Why does a ramp make moving a load upward easier?
A) Warm air expands and becomes less dense than cooler air B) It spreads the required work over a longer […]
Every Day Science, Scientific Reasons
Scientific Reasons
Every Day Science, Scientific Reasons
Why does a red object look dark under only blue light?
A) It reflects little of the blue illumination B) Different wavelengths refract by different amounts C) Air scatters shorter visible […]
Every Day Science, Scientific Reasons
Why does a refrigerator require electrical energy to cool its inside?
A) A compressor moves heat from colder space to warmer surroundings B) It absorbs much incoming solar radiation C) Higher […]
Every Day Science, Scientific Reasons
Why does a shadow become sharper with a small distant light source?
A) Fewer light rays reach the edge from different directions B) Retroreflection sends much light back toward the source C) […]
Every Day Science, Scientific Reasons
Why does a river deposit sediment near its mouth?
A) Rising air cools and vapor condenses on tiny particles B) The Moon rotates once in roughly one orbit around […]
Every Day Science, Scientific Reasons
Why does a ship of steel float while a small steel nail sinks?
A) Sand grains are too large to pass through the pores B) The ship displaces enough water with its hollow […]
Every Day Science, Scientific Reasons
Why does a smooth mirror show a clear image while rough paper does not?
A) Raindrops refract and reflect sunlight by color B) A long atmospheric path scatters away much short-wavelength light C) Earth's […]
Every Day Science, Scientific Reasons
Why does a straight straw look bent where it enters a glass of water?
A) Refraction makes underwater light rays change direction B) Tiny droplets scatter light back toward the observer C) Refraction changes […]
Every Day Science, Scientific Reasons
Why does a towel dry faster when spread out on a clothesline?
A) Its mass increases B) Air ceases moving C) Water becomes a solid D) More surface area is exposed to […]
Every Day Science, Scientific Reasons
Why does a volcano often appear near a subduction zone?
A) Descending rock can contribute to melting above the plate B) Water changes temperature more slowly than land C) Its […]