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EOES 2025

EOES 2025 was hosted by the Faculty of Sience at University of Zagreb , where the competitors had access to the laboratories for their assignments.

As previous years it was a joyful reunion for many of the mentors and an unforgettable event for the youngsters from 23 European Union countries and one guest team from Ukraine.

Once again the organisers managed to pair some nice experiments with two original themes: Waters of Croatia: From the Emerald Rivers to the Deep Blue Sea and Chemistry, Physics Biology - Tied by Time and Change.
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TASK 1

Subtitle
In this task, the participants faced questions about freshwater microfauna and had to determine water purity based on the presence of certain invertebrates.

They also had to determine the salt concentration of the water in salt pans and find out which salt plants enriched the extracted salt with iodine.
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TASK 2

Subtitle
Chemical reactions, whether they take place in a split second or over millions of years, reshape matter.

Biological systems evolve, grow and adapt through time-bound processes.

Physical forces drive changes from the smallest atomic movements to the vast motions of galaxies.

In all sciences, time and change are threads that connect discoveries, explain patterns and reveal the dynamic nature of life and the universe.

In this second assignment, this was beautifully demonstrated through a number of biological, chemical and physical experiments.
THUMBS UP!

Thumbs up for Tajana Begović, chair of EOES 2025 and for the members of the Organizing and Scientific committee for these successful week and challenging tasks.

Kudos also for the Faculty staff and the numerous volunteers.

Do not forget to take a look at our dedicated Media page, where you can find numerous photos and some videos from EOES 2025.
ORGANIZING COMMITTEE

Head:
  • Andreja Lucić
Members:
  • Katarina Caput Mihalić
  • Petra Cvjetko
  • Renata Horvat
  • Romana Gračan
  • Davor Kovačević
  • Danijel Namjesnik
  • Dubravka Sandev
  • Danijela Giljević
  • Ivan Martinić
  • Ivan Ivić
  • Ksenija Fučkar Reichel
  • Branimir Bertoš
SCIENTIFIC COMMITTEE

Head:
  • Mario Basletić

Experts for Biology:
  • Tomislav Ivanković
  • Jasna Hrenović
  • Blanka Dadić
  • Renata Matoničkin Kepčija
  • Mirela Sertić Perić

Experts for Chemistry:
  • Tin Klačić
  • Vesna Petrović Peroković
  • Mateja Pisačić
  • Marijana Pocrnić
  • Đani Škalamera
  • Darko Vušak

Experts for Physics:
  • Mario Basletić
  • Nikolina Novosel
  • Nikola Poljak

Independent Scientific Expert:
  • Emiel de Kleijn
FACULTY STAFF

Andreja Zeba, Barbara Šepac Novotni, Barica Škrinjarić, Damjana Levačić, David Dianežević, Dino Kuzman, Dorian Loknar, Đurđica Novoselec, Edi Topić, Filip Kučas, Fran Rebrina, Gaj Keresteš, Helena Križan, Irena Crnogaj, Ivor Vavra Plavšić, Jasmina Jukić, Karla Ostojić, Karlo Miškec, Kristina Nikolić, Leda Divjak, Lucija Brtan, Maja Novosel, Marija Bučar, Marina Bertek, Mario Bišćan, Marko Pužar, Marta Frlin, Martina Galeković, Matej Faller, Matej Vucić, Mateja Jagić, Mirjana Murat, Mirta Žagar, Nadica Vincek, Nino Berislavić, Pavel Ankon, Tomislav Mamić, Valentina Zagorec, Zdenka Ivančić.
Volunteers

