OS
OpenStem
@openstem · Joined Jul 2026
7420 public items8 groups
Quiz4 questions
Why does a metal spoon left in hot soup get hot to touch?
AMetal is a good heat conductor, so heat moves through it fastBMetal makes its own heatCThe soup only heats metal, not other materialsDMetal spoons are always warm
Engineering · L1 · Materials That Change With Heat Quiz
@openstem
Engineering · L1 · Materials That Change With Heat QuizQuiz4 questions
What does the saying "measure twice, cut once" mean?
AAlways cut things in halfBCheck your measurement again before cutting, so you don't make a mistakeCYou should never cut anythingDCutting is more important than measuring
Engineering · L1 · Measuring & Units Quiz
@openstem
Engineering · L1 · Measuring & Units QuizQuiz4 questions
What problem does an umbrella solve?
ACarrying heavy thingsBGetting wet in the rainCClosing clothes quicklyDSharpening pencils
Engineering · L1 · Everyday Inventions Quiz
@openstem
Engineering · L1 · Everyday Inventions QuizQuiz4 questions
Which bridge type is just a flat plank across a gap?
ABeam bridgeBArch bridgeCSuspension bridgeDNone of these
Engineering · L1 · Bridges for Kids Quiz
@openstem
Engineering · L1 · Bridges for Kids QuizQuiz4 questions
Why is a tower with a wide base more stable than one with a narrow base?
AA wide base is always heavierBA wide base spreads the weight out, giving more room to lean before it tipsCA wide base uses fewer blocksDWide bases are painted a different color
Engineering · L1 · Towers & Stacking Quiz
@openstem
Engineering · L1 · Towers & Stacking QuizQuiz4 questions
How does a remote control talk to a TV?
AThrough a hidden wireBBy sending an invisible signal through the airCBy shouting a commandDIt doesn't — the TV guesses
Engineering · L1 · Remote Controls & Signals Quiz
@openstem
Engineering · L1 · Remote Controls & Signals QuizQuiz4 questions
What does a motor do?
ATurns electricity into spinning motionBTurns spinning motion into electricityCMakes a room colderDStores electricity for later
Engineering · L1 · Fans & Motors Quiz
@openstem
Engineering · L1 · Fans & Motors QuizQuiz4 questions
Why can a metal boat float, even though a solid lump of the same metal would sink?
AThe boat is painted a special colorBThe boat's wide shape pushes a lot of water out of the wayCMetal boats are never heavyDThe water is always shallow near boats
Engineering · L1 · Boats & Floating Cargo Quiz
@openstem
Engineering · L1 · Boats & Floating Cargo QuizQuiz4 questions
Why does a raincoat keep rain from soaking through?
AIt is made from a waterproof material that water cannot pass throughBIt is very thickCIt is a bright colorDIt has pockets
Engineering · L1 · Dressing for Weather Quiz
@openstem
Engineering · L1 · Dressing for Weather QuizQuiz4 questions
Why do big projects like a bridge need a team of engineers?
ABecause one engineer is not allowed to work aloneBBecause there are many different parts to figure out at onceCBecause teams are always faster than machinesDBecause bridges are the only thing engineers build
Engineering · L1 · Teamwork in Engineering Quiz
@openstem
Engineering · L1 · Teamwork in Engineering QuizQuiz4 questions
What is a prototype?
AA first, small, cheap try used to test an ideaBThe final, expensive productCA tool used to measure thingsDA type of simple machine
Engineering · L1 · Prototypes & Model Building Quiz
@openstem
Engineering · L1 · Prototypes & Model Building QuizQuiz5 questions
Why is it much easier to push a loaded wagon on wheels than to drag the same load on the ground?
AWheels roll, which has far less friction than dragging and scrapingBWheels make the load lighterCWheels are always made of metalDDragging uses no friction at all
Engineering · L1 · Wheels & Axles Quiz
@openstem
Engineering · L1 · Wheels & Axles QuizQuiz6 questions
What is a ramp (inclined plane) used for?
ATurning a straight-up lift into a push up a slopeBMaking objects heavierCCutting things in halfDMeasuring distance
Engineering · L1 · Ramps & Wedges Quiz
@openstem
Engineering · L1 · Ramps & Wedges QuizQuiz6 questions
What is an electrical conductor?
AA material that lets electricity flow through it easilyBA material that blocks electricity completelyCA tool used to measure electricityDA type of battery
Engineering · L1 · Conductors & Insulators Quiz
@openstem
Engineering · L1 · Conductors & Insulators QuizQuiz6 questions
What happens when a magnet is brought near a steel paperclip?
