The cards Question As a water wave moves forward, how does each bit of water move? Tap to flip Answer Up and down (it oscillates); it does not move forward. Question What is an oscillation? Tap to flip Answer A back-and-forth movement. Question What is a transverse wave? Tap to flip Answer A wave in which the direction of oscillation is at 90° to the direction of energy transfer. Question Are water waves transverse or longitudinal? Tap to flip Answer Transverse. Question What is the amplitude of a water wave? Tap to flip Answer The greatest distance the water moves above and below its rest position. Question What is wave superposition? Tap to flip Answer Waves 'adding up' or 'cancelling out' as they pass through each other. Question What do wavefronts represent? Tap to flip Answer The positions of the peaks of a wave. Question What happens when water waves meet a hard barrier? Tap to flip Answer They reflect, obeying the laws of reflection. Question How are sound waves caused? Tap to flip Answer By objects vibrating, which makes nearby air particles vibrate too. Question What is a longitudinal wave? Tap to flip Answer A wave in which the vibrations are parallel to the direction of energy transfer. Question Is sound a transverse or a longitudinal wave? Tap to flip Answer Longitudinal. Question What is the medium of a wave? Tap to flip Answer The material through which the wave travels. Question As a sound wave travels through air, does the air move forward with it? Tap to flip Answer No. Each bit of air vibrates parallel to the direction the wave travels, without travelling forwards. Question Why do sound waves travel faster in solids and liquids than in gases? Tap to flip Answer Their particles are very close together, so vibrations are easily passed on. Question Why do sound waves travel faster in solids than in liquids? Tap to flip Answer The strong forces between the particles make the vibrations travel even faster. Question What is the speed of sound? Tap to flip Answer The distance a sound wave pulse travels every second, measured in m/s. Question What is the approximate speed of sound in air? Tap to flip Answer About 340 m/s. Question What is an echo? Tap to flip Answer A sound wave that reflects from a hard surface, travels back and is heard again. Question What equation links speed, distance and time? Tap to flip Answer Speed = distance ÷ time Question Do high-pitched sounds travel faster through air than low-pitched sounds? Tap to flip Answer No. They travel at the same speed (within measurement error). Question What is echolocation? Tap to flip Answer Detecting the distance to objects by making a sound and waiting for its echo to return. Question What is frequency? Tap to flip Answer The number of vibrations each second. Question What is the eardrum? Tap to flip Answer A membrane in the ear that incoming sound waves make vibrate. Question Which part of the ear contains specialised cells that sense vibrations and send electrical signals to the brain? Tap to flip Answer The cochlea. Question What creates the sensation of hearing a sound? Tap to flip Answer The brain, when it receives signals from the ear through a nerve. Question Do sound waves themselves have sound? Tap to flip Answer No. The sound heard does not exist until the brain creates it from nerve signals. Question What frequencies of sound waves can human ears detect? Tap to flip Answer Between 20 Hz and 20 kHz. Question Which frequencies are human ears most sensitive to? Tap to flip Answer 2–5 kHz. Question What does the amplitude of a sound wave measure? Tap to flip Answer How far the particles vibrate. Question What are sound waves with a frequency below 20 Hz called? Tap to flip Answer Infrasound. Question What is ultrasound? Tap to flip Answer Sound waves with a frequency above 20 000 Hz, which human ears cannot detect. Question How do ultrasound waves show that they transfer energy? Tap to flip Answer They can cause objects to vibrate. Question Why can ultrasound be used to image structures inside the body? Tap to flip Answer It reflects from the boundaries between tissues. Question Which kind of objects can ultrasound vibrations be used to clean? Tap to flip Answer Delicate objects. Question Is ultrasound a different kind of wave from sound? Tap to flip Answer No. It is essentially the same as sound: longitudinal waves made of vibrations of matter. Question What is a tissue? Tap to flip Answer A group of similar living cells that perform a specific function. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage Key stage 3 (Years 7–9) Course KS3 Science Unit Waves England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Science lesson by Oak National Academy licensed under Open Government Licence (OGL)
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