Photosynthesis treasure hunt
Photosynthesis scavenger hunts introduce you to the fascinating world of plant life through interactive GPS routes. Discover how plants convert sunlight into food and produce oxygen while completing fun tasks. A perfect combination of nature, science and adventure!
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Available nature treasure hunts (5)
Natuur in de Stad
Groningen, Groningen, Netherlands
Fiets langs de mooiste groene plekken van Groningen. Ontdek parken, vijvers en stadsbossen waar je midden in de stad to…
Natuur
9-10 year
Strand en zee ontdekken
Den Haag, Zuid-Holland, Netherlands
Een leuke speurtocht langs het strand en de boulevard van Scheveningen. Leer alles over de zee, schelpen en zeedieren!
Natuur
9-10 year
Natuur en dieren bij Kijkduin
Den Haag, Zuid-Holland, Netherlands
Pak je fiets en ontdek de prachtige natuur rond Kijkduin. Van duinen tot bossen, van zeevogels tot konijnen - de natuur…
Natuur
9-10 year
Natuur in het Kralingse Bos
Rotterdam, Zuid-Holland, Netherlands
Een leuke speurtocht voor de allerkleinsten door het mooie Kralingse Bos! Kijk goed om je heen naar bomen, bloemen, een…
Natuur
5-6 year
Natuur ontdekken in het Vondelpark
Amsterdam, Noord-Holland, Netherlands
Een leuke speurtocht door het Vondelpark voor de allerkleinsten! Tel eendjes, zoek bloemen en ontdek de natuur om je he…
Natuur
3-4 year
Featured this week: example questions for Photosynthesis
New example questions from the library every Monday. Updated on 5 October 2026.
Why are forests good for us?
They make clean air
They make noise
They make dirt
They make dark skies
How does a leaf feel?
Soft
Very hard
As stone
As iron
Which animal helps plants by spreading seeds?
Birds
Cars
Computers
Chairs
How does water get to the leaves?
Through the stem
By air
With a bucket
It flies there
What is good for plants?
Watering
Making a lot of noise
Pulling the leaves
They hide
What do you see when a plant is just starting to grow?
Small green dots
Large flowers
Thick branches
Lots of fruit
Which colour have the most flowers?
All colours
Black only
Grey only
No colour
When do plants work hardest?
By day
In the night
In winter
When it rains
What happens if you don't water a plant?
He withers
He gets bigger
He turns blue
He will sing
What gives the plant energy to grow?
Sunlight
Music
Television
Noise
What happens when a leaf turns yellow?
It loses chlorophyll
It gets more chlorophyll
Getting sick
It gets stronger
How does the sun help plants?
By giving light energy
By keeping them warm
By watering
By making music
Which plant has no real leaves?
A cactus
A rose
A tulip
An oak tree
Why do some plants have large leaves?
To capture more light
To be more beautiful
To make music
To fly
What gas do humans exhale that plants can use?
Carbon dioxide
Oxygen
Water
Air
Why are forests important to us?
They make oxygen
They make cars
They make houses
They make computers
What happens to plants when there is no sunlight?
They cannot make food
They grow faster
They become blauer
They will sing
Which plant can you eat?
Save
Poisonous mushroom
Nettle
Cactus
When is the best time for plants to make their food?
By day
At night
In winter
Never
What do plants make for themselves as food?
Sugar
Bread
Meat
Cheese
What do we get from fruit trees?
Fruit and oxygen
Fruit only
Oxygen only
Nothing
Where does grass grow best?
In the sunlight
In the shade
Underwater
In a cupboard
What is the difference between animals and plants?
Plants make their own food
Animals are greener
Plants can walk
Animals do not grow
Which tree gives off oxygen?
All trees
Oak trees only
Pine trees only
No tree
Which plants can NOT do photosynthesis?
Mushrooms
Grass
Trees
Flowers
What scientific tool can we use to study photosynthesis?
A microscope
A thermometer
A compass
A scale
What role does the sun play in photosynthesis?
It provides the energy for the process
She warms up the plants
She gives the plants a nice colour
She makes plants grow
What do plants need from the air to photosynthesise?
Carbon dioxide
Nitrogen
Hydrogen
Helium
Can cacti also photosynthesise?
Yes, in their green stalks
No, they don't have leaves
Only at night
Alone in their thorns
Which form of energy does the plant convert into sugar?
Light energy from the sun
Heat from the ground
Noise from the environment
Electrical energy
Why do we see leaves as green?
Because green light is reflected back
Because they take green light
Because they make green light
Because they store green light
Why is photosynthesis important for animals?
Because plants make oxygen that animals need
Because plants make heat
Because plants make water
Because plants make noise
In which part of the plant does photosynthesis mainly take place?
In the leaves
In the roots
In the stem
In flowers
Which trees lose their leaves in autumn?
Deciduous trees such as oak and beech
Conifers such as pines and spruces
All trees
No tree
How can cacti photosynthesise in the desert?
They have chlorophyll in their thick stem
They do not photosynthesise
They use sand instead of water
They only use moonlight
What energy is converted during photosynthesis?
Light energy is converted into chemical energy
Chemical energy is converted into light energy
Heat is converted into light energy
Motion energy is converted into heat
What percentage of the oxygen in our atmosphere comes from photosynthesis?
About 70%
About 20%
About 50%
Around 90%
When do plants inhale oxygen and exhale carbon dioxide?
Day and night, but you see it better at night
Daytime only
Only at night
Plants do not breathe
Why is photosynthesis important for humans?
Plants make the oxygen we breathe
Plants make carbon dioxide for us
Plants make water for us
Plants make sunlight for us
What part of solar radiation do plants use for photosynthesis?
