Output An earthy scent known as petrichor Input Rain beginning after a dry period on soil or rock Why can rain produce an earthy smell? AnswersGeneral
Output Eyes produce tears that dilute and wash away the irritant Input An onion cut open near unprotected eyes Why do cut onions make eyes water? AnswersGeneral
Output A brittle reddish-brown layer of rust on the iron Input Unprotected iron exposed to oxygen and moisture Iron rusts when water and oxygen are present ProducesLearning
Output A lower ultraviolet dose to covered skin Input Skin covered evenly with broad-spectrum sunscreen Sunscreen reduces ultraviolet exposure CausesLearning
Output Apple flesh that stays pale for longer Input Freshly cut apple coated with lemon juice Lemon juice slows apple browning CausesLearning
Output A rough layer of iron oxide corrosion Input Bare iron exposed to moist air Water and oxygen rust iron ProducesLearning
Output A separate oil layer on the surface Input Cooking oil poured into still water Oil floats on water ExplainsLearning
