Impressum

The publisher confirms that the textbook complies with the middle school national curriculum and the requirements for study literature established by the Minister of Education and Research.

Textbook authors

Kersti Jankovski (1.8–2.7; 3.9–4.4), Rein Kuresoo (1.1–1.7; 2.8–3.8; 4.5–4.10)

Task authors

Kersti Jankovski (1.8–2.7; 3.9–4.4), Rein Kuresoo (1.1–1.7; 2.8–3.8; 4.5–4.10), Tiia Kuresoo (1.1–1.7; 2.8–3.8; 4.5–4.10)

Reviewed by

Pilvi Tauer, Kairi Käiro, Tiit Lukki, Helene Urva, Kaarin Koosa, Ann Laheäär, Sven-Erik Enno

Compiled and edited by

Liisi Kasuk, Brit Peensoo

Language editors

Annika Vesi, Kaire Luide, Kärt Talsi

Translator

Luise Türkson

English language editor

Mira Anne Martini

Illustrated by

Inga Kalistru, Milvi Torim, Kalev Luup, Kertu-Liina Karjus, Kristina Reineller

Maps made by

Krista Mölder, Liisi Kasuk

Designed by

Kalev Luup

Cover designed by

Anne Linnamägi

Digitized by

Star Cloud OÜ

Videos dubbed by

David O`Brock

The authors of the photos and videos are in the order of their first appearance.

Authors of the photos and videos used in the textbook

YDP – ch. 1.2 (animations of atoms-molecules and solutions), 1.4 (gas animation), 1.5 (lake cooling animation), 3.4 (high and low pressure area animation), 3.8 (greenhouse effect animation), 4.2 (salinity animation);

Shutterstock – ch. 1.2 (tap video), 1.4 (oil video), 1.5 (water boiling video), 1.6 (dripping water, water strider, plant leaf, parrot videos), 2.4 (Ahja river video), 2.8 (fish breathing video), 2.12 (water strider video), 3.7 (hang glider video), 4.7 (jellyfish and seal videos);

Yongyut Kumsri / Shutterstock – ch. 1.3 (ice cave);

Ly Rammo – ch. 1.3 (hot spring video);

Heiki Savitsch – ch. 1.4 (gas, solid and liquid molecule movement animations);

Unknown author / Wikimedia Commons – ch. 1.5 (bridge joint);

Liisi Kasuk – ch. 1.6 (paperclip experiment photos);

Rein Kuresoo – ch. 1.6 (oil and water on glass), 1.7 (glass), 2.8 (newt), 2.11 (lake Verevi, filamentous algae), 2.12 (backswimmer), 2.14 (arrowhead, arrowhead close-up), 3.2 (balloon experiment), 3.3 (plastic bag experiment photos), 4.5 (extraction of bladderwrack), 4.8 (common gull);

Margus Ansu / Postimees / Scanpix – ch. 1.8 (Emaläte cave and spring), 2.2 (baseflow);

Marko Vainu / Wikimedia Commons – ch. 1.8 (Allikukivi spring);

Iifar / Wikimedia Commons – ch. 1.8 (erupting spring);

Aavo Teder – ch. 1.8 (karst illustration);

Corbis / Vida Press – ch. 1.9 (women collecting water), 2.3 (Emajõgi, aerophoto), 2.9 (Amazon water lily), 2.15 (caddisfly, salmon), 4.7 (ringed seal);

Ivo Kruusamägi / Wikimedia Commons – ch. 1.9 (Linnamäe hydroelectric power plant);

ERR – ch. 1.9 (drinking water and wastewater treatment videos), 2.2 (high water video), 2.16 (white-throated dipper and kingfisher videos), 3.8 (air pollution video), 3.9 (weather and weather observatory videos), 4.5 (cyanobacteria video), 4.10 (marine litter video);

Epp / Wikimedia Commons – ch. 1.9 (wheel well);

Värska Vesi – ch. 1.9 (Värska well);

Tiina Kõrtsini / Õhtuleht – ch. 1.9 (Paljassaare water treatment plant);

NASA – ch. 2.1 (Nile delta), 3.9 (satellite image, air masses image with arrows), 4.1 (satellite image);

Maasaak / Wikimedia Commons – ch. 2.2 (high waters);

Maa-amet – ch. 2.3 (ortophoto), 2.6 (Vooremaa topographic map), 2.7 (lake Vagula on a map), 4.1 (Väinameri on a map);

OÜ Matkajuht – ch. 2.4 (rapid video);

Hannu / Wikimedia Commons – ch. 2.4 (Piusa river);

Arne Ader – ch. 2.4 (river Emajõgi), 2.6 (lake Pühajärv, lake Sutlepa meri, Vooremaa), 4.4 (Paldiski), 4.8 (bird flock);