Ana Bajlović, Andrija Ninić, Anja Žiganto, Antonela Vranješ, Antonio Eršegović, Antun Habajec, Barbara Jozić, Barbara Mustapić, Daniel Jukić, Dolores Skolan, Dora Međimorec, Ema Klarić, Ema Kovačić, Ema Novak, Everi Kopač, Filip Čutura, Filip Landek, Filip Margetić, Fran Miletić, Iskra Hrnčić, Ivana Kepčija, Jan Pavić, Jasmin Jašarević, Josip Mikulić, Karla Hajdarović, Karlo Domijan, Karlo Maksimović, Karlo Stašić, Kim Radešić, Lana Krog, Lana Lokas, Lea Orlić, Leona Hajrizi, Leona Štorga, Lucija Cindrić, Lučić Martina, Magdalena Klarić, Marija Ferčec, Marko Ercegović, Marko Preočanin, Nina Turkalj, Olga Jerković Perić, Petra Balenović, Petra Grubišić, Petra Vujnovic, Robert Markulin, Stela Tonner, Sven Marinac, Tamara Papić, Tia Dominić, Vito Mijailović, Danijel Pilaj.
SYNOPSIS 
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In these tabulated pages you will find an overview of those items, which are relevant for the event.

COUNTRIES 
Following countries participated in EOES 2023

AUSTRIA

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Team A: Carla Bachinger, Samuel Michenthaler, Katharina Vonach
Team B: Katharina Pichler, Alexander Schachner, Elias Szinovatz
Mentor Biology: Christina Lassnig
Mentor Chemistry: Leonard Caliskan
Mentor Physics: Elias Hohl
Country Coordinator: Elias Hohl
Observer: Christian Koller

BELGIUM

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Team A: Joana Gonçalves Gomes, Benjaminas Krutejavas-Mazuras, Nicolas Matz
Team B: Leander Gabriel, Daniel Ognyanov, Otto Tacquenier
Mentor Biology: Louis De Vos, Victor Rasquin
Mentor Chemistry: Alexandre Marée, Victor Rasquin
Mentor Physics: Bernadette Hendrickx
Country Coordinator: Victor Rasquin

BULGARIA

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Team A: Yordan Petkov, Teodor Petrov, Damyan Ivanov
Team B: Rayan Kamarinchev, Melih Osman, Teodor Kussev
Mentor Biology: Kalina Pachedzhieva
Mentor Chemistry: Vladimir Tzetkov
Mentor Physics: Christina Andreeva
Country Coordinator: Christina Andreeva
Observer: Denitsa Teofanova

CROATIA

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Team A: Ana Piroš, Ivo Šimić, Marta Žuvić
Team B: Petar Brajković, Borna Lebinac Milinović, Ivan Udovičić
Team C: Luka Cerutti, Adrian Gansel, Matej Zajec
Mentor Biology: Bruno Komazec
Mentor Chemistry: Tea Juračić
Mentor Physics: Karolina Matejak Cvenić
Country Coordinator: Karolina Matejak Cvenić

CYPRUS

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Team A: Alexandros Samoutis, Stelios Paphitis, Dimitris Neophytou
Team B: Omiros Neofytides, Kyriakos Papas, Nikolas Roussos
Mentor Biology: Nikolas Genethliou
Mentor Chemistry: Georgios Miliotis
Mentor Physics: Georgios Tsalakou
Country Coordinator: Georgios Miliotis

CZECH REPUBLIC

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Team A: Anita Vaceková, Jan Beránek, Marek Roll
Team B: Vít Obdržálek, Nina Kunštátská, Jan Paloncý
Mentor Biology: Jan Černý
Mentor Chemistry: Jan Kotek
Mentor Physics: Jan Kříž
Country Coordinator: Jan Kříž

DENMARK

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Team A: Storm Faarup Christensen, Jonas Skou Nielsen, Elias Møller Overbeck
Team B: Frederik Kvolbæk Pedersen, Marcus Selmer Pedersen, Rasmus Holmgaard Vestergaard
Mentor Biology: Hans Marker
Mentor Chemistry: Tine Christiansen
Mentors Physics: Lise Odgaard Gade
Country Coordinator: Richard Falbe Cleyton
Observer: Søren Ernst Blanke

