1. What are the properties of poppy petals?

A) Antioxidants and mucilage for foam formation

B) Vitamins A and C

C) Iron - these petals are tough!

2. Assuming the earth warms up by 3 degrees by the year 2100, what percentage of today's glaciers in the Alps will still exist?

80 %, phew, there will still be enough for skiing!

50 %, there will still be at least a few water reserves

C) 20 to 30 %, most glaciers will only be a memory

3. Where are the most parrots?

A) In the northern hemisphere, to the delight of our ears

B) In the southern hemisphere, like on postcards

C) At the poles, where you can't hear them chattering

D) At the equator, exactly on the line

4. The black-headed gull is loud and its hoarse calls sound like a cackle. What surprising behaviour does it display during the breeding season when it is disturbed?

A) Firstly, it emits an alarm call that causes several birds to flee. Together they pounce on the intruder and spray it with faeces. They do this until the intruder flees. This harassing behaviour is known as ‘nagging’ or ‘bullying’.

B) It uses an undulating flight as a territorial warning signal, moving towards the nest with large movements.

C) It swings its head by rapidly extending and retracting its neck.

D) It only calls to draw the predator's attention away from the nest or the chicks.

5. Which term describes the phenomenon that plants react to distress signals from their conspecifics?

A) Photosynthesis

B) Phytocommunication

C) Mycorrhiza

D) Pollination

6. What is the difference between a duck and a simple bird?

A) Ducks have webbed feet to swim efficiently.

B) Ducks prefer salt water.

C) Ducks have a larger beak than other waterfowl, hence their nasal voice.

8. What is the difference between an aquatic plant and an algae?

A) The colour of the flowers

B) The number of leaves

C) Algae only live in seawater

D) Aquatic plants have a stem, leaves, fruits and roots

9. What proportion of atmospheric oxygen comes from plant plankton?

A) None, it remains in the water

B) 25 %, it is so small

C) 50 %

D) 66 %, almost as much as the Earth's water surface

10. What is the maximum length that bamboo rhizomes can reach under natural conditions?

A) 5 metres

B) 30 metres

C) 90 m, longer than three blue whales!

D) 350 metres

11. Which of these plants does not have a colour in common with its name?

A) Peach, like the skin tone

B) Purple

C) Persimmon, the military's favourite plant

D) Daisy

12. How can you protect yourself from the sulphur compounds produced when cutting an onion?

A) by holding your breath

B) by putting a spoon in your mouth

C) by using a butter knife

D) by placing a damp cloth next to the onion

13. What is the main component of the air we breathe?

A) Oxygen, which does not need to be introduced

B) Carbon dioxide, the famous greenhouse gas

C) Nitrogen, which is very important for diving

D) Helium, which gives us a high-pitched voice

14. What important role do insects play in ecosystems and why would their disappearance be particularly worrying for global food production?

A) They are natural predators of large mammals.

B) They recycle nutrients by breaking down organic material.

C) They pollinate many flowering plants that are important for food production.

D) They are mainly responsible for creating new natural habitats.

15. Velcro was developed from the seeds of which plant?

A) Burdock hook

B) bedstraw

C) Torilis

16. How long does it take for your piece of paper to decompose?

A) A few minutes, just enough time to wash your hands

B) A few days, the decomposers work weekly

C) A few weeks, the decomposers still need a bit of time

D) A few years, enough time to forget several times where it was buried

17. If all the ice in the poles and glaciers around the world melted, how many metres would sea level rise?

A) 4 metres, which is the depth of an Olympic swimming pool

B) 20 metres, about the height of an old building in Berlin.

C) 60 metres, almost the height of the Wohlersberg in Kiel

D) 200 m, you can't see much!

18. If you need the power of an Olympic cyclist to run a toaster, how much do you need to run a vending machine?

A) one cyclist

B) five cyclists

C) ten cyclists, we have to share this protein bar

D) 25 cyclists, one seventh of the Tour de France

19. What percentage of textiles are recycled in Europe?

A) 90% (the same as aluminium)

B) 75 % (like glass)

C) 32.5 % (like plastic)

D) 1 % (even less than complex plastics)

20. What percentage of the world's plastic ends up in the oceans every year?

A) 5 %

B) 7 %

C) 10 %

D) 15 %

21. What percentage of drinking water supply and wastewater disposal in Chile is carried out by private companies?

A) 2 %, controlled by the state

B) 20 %, the same percentage as the world average

C) 50 %, some small lakes are privately owned - after all, who wouldn't want their own lake?

D) 90 % We can only hope that they don't raise the price of water too much so that we still have something to drink in the future.

22. Which aquatic animal is also an artist and can draw underwater?

A) the eel, using its tail as a paintbrush

B) the octopus, thanks to its ink jets

C) balloon fish, to attract females

D) the shrimp, very precise thanks to its small legs