Everyday Objects: Why? Quiz – Printable Version
20 multiple-choice questions with an explained answer key, ready to print.
Print the sheet (or save it as a PDF from the print window), hand it out, then mark it together using the answer page: every answer is explained. Perfect for a party, a birthday, a classroom, a care home or a team activity.
Name: ………………………………Score: ……… / 20
- Why are airliner windows rounded rather than square?
- A. To distribute pressurisation stresses more evenly
- B. To improve the outside view
- C. To reduce aircraft weight
- D. To make cleaning easier
- Why do modern electrical outlets include an earth/ground connection?
- A. To carry fault current safely to earth/ground
- B. To increase voltage
- C. To reduce electricity consumption
- D. To improve Wi-Fi reception
- Why can a bathroom mirror fog up after a shower?
- A. Water vapour condenses on a colder surface
- B. The glass releases moisture
- C. Soap evaporates onto the mirror
- D. The mirror becomes electrically charged
- Why does a metal spoon left in a hot drink become hot?
- A. Heat travels through the metal by conduction
- B. The spoon creates heat chemically
- C. Hot water becomes magnetic
- D. The handle stores microwave energy
- Why does the turntable rotate in many microwave ovens?
- A. To distribute microwave exposure more evenly
- B. To cool the food
- C. To weigh the dish
- D. To stop the magnetron
- Why is toilet paper usually perforated into sheets?
- A. To make it easy to tear off a controlled length
- B. To sterilise each sheet
- C. To make the roll waterproof
- D. To increase paper strength
- Why is the bottom of a drinks can usually concave?
- A. To better withstand internal pressure
- B. To collect sugar
- C. To improve radio reception
- D. To make the can roll faster
- Why does a vacuum flask have two walls separated by a highly insulating space?
- A. To reduce heat transfer
- B. To increase internal pressure
- C. To mix the drink
- D. To sterilise the liquid
- Why can a classic paper clip hold several sheets without glue?
- A. Its springy wire exerts pressure when deformed
- B. Static electricity bonds the sheets
- C. The metal melts into the paper
- D. A hidden adhesive is activated
- Why is a hammer handle much longer than the thickness of its head?
- A. To increase the head's speed and energy during the swing
- B. To reduce gravity
- C. To cool the hammer head
- D. To make the hammer magnetic
- Why does the thread of a screw help it hold in a material?
- A. It converts rotation into forward motion and creates mechanical engagement
- B. It melts into the material
- C. It creates suction
- D. It neutralises friction completely
- Why do shoelaces pass through several eyelets rather than one tightening point?
- A. To distribute tightening along the foot
- B. To waterproof the shoe completely
- C. To make the sole harder
- D. To stop the foot growing
- Why do many cable-driven lifts/elevators have a counterweight?
- A. To balance part of the mass and reduce the energy required
- B. To make the cabin heavier
- C. To stop all cable wear
- D. To replace the brakes
- Why does a suction cup stick to a smooth surface after some air is pushed out from underneath?
- A. Outside pressure becomes greater than the pressure beneath the cup
- B. The rubber becomes magnetic
- C. Glue is released from the cup
- D. The surface melts slightly
- Why must battery polarity be respected in many devices?
- A. The circuit is designed to receive voltage with a specific polarity
- B. Batteries work only when facing north
- C. Reversing them doubles voltage
- D. Polarity only changes battery colour
- How can a smartphone screen detect a finger without a mechanical button being pressed?
- A. A capacitive screen detects a change in the electric field
- B. The screen measures finger weight
- C. A camera recognises every touch
- D. The glass bends mechanically
- Why can a faucet aerator make the stream look full while reducing water flow?
- A. It mixes air into the stream and shapes the flow
- B. It heats the water
- C. It removes all minerals
- D. It increases mains pressure
- Why does a toothbrush have many small tufts rather than one large compact brush?
- A. To follow surfaces and reach more areas around the teeth
- B. To make toothpaste foam
- C. To sharpen the teeth
- D. To measure bite force
- Why is a kitchen-knife handle usually thicker than its blade?
- A. To provide a secure grip and transmit force with control
- B. To make the blade heavier
- C. To store sharpening oil
- D. To prevent all heat transfer
- Why does a plate often have a slightly raised rim?
- A. To better contain food, sauces and liquids
- B. To sharpen cutlery
- C. To make the plate spin
- D. To reduce food temperature
Answer key — Everyday Objects: Why? Quiz
- A. To distribute pressurisation stresses more evenlyThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To carry fault current safely to earth/groundThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. Water vapour condenses on a colder surfaceThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. Heat travels through the metal by conductionThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To distribute microwave exposure more evenlyThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To make it easy to tear off a controlled lengthThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To better withstand internal pressureThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To reduce heat transferThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. Its springy wire exerts pressure when deformedThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To increase the head's speed and energy during the swingThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. It converts rotation into forward motion and creates mechanical engagementThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To distribute tightening along the footThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To balance part of the mass and reduce the energy requiredThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. Outside pressure becomes greater than the pressure beneath the cupThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. The circuit is designed to receive voltage with a specific polarityThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. A capacitive screen detects a change in the electric fieldThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. It mixes air into the stream and shapes the flowThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To follow surfaces and reach more areas around the teethThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To provide a secure grip and transmit force with controlThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.
- A. To better contain food, sauces and liquidsThe design has a practical purpose linked to safety, physics, ergonomics or manufacturing.