ESTONIA

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Team A: Jan Hendrik Järvemets, Richard Olev, Silvia Nafthal
Team B: Jasper Vähk, Kristofer Torokoff, Joel Rehe,
Mentor Biology: Merilis Moppel
Mentor Chemistry: Martin Rahe
Mentor Physics: Kaarel Kivisalu
Country Coordinator: Kaarel Kivisalu

FINLAND

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Team A: Emil Laine, Kasper Ilchenko, Iina Lilius
Team B: Felix Pirhonen, Ilona Seppälä, Inka Loukovaara
Mentor Biology: Minni Aalto
Mentor Chemistry: Nina Salminen
Mentor Physics: Jukka Sorjonen
Country Coordinator: Nina Salminen

FRANCE

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Team A: Benjamin Pittet, Louis Vicente, Eliott Lebrun
Team B: Laura Pujalte Chansavang, Maxence Van Poucke, Théodore Crassous
Mentor Biology: Hélène Flochon
Mentor Chemistry: Benjamin Presson
Mentor Physics: Antoine Chevereau
Country Coordinator: Hélène Flochon

GERMANY

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Team A: Lilia Theresa Dieterlen, Linus Cebulla, Daris Mohammadzadeh
Team B: Marie Lautenschlager, Niklas Volodin, Pranav Arun
Mentor Biology: Annabel Maisl
Mentor Chemistry: Jan Kruse
Mentor Physics: Konstantin Schwark
Country Coordinator: Burkhard Schroeter

GREECE

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Team A: Charalampos Meramveliotakis, Petros Vasilikogiannakis, Anna Askoxylaki,
Team B: Zoi Laou, Apostolos Vasilikos, Angelos Gkoritsas
Mentor Biology: Evangelos Charatsis
Mentor Chemistry: Antonios Margaritis
Mentor Physics: Christos Georhopoulos
Country Coordinator: Maria Tsakiri
Observer: Xenofon Rafios

HUNGARY

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Team A: Tamás István Bense, András Csapó, Botond Ozsváth
Team B: Artúr Bíró, János Elek, Dorottya Szabó
Mentor Biology: Ádám Zoltán Seres
Mentor Chemistry: Attila Jancsó
Mentor Physics: Péter Vankó
Country Coordinator: Péter Vankó
Observer: Tamás Sarkadi

IRELAND

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Team A: Rowan Kelly, Prayag Ratheeahbabu, Tobi O’Sullivan
Team B: Xelaya Anthony, Marné Malan, Yuhan Xue
Mentor Biology: Keith Rochfort
Mentor Chemistry: Róisin Byrne
Mentor Physics: Caoimhe O'Loughlin
Country Coordinator: Róisin Byrne

ITALY

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Team A: Giovanni Pozzebon, Alessandro De Lazzari, Alessio Casaburo,
Team B: Riccardo Zille, Pietro Cargnello, Matteo Vecchiato
Mentor Biology: Elisa Corteggiani Carpinelli, Manuela Granella
Mentor Chemistry: Eva Zsuzsanna Bencze
Mentor Physics: Carmelita Cipollone
Country Coordinator: Carmelita Cipollone
Observer: Francesco Gobbo
Observer: Stefano Montagni

LATVIA

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Team A: Markuss Kalenda, Kārlis Zalāns, Adrians Dacko
Team B: Agnese Kataja, Kristians Koržeņevskis, Ričards Ozols
Mentor Biology: Ilze Izabella Dindune
Mentors Chemistry: Mihails Haļitovs & Līga Prieciņa
Mentor Physics: Zane Rekšņa
Country Coordinator: Mihails Haļitovs

LITHUANIA

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Team A: Robertas Juknevičius, Kotryna Mieldažytè
Team B: Miglè Balčetytè, Aušrinè Černiutè, Augustinas Jerešiūnas
Mentor Biology: Paulius Tamošiūnas
Mentor Chemistry: Kęstutis Baltakys
Mentor Physics: Tomas Kivaras
Country Coordinator: Paulius Tamošiūnas

