tmy answer to the cat ? i should have said the cat question for that book instead. your cat has a flap in its ear. if air flows into it the wrong way the cat swings its front legs downward then the back legs follow. then the air flows in the right way.
every kernel of corn has a tiny droplet of water in it. heat the kernel, the water turns into steam, steam takes up more space than water, so it presses against the walls of the kernel. the corn expands and expands and pop! from the big book of questions and answers.