Output Contrast ratio Input Background Contrast ratio helps predict text readability DemonstratesLearning
Output Shared surround Input Light surround Surrounding colour changes perceived colour RevealsLearning
Output A higher pressure reading in the warm tyre Input A sealed tyre warmed while its volume changes little Warmer air raises tyre pressure CausesLearning
Output Warmer food, often heating unevenly from its composition and shape Input Water-rich food placed in a microwave oven Microwaves heat water-rich food CausesLearning
Output The warm parcel moves upward and convection begins Input A parcel of air warmed while nearby air stays cooler Warm air rises through cooler air CausesLearning
Output Hair strands lift toward the balloon Input A rubber balloon rubbed against dry hair A rubbed balloon attracts hair CausesLearning
Output The paper clip moves toward the magnet Input A permanent magnet brought near an iron paper clip A magnet attracts iron CausesLearning
Output A long morning shadow, short midday shadow and long evening shadow Input The same upright object observed through the day Sun angle changes the length of a shadow CausesLearning
Output An audible tone reaching a listener Input A tuning fork struck and allowed to vibrate A vibrating object produces sound ProducesLearning
Output A slightly larger metal object Input A metal object warmed above its starting temperature Most metal expands when heated CausesLearning
Output Drier skin at a lower surface temperature Input Water on warm skin exposed to moving air Evaporation cools wet skin CausesLearning