LUXEMBOURG

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Team A: Nicolas Bourg Rodrigues, Adrian Mai, Esther Franzen
Team B: Len Bamberg, Christine Aben, Charles Ralinger
Mentor Biology: Caroline Steffen
Mentor Chemistry: Gilles Backes
Mentor Physics: Jacques Weydert
Country Coordinator: Jeff Kohnen
Observer: Liss Weber

THE NETHERLANDS

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Team A: Daniel Vleugel, Servas Bulthuis, Fosse Bekker
Team B: Sebas Benes, Pieter van Haselen, Lucas Duynisveld
Mentor Biology: Anne de Rond
Mentor Chemistry: Tom Bloemberg
Mentor Physics: Andre Eppink
Country Coordinator: Jeroen Sijbers
Observer: Emiel de Kleijn

PORTUGAL

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Team A: David Montenegro, Leonardo Sousa, Pedro Oliveira,
Team B: José Figueiredo, António Queiroz, João Castelo
Mentor Biology: Pedro Oliveira
Mentor Chemistry: José Esperança
Mentor Physics: João Cruz
Country Coordinator: Catarina Ramos

SLOVENIA

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Team A: Izadora Kopač, Niko Habinc, Primož Markovič
Team B: Tian Kobal, Aleksander Jotanović, Andraž Čadež,
Mentor Biology: Katja Stopar
Mentor Chemistry: Matej Huš
Mentor Physics: Anita Nose
Country Coordinator: Katja Stopar

SPAIN

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Team A: Insaf Ahlal Benmoulay, Gayane Safaryan, Dounia Maftahe
Team B: Carla Acosta García, Rubén Lago Blanco, David Lago Alonso
Mentor Biology: Pablo Blanco Penelas
Mentor Chemistry: David José Meseguer Pardo
Mentor Physics: Maria Teresa Garcia Segura
Country Coordinator: David José Meseguer Pardo

SWEDEN

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Team A: Elliot Fransson, Juli Ju, Maximilian Mazya
Team B: Milo Hannerz, Elvin Lundh Forsberg, Alexander Stjärnström
Mentor Biology: Birgitta Sang
Mentor Chemistry: Markus Nilsson
Mentor Physics: Susanne Tegler
Country Coordinator: Suheyla Demir
Observer: Jonas Forshamn

UKRAINE

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Team: Oles Fedirko, Nadiia Krupnikova, Anna Dmytruk
Mentor Biology: Zhanna Bilyk
Mentor Chemistry: Iryna Bei
Mentor Physics: Maksym Pashko
Country Coordinator: Yana Cheishvili
TASKS 
Here you can preview and download both tasks of the contest, the answer sheets and marking schemes (with filled in answer sheets + solutions).

TASK 1
Task / Answer sheet / Marking scheme

TASK 2
Task / Answer sheet / Marking scheme
PROGRAM 
Saturday 26//04/2025

Students and mentors

Whole day: Arrivals
19:00: Welcome dinner - National University Library
20:30: Opening Ceremony - National University Library

Sunday 27/04/2025

Students

07:30 Breakfast
09:00 Excursion - Krapina Neanderthal Museum
13:00 Lunch - Hotel Trakoscan
14:00 Excursion - Trakoscan Castle, mediaval games
19:00 Dinner - Student's Dormitory Stjepan Radic

Mentors

07:30 Breakfast
09:00 Discussion and translation T1
13:00 Lunch
14:30 Discussion & translation T1
19:00 Dinner
20:00 Discussion and translation T1

Monday 28/04/2025

Students

06:30 Breakfast
08:00 Task 1 (Team A) - Faculty of Science
09:00 Museum of Illusions: Team B
12:15 Lunch Team A - Students restaurant
12:30 Lunch Team B - Department of Physics
14:00 Task 1 (Team B) - Faculty of Science
14:00 Museum of Illusions: Team A
20:00 Dinner with mentors at Medvedgrad Beer Hall

