Select a subject: Animals Astronomy Biology Botany Chemistry Earth Science General Science Insects Math Why are golf balls dimpled? Why does Rice Krispies cereal make so much noise when you pour milk on it? How do traffic lights know to change when cars pull up to them? How does hitting a magnet weaken its magnetic strength—or does it? Why does a glass full of cold pop “sweat”? What is modified corn starch? How do microwaves help in heating or drying? Is it possible to use it on a large scale apart from its drastic effects? At a construction site for a tall building you see them using a crane on top of a tall scaffolding. How do they build that scaffolding and get the crane up on top? How do binoculars work? I would like to know who invented the central air-conditioner used in households. Does modified corn starch contain yeast? Does the beginning temperature of water affect the time it takes to freeze? Can an opera singer really shatter a wineglass by voice alone? How does light move? If you plug wires into a potato, how does it make a clock run? Or anything else...how does it make electricity? What are fillings (for teeth) made of? Why is ice slippery? Why don't you fall out of a roller coaster car when it spins/turns upside-down? What is friction? Can the path of light be bent? What happens when you drop a penny into a salt and vinegar solution, and why? How does a speaker work? Why can it make any noise someone wants it to make? What is scotch tape made from, and how does it work? Why does water stay inside a bucket when you swing it in circles? How does a water tower work? Why do we give things scientific names? How deep can a submarine dive? Who invented the car? Why are the most popular pencils only No. 2? What is the longest word in English? Why can't the space shuttle fly in the rain? Can you really fry an egg on a sidewalk? Where does dust come from?
