A zipper fastens using…
Permanent glue
Magnetic liquid
Interlocking teeth
Knotted fibres only
Trivia for Kids 8–14 · Mixed
Inventions by Function
Ten fresh questions for ages 8–14 exploring inventions by function. Mixed difficulty with explanations and host verification notes in the import file.
Corrugated cardboard gains stiffness from its…
Thin coat of perfume
Printed colour alone
Fluted middle layer
Smooth outer label
A printing press improved book production chiefly by…
Removing the need for text
Making paper grow faster
Writing every copy by hand
Reusing arranged printing surfaces
True or false: An invention can combine existing ideas in a new arrangement.
True
False
A mechanical typewriter records a letter by striking…
A laser onto metal
A pencil through glass
A wet brush against cloth
An inked ribbon against paper
A safety bicycle's chain drive allowed…
Wheels without axles
Useful gearing with similar-sized wheels
Riding without balance
Stopping without friction
A can opener solves a design problem involving…
Cutting or separating a sealed lid
Creating a vacuum chamber
Making food colder
Measuring ingredients
Which connects a paperclip and a reusable fastener?
Joining without necessarily making holes
Both permanently glue paper
Both erase writing
Both require electricity
Why was the standard shipping container useful?
It removes ports
It eliminates all packing
It guarantees every cargo weighs the same
It transfers between transport modes efficiently
A ballpoint pen meters ink using…
A moving paper blade
A tiny rolling ball
A burning wick
An exposed quill tip