Mentors

07:30 Breakfast
09:00 Excursion Plitvice Lakes National Park with walking lunch
20:00 Dinner with students at Medvedgrad Beer Hall

Tuesday 29/04/2024

Students

08:00 Breakfast
10:00 Excursion to Medvenica Nature Park
10:45 Hiking downhill to Mountain Hut Graficar
12:00 Lunch in Mountain Hut Graficar
13:00 Hiking downhill to Medvedgrad Castle and guided tour
19:00 Dinner at Student's Dormitory Stepnan Radic

Mentors

07:30 Breakfast
09:00 Discussion and translation T2
13:00 Lunch
14:30 Discussion & translation T2
19:00 Dinner
20:00 Discussion and translation T2

Wednesday 30/04/2025

Students

06:30 Breakfast
08:00 Task 2 (Team B) - Faculty of Science
09:00 Zagreb ZOO - Team A
12:15 Lunch Team B - Students restaurant
12:30 Lunch Team A - Department of Physics
14:00 Task 2 (Team A - Faculty of Science
14:00 Zagreb ZOO - Team B
20:00 Dinner with mentors at XVth Gymnaseum, European evening + quiz

Mentors

07:00 Breakfast
09:00 GB meeting - Faculty of Science
10:30 Excursion to Medvenica Nature Park
10:45 Hiking downhill to Mountain Hut Graficar
12:00 Lunch in Mountain Hut Graficar
13:00 Hiking downhill to Medvedgrad Castle and guided tour
20:00 Dinner with students at XVth Gymnaseum, European evening + quiz

Thursday 01/05/2025

Students

07:30 Breakfast
09:00 Guided City tour
12:30 Lunch - Students Dormitory
14:00 Guided City tour
19:00 Dinner

Mentors

07:00 Breakfast
09:00 Preparation of moderation & moderation - Pavillion of Botanic Garden
12:00 Lunch - Pavillion of Botanic Garden
13:00 Moderation & Guided Tours of Botanic Garden and Zagreb
19:00 Dinner

Friday 02/05/2025

Students

08:00 Breakfast
10:00 Croatian Museum of Natural History
12:00 Lunch - Students Dormitory
13:30 Free time
17:00 Closing Ceremony - National University Library
20:00 Farewell Dinner and party

Mentors

07:30 Breakfast
10:00 GB Meeting - Botanical Garden
12:00 Lunch
13:30 Free time
17:00 Closing Ceremony - National University Library
20:00 Farewell Dinner and party

Saturday 03/05/2025

Students and mentors

07:00 Breakfast
Whole day: Departures

RESULTS 
GOLD MEDALS

Ranking

Country

Team

1ESTONIAB
2ESTONIAA
3GERMANYA
4GERMANYB
5SLOVENIAB
SILVER MEDALS

Ranking

Country

Team

6CZECH REPUBLICA
7HUNGARYB
8BULGARIAB
9HUNGARYA
10LUXEMBOURGA
11PORTUGALA
12CZECH REPUBLICB
13CROATIAB
14LITHUANIAA
15SLOVENIAA
16THE NETHERLANDSA
17LATVIAA
18AUSTRIAA
19GREECEB
20BULGARIAA
21FRANCEB
BRONZE MEDALS

IN ALFABETICAL ORDER

Country

Team A

Team B

AUSTRIA—█

BELGIUM

██
CROATIA█—
CYPRUS██
DENMARK██
FINLAND██
FRANCE█—
GREECE█—
IRELAND██
ITALY██
LATVIA—█
LITHUANIA—█
LUXEMBOURG—█
PORTUGAL—B
SPAIN██
SWEDEN██
THE NETHERLANDS—█
GUEST TEAMS

Two guest teams, outside the official ranking, were awarded as follow:

Country

Medal

Team

UKRAINEGoldA

CROATIA

BronzeC