About 1-3% of all solar radiation
About 50% of all solar radiation
About 90% of all solar radiation
All solar radiation
What percentage of all oxygen on Earth is produced by plants on land?
30%
70%
90%
10%
Why do conifers have an advantage in winter?
They retain their needles and can photosynthesise in mild weather
They do not use water for photosynthesis
They produce antifreeze proteins
They switch to cellular respiration
What factor can inhibit photosynthesis at very high temperatures?
Enzyme denaturation
Too much light
Too much CO2
Too little chlorophyll
Which factor has the greatest influence on the rate of photosynthesis?
Light intensity
Wind power
Humidity
Soil type
What structures in chloroplasts contain chlorophyll?
Thylakoids
Stroma
Grana
Cristae
When do plants produce oxygen?
Daytime only
Only at night
24 hours a day
Only in winter
Which scientist discovered the process of photosynthesis?
Jan Ingenhousz
Charles Darwin
Gregor Mendel
Louis Pasteur
Which sugar is directly produced during photosynthesis?
Glucose
Fructose
Saccharose
Lactose
What type of plants use C4 photosynthesis?
Tropical grasses such as maize and sugarcane
Conifers in cold climates
Aquatic plants in lakes
Fungi and yeasts
What happens during the regeneration phase of the Calvin cycle?
RuBP is regenerated so the cycle can continue
Glucose is broken down
New chloroplasts are formed
Water is produced
What is photographic inspiration?
A process in which RuBisCO binds oxygen instead of CO2
Production of extra oxygen in bright sunshine
Breathing plants in the dark
The conversion of glucose to starch
What is the primary function of the reaction centre in a photosystem?
Electrons are excited and passed to electron acceptors
CO2 is fixed
Water is transported
Glucose is stored
What form of photosynthesis do succulents like cacti use?
CAM photosynthesis
C4 photosynthesis
C3 photosynthesis
Anoxygenic photosynthesis
What is the effect of too little magnesium on photosynthesis?
Chlorophyll production is disrupted because magnesium is central to chlorophyll
The plant produces too much oxygen
Stomata remain permanently open
Calvin cycle accelerates
What is the difference between cyclic and non-cyclic photophosphorylation?
Non-cyclic produces both ATP and NADPH, cyclic only ATP
Cyclic takes place only at night
Non-cyclical does not use light
Cyclic produces more oxygen
What evolutionary significance has photosynthesis had for life on Earth?
It produced oxygen and changed the atmosphere
It removed all CO2 from the atmosphere
It lowered the earth's temperature
It only affected plants
Which enzyme catalyses the first step of CO₂ fixation in C4 plants?
PEP carboxylase
RuBisCO
Pyruvate kinase
Malate dehydrogenase
What happens in photosystem II (PSII)?
Water is split and oxygen is released
NADP⁺ is reduced to NADPH
ATP is formed by photophosphorylation
CO₂ is fixed to RuBP
What is the primary product of the Calvin cycle?
Glyceraldehyde-3-phosphate (G3P)
Glucose
Sucrose
Starch
What is the first stable product of CO₂ fixation in C3 plants?
3-phosphoglycerate
Oxaloacetate
Malate
Pyruvate
Which compound accepts CO2 in the Calvin cycle?
Ribulose-1,5-bisphosphate (RuBP)
Phosphoenolpyruvate (PEP)
Oxaloacetate
3-phosphoglycerate
Which temperature inhibits photosynthesis the most by photorespiration?
High temperatures (above 30°C)
Low temperatures (below 10°C)
Average temperatures (20-25°C)
Temperature does not affect photorespiration
What is the effect of high O₂ concentrations on RuBisCO?
Increased photorespiration and reduced CO₂ fixation
Improved CO₂ fixation
No effect
Increased ATP production
What is the difference between grana and stromathylakoids?
Grana are stacked thylakoids, stroma thylakoids connect different stacks
Grana contain PSI, stroma thylakoids contain PSII
Grana are for light reactions, stroma thylakoids for Calvin cycle
Grana contain chlorophyll a, stroma thylakoids chlorophyll b
What is the primary cause of seasonal variation in photosynthesis?
Variation in light intensity and day length
CO2 concentration in the atmosphere
Variation in oxygen content
Change in leaf colour
What is the function of photoprotection in plants?
Protection against damage from excess light
Improving light absorption
Increasing CO2 fixation
Water saving ring
What is the theoretical maximum efficiency of photosynthesis?
About 4-6%
About 20-25%
About 50%
About 10-15%
Which ion is essential for the function of the oxygen-evolving complex in PSII?
Manganese (Mn4+)
Iron (Fe3+)
Magnesium (Mg2+)
Calcium (Ca2+)
How many protons are pumped per electron transported in the thylakoid?
About 1
About 3
About 2
About 4
What is the quantum efficiency of photosynthesis (maximum amount of CO2 fixed per photon absorbed)?
About 1/8 to 1/10
About 1/2
About 1/4
About 1
How many CO2 molecules must be fixed for one glucose molecule?
6
3
12
18
In which part of the chloroplast does the Calvin cycle take place?
Stroma
Thylakoid membrane
Intermembrane space
Grana
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A Photosynthesis scavenger hunt is a GPS-guided outdoor activity with quiz questions about Photosynthesis, part of the theme Nature. You walk a route past various locations and answer fun questions along the way.
There are 6313 questions available about Photosynthesis: 6313 multiple choice questions, 0 open questions and 0 assignments. The category Nature has more than 133631 questions in total.
There are Photosynthesis questions for all ages: from 3-5 years (toddlers) to 20+ (adults). The questions are automatically adapted to the chosen level.
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