A screw's spiral thread turns rotation into…
Sound storage
Linear movement
Light pulses
Chemical energy
Trivia for Kids 8–14 · Mixed
Wheels, Gears and Handy Tools
Ten fresh questions for ages 8–14 exploring wheels, gears and handy tools. Mixed difficulty with explanations and host verification notes in the import file.
A pulley fixed overhead chiefly changes a rope force's…
Direction
Mass
Material
Energy source
Why do scissors combine handles with sharp blades?
They remove friction entirely
Handles must be heavier than users
Leverage and concentrated pressure aid cutting
Sharpness creates extra matter
Two meshing external gears rotate in…
Random directions
Opposite directions
The same direction always
No direction
A small driving gear turns a larger gear. The larger gear rotates…
More quickly
More slowly
Only vertically
At identical speed always
True or false: A simple machine creates energy from nothing.
True
False
A wedge helps split wood by…
Producing electricity
Freezing the fibres
Redirecting force sideways
Removing wood's mass
A ramp makes lifting a load easier by trading lower force for…
Zero work
Less load mass
Less total height
Longer travel distance
Why does a ratchet wrench work well in a tight space?
It resets without turning the fastener backward
It melts the bolt
It removes all torque
It needs no contact
A differential helps a car turn because its driven wheels can…
Ignore road grip
Always stop together
Become different materials
Rotate at different speeds