.waldec/Flickr – ch. 2.4 (flooding in Soomaa);

Heiko Kruusi – ch. 2.4 (Jägala waterfalls);

Vaido Otsar / Wikimedia Commons – ch. 2.5 (lake Rõuge Suurjärv);

Dj Capricorn / Wikimedia Commons – ch. 2.5 (lake Järve);

Erke Härma-Ääro (video), KeffyStay/Freesound (sound) – ch. 2.6 (lake Viljandi video);

Tanel Mazur – ch. 2.6 (Narva reservoir);

A. Palu / Wikimedia Commons – ch. 2.7 (lake Porkuni);

Zosma / Wikimedia Commons – ch. 2.7 (closed lake);

Meky / Wikimedia Commons – ch. 2.7 (Nohipalu Valgjärv);

Sven-Erik Enno / Wikimedia Commons – ch. 2.7 (lake Väiku-Palkna);

Pixabay – ch. 2.8 (frog, fish and beaver videos), 2.16 (beaver video), 3.7 (bird video), 3.12 (cirrus, cumulus, cumulonimbus and stratus cloud videos);

Estormiz / Wikimedia Commons – ch. 2.8 (ringed seal);

BerndH / Wikimedia Commons – ch. 2.9 (yellow waterlily);

Christian Fischer / Wikimedia Commons – ch. 2.9 (broad-leaved pondweed), 2.11 (Canadian waterweed);

Kristian Peters / Wikimedia Commons – ch. 2.9 (waterweed);

Aimaina hikari / Wikimedia Commons – ch. 2.11 (sedges);

AnRo0002 / Wikimedia Commons – ch. 2.11 (willows);

Bernd Haynold / Wikimedia Commons – ch. 2.11 (club-rush);

Joshua Mayer / Flickr – ch. 2.12 (whirligig beetle);

Reinhard Weidlich / Carabus-Film.de / www.natur-in-nrw.de – ch. 2.12 (the great diver video);

Anna-Kristiina Kruus – ch. 2.14 (water horsetail from afar);

Boldie / Wikimedia Commons – ch. 2.15 (freshwater pearl mussel);

Amada44 / Wikimedia Commons – ch. 2.15 (mayfly larvae);

Erke Härma-Ääro – ch. 3.4 (wind formation animation);

Albert Truuväärt / Linnaleht – ch. 3.8 (electric car);

Terje Lepp / EPL – ch. 3.8 (gas busses);

Sven-Erik Enno – ch. 3.9 (weather observatory square, weather observatory monitor), 3.13 (rain gauge, measuring rod);

EMHI – ch. 3.9 (snow thickness and fire hazard maps);

Scanpix – ch. 3.9 (Siberia);

Sünne Lehtmets – ch. 3.12 (cloud formation animation);

Polba Dadpur / iStockphoto – ch. 3.13 (Cherrapunji);

Olev Mihkelmaa / Wikimedia Commons – ch. 4.1 (Kakrarahu);

Hiiumaamudeliklubi / Wikimedia Commons – ch. 4.1 (islets in Väinameri);

Tiit Lauri – ch. 4.1 (piled ice);

Anto Aasa – ch. 4.3 (lilac blooming, birch budding maps);

Henn Soodla / Pärnu Postimees / Scanpix – ch. 4.3 (ice road);

Ülle Kollist – ch. 4.5 (Cladophora), 4.7 (seashells), 4.9 (sea sandwort, sea lyme grass);

Stemonitis / Wikimedia Commons – ch. 4.5 (bladderwrack);

Panek / Wikimedia Commons – ch. 4.5 (Furcellaria);

Kalev Luup – ch. 4.6 (Baltic herring);

Krista Mölder – ch. 4.6 (sprat);

Tiit Hunt / Wikimedia Commons – ch. 4.6 (flounder);

Heather Paul / Flickr – ch. 4.8 (common eider);

free_photos/Flickr – ch. 4.9 (sea aster);

Peeter Langovits / Postimees / Scanpix – ch. 4.10 (cleaning up the oil spill).

Authors of photos used in the exercise stack

James Lindsey / Wikimedia Commons – ch. 2.12 and 4.7 (horse-leech);

Aung / Wikimedia Commons – ch. 4.7 (Baltic clam);

Kloderowski / Wikimedia Commons – ch. 4.7 (Saduria entomon);

Darkone / Wikimedia Commons – ch. 4.7 (blue mussel).

The rest of the photos in both the textbook and the exercise stack are from Shutterstock Photo Bank.

The publisher has tried to find the copyright holders of all illustrations and apologizes for any errors or omissions. If you have any complaints, please contact info@avita.ee.