AThe magnet attracts (pulls) the paperclip toward itBThe magnet pushes the paperclip awayCNothing happens at allDThe paperclip melts
Engineering · L1 · Magnets Quiz
@openstem
Engineering · L1 · Magnets QuizQuiz6 questions
Does air take up space?
AYes — it is real stuff made of tiny gas particlesBNo — air is nothing at allCOnly when it is very coldDOnly inside balloons
Engineering · L1 · Air Takes Up Space Quiz
@openstem
Engineering · L1 · Air Takes Up Space QuizQuiz5 questions
What is wind?
AAir that is movingBWater that is fallingCA kind of lightDSound bouncing around
Engineering · L1 · Wind & Sails Quiz
@openstem
Engineering · L1 · Wind & Sails QuizQuiz6 questions
Glue costs $1 and tape costs $2. What is the total cost of both?
A$2B$3C$4D$1
Engineering · L1 · Counting the Cost Quiz
@openstem
Engineering · L1 · Counting the Cost QuizQuiz6 questions
What is a design notebook used for?
AWriting down and sketching ideas, what you tried, and what happened, so you don't forgetBStoring your lunch moneyCDrawing only finished, perfect inventionsDMeasuring how long something is
Engineering · L1 · Keeping a Design Notebook Quiz
@openstem
Engineering · L1 · Keeping a Design Notebook QuizQuiz6 questions
What is the fulcrum of a lever?
AThe fixed point the lever pivots, or tips, aroundBThe heaviest part of the leverCThe part of the lever farthest from where you pushDA wheel attached to the lever
Engineering · L1 · Levers & Seesaws Quiz
@openstem
Engineering · L1 · Levers & Seesaws QuizQuiz6 questions
What makes a gear different from a plain, smooth wheel?
AA gear has teeth around its edge that grip another gearBA gear is always made of woodCA gear never spinsDA gear is always bigger than a wheel
Engineering · L1 · How Gears Turn Each Other Quiz
@openstem
Engineering · L1 · How Gears Turn Each Other QuizQuiz6 questions
What is a light bulb's job?
ATo turn electricity into lightBTo turn light into electricityCTo store electricity for laterDTo cool down a room
Engineering · L1 · Light Bulbs Quiz
@openstem
Engineering · L1 · Light Bulbs QuizQuiz6 questions
What does a buzzer do with electricity?
ATurns it into sound by making something vibrateBTurns it into lightCStores it for laterDTurns sound into electricity
Engineering · L1 · Sound Makers Quiz
@openstem
Engineering · L1 · Sound Makers QuizQuiz6 questions
Why does the air inside a hot air balloon make it rise?
AThe burner pushes the balloon up like a fanBHeated air becomes lighter than the cooler air around it and floats upCThe balloon is filled with heliumDThe basket gets lighter as people climb in
Engineering · L1 · Hot Air Rises Quiz
@openstem
Engineering · L1 · Hot Air Rises QuizQuiz6 questions
What is steam?
AWater as a gas, made by boilingBFrozen waterCA type of metalDWater mixed with air only, no heat involved
Engineering · L1 · Water Turning to Steam Quiz
@openstem
Engineering · L1 · Water Turning to Steam QuizQuiz6 questions
What is a trade-off?
AWhen getting more of one good thing means getting less of anotherBA tool used to measure weightCA machine that trades toysDA perfect design with no downsides
Engineering · L1 · Trade-Offs Quiz
@openstem
Engineering · L1 · Trade-Offs QuizQuiz2 questions
A cable being pulled tight from both ends is under which type of force?
ACompressionBTensionCGravity onlyDFriction
Engineering · L2 · Bridges and Forces Quiz
@openstem
Engineering · L2 · Bridges and Forces QuizQuiz2 questions
What must a circuit be for electricity to flow?
AOpen at one endBA complete closed loopCMade of plasticDVery long
Engineering · L2 · Circuits and Gears Quiz
@openstem
Engineering · L2 · Circuits and Gears QuizQuiz5 questions
What does it mean for a material to be 'strong'?
AIt resists being scratchedBIt can carry a heavy load or pull without breakingCIt always bends easilyDIt is always heavy
Engineering · L2 · Material Properties Quiz
@openstem
Engineering · L2 · Material Properties QuizQuiz6 questions
A truss is a framework built almost entirely out of which shape?
ASquaresBCirclesCTrianglesDPentagons
Engineering · L2 · Trusses & Triangulation Quiz
@openstem
Engineering · L2 · Trusses & Triangulation Quiz