Water & Hydrogen treasure hunt
Water and hydrogen are the building blocks of our lives and the key to a sustainable future. With our interactive GPS scavenger hunt, you will discover the hidden world of molecules, chemical reactions and green energy technology. Playfully learn about the most common element in the universe!
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Made 2 days ago: Enkhuizen city walk in Enkhuizen
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Be the first to create a chemistry treasure huntFeatured this week: example questions for Water & Hydrogen
New example questions from the library every Monday. Updated on 12 October 2026.
Which animal likes to swim in water?
A duck
A cat
A bird
A mouse
Where does water go when it goes down the drain?
Down
To the sky
To the moon
To the sun
What happens to water in winter?
It can freeze
Turning red
It is going to sing
It will be big
What colour is ice cream?
White or transparent
Red
Yellow
Purple
Which toys like water?
A rubber duck
A book
A puzzle
A hug
What colour is hydrogen gas?
No colour
Red
Green
Purple
What can you do in a swimming pool?
Swimming
Flies
Climbing
Graves
What happens when water gets very cold?
It will be ice cream
Turning red
It will be sand
It will be grass
Which balloons rise because they are filled with a light gas?
Helium or hydrogen balloons
Hot-air balloons
Water balloons
Oxygen balloons
What is the function of water in washing?
It dissolves dirt
It makes everything hard
It gives off a scent
It changes the colour
Why does ice float on water?
Because ice is lighter than water
Because ice is colder
Because ice is translucent
Because ice is hard
What happens when hydrogen gas and oxygen come together and ignite?
Water is created
Ice forms
Salt is created
Oil is produced
How many hydrogen atoms are in one water molecule?
2
1
3
4
What happens to ice when it gets warmer?
It melts and becomes water
It gets tougher
It changes colour
It's going to float
What makes water so special for life?
It can dissolve and transport substances
It is always the same temperature
It has a strong smell
It is very heavy
What do you call the process by which water vapour becomes water again?
Condensation
Evaporation
Freezing
Melt
How much energy is needed to convert 1 gram of 0°C ice into 0°C water?
334 Joule
100 Joule
500 Joule
250 Joule
Which property of water causes the high surface tension?
Hydrogen bonds between molecules
High density
Ionic interactions
Low molecular mass
What is the refractive index of water for visible light?
About 1.33
Exactly 1.00
About 1.50
About 2.00
How many hydrogen atoms does a molecule of deuterium oxide (heavy water) contain?
2
1
3
4
What hybridisation does oxygen have in water?
sp³
sp²
sp
No hybridisation
Which property of water causes capillary action?
Adhesion and cohesion
Only cohesion
Only adhesion
Density
Which property of water makes ice float?
Water expands on freezing
Ice is warmer than water
Ice contains more oxygen
Ice has a different chemical formula
Which form of water conducts electricity best?
Seawater
Distilled water
Ice
Water vapour
Which technique is often used to produce very pure water?
Reverse osmosis
Simple filtration
Sedimentation
Chlorination
What substance is produced when hydrogen peroxide (H₂O₂) decomposes?
Water and oxygen
Water and hydrogen
Water only
Hydrogen and oxygen
What is the oxidation state of hydrogen in water (H₂O)?
+1
-1
+2
What method is used to industrially produce hydrogen from natural gas?
Steam Reformation
Electrolysis
Pyrolysis
Catalytic oxidation
What phase transition occurs during sublimation of ice?
Directly from fixed to gas
From solid to liquid
From liquid to gas
From gas to solid
What is the specific heat of water?
4.18 J/g-K
2.09 J/g-K
1.00 J/g-K
8.36 J/g-K
What technique is used to purify water by ultraviolet light?
UV disinfection
UV osmosis
UV filtration
UV distillation
What is the surface tension of water at 20°C?
72.8 mN/m
50.0 mN/m
100.0 mN/m
25.0 mN/m
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Frequently asked questions
A Water & Hydrogen scavenger hunt is a GPS-guided outdoor activity with quiz questions about Water & Hydrogen, part of the theme Chemistry. You walk a route past various locations and answer fun questions along the way.
There are 1679 questions available about Water & Hydrogen: 1679 multiple choice questions, 0 open questions and 0 assignments. The category Chemistry has more than 43772 questions in total.
There are Water & Hydrogen questions for all ages: from 3-5 years (toddlers) to 20+ (adults). The questions are automatically adapted to the chosen level.
Go to oppatt.io, create a free account, choose the theme Chemistry and select Water & Hydrogen as the topic. Choose an age category and location, and you'll have a complete scavenger hunt within a minute.