (a1, q2, fig5) © Egon Zitter | Dreamstime.com / p.35 (a4, fig8) © Evgeny Karandaev | Dreamstime.com / p.42 (a2, q1, sea background) © Fourleaflover | Dreamstime.com / unit 1 cover (Earth surface) © Frenta | Dreamstime.com / unit 1 cover (Earth’s mantle and core) © Galina Samoylovich | Dreamstime.com / p.54 (a3, q2, fig1) © Getsaraporn Thammason | Dreamstime.com / p.52 (a2, q1, fig2) © Goce Risteski | Dreamstime.com / p.59 (a2, q4, fig1) © Gornostaj | Dreamstime.com / p.58 (a2, q1 & q2, fig4, fold-out page bottom) © Hamizan Yusof | Dreamstime.com / appendix 3, Reading to Learn (fig1) © Hedrus | Dreamstime.com / p.44 (a4, q1, lion) © Hiroshi Tanaka | Dreamstime.com / unit 3 cover (apple tree seedling) © Icefront | Dreamstime.com / p.40 (a1, q2, fig13) © Ijdema | Dreamstime.com / p.8 (a5, Back to the Past, fig1) © Innaastakhova | Dreamstime.com / p.57 (a1, q1, fig4) © Isselee | Dreamstime.com / p.28 (a1, q1, fig1, heron); p.40 (a1, q2, fig11); p.41 (a1, q2, fig7 & fig14) © Istvan Balogh | Dreamstime.com / p.55 (a4, q3, gingko tree) © Jennifer Davis | Dreamstime.com / p.52 (a1, q5, fig1) © Jhvephotos | Dreamstime.com / p.61 (a3, q1, fig1) © Johannes Gerhardus Swanepoel | Dreamstime.com / p.44 (a4, q1, vulture) © Johannesk | Dreamstime.com / p.40 (a1, q2, fig2) © John Kasawa | Dreamstime.com / p.40 (a1, q2, fig9) © Jolanta Wojcicka | Dreamstime.com / appendix 2, Reading to Learn (coral reef) © Jukka Palm | Dreamstime.com / p.36 (a5, Eurasian wigeon) © Kaewmanee Saekang | Dreamstime.com / unit 3 cover (rabbits) © Katarzyna Bialasiewicz | Dreamstime.com / unit 4 cover (children’s room) © Katerina Kovaleva | Dreamstime.com / p.54 (a3, q2, fig4) © Katoosha | Dreamstime.com / p.21 (a3, q8, fig2) © Kevin Brown | Dreamstime.com / p.58 (a2, q1, fig1) © Khunaspix | Dreamstime.com / p.57 (a1, q1, fig2) © Lefteris Papaulakis | Dreamstime.com / p.45 (a4, More to Explore, fig2) © Liumangtiger | Dreamstime.com / p.41 (a1, q2, fig8) © Lukasz Czajkowski | Dreamstime.com / p.44 (a4, q1, deer) © Mandimiles | Dreamstime.com / p.59 (a2, q4, fig3) © Manuel Océn | Dreamstime.com / p.58 (a2, q1 & q2, fig5, fold-out page) © Marc Witte | Dreamstime.com / p.45 (a4, More to Explore, fig3) © Mastersviat | Dreamstime.com / p.34 (a4, fig3) © Matee Nuserm | Dreamstime.com / p.57 (a1, q2, fig1, butterfly eggs) © Matthijs Kuijpers | Dreamstime.com / p.33 (a3, q2, fig4, jerboa) © Michal Bednarek | Dreamstime.com / p.28 (a1, fig2, temperate grassland) © Mogens Trolle | Dreamstime.com / p.44 (a4, q1, cheetah) © Monkey Business Images | Dreamstime.com / p.60 (a2, q6, fig5) © Montree Nanta | Dreamstime.com / p.7 (a4, q1, fig2 & fig4, q2, fig1 & fig3) © Naluphoto | Dreamstime.com / p.40 (a1, q2, fig10) © Naruemon Bulwan | Dreamstime.com / p.40 (a1, q2, fig3) © Natalya Aksenova | Dreamstime.com / p.58 (a2, q1, fig2) © Nattawut Sakit | Dreamstime.com / p.53 (a2, q2, fig1) © Nila Newsom | Dreamstime.com / p.32 (a3, q2, fig1, camel’s foot) © Noppanun Kunjai | Dreamstime.com / p.45 (a4, q2, fig4) © Olena Vatsyk | Dreamstime.com / unit 3 cover (puppies) © Ondřej Prosický | Dreamstime.com / p.28–29 (a1, fig3, polar region)

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