Copper-bottomed cooking pot: a science project Why do pots have copper bottoms? Because heat and electricity are closely related, copper is also a good conductor of heat. This is why [...]
Swimming pool To find out what chlorine smells like, just go to the swimming pool. The funny smell of swimming pools is the smell of chlorine. (Actually, the chlorine doesn't [...]
Frozen carbon dioxide (dry ice) - for your carbon dioxide project How can you see carbon dioxide? Normally you can't see carbon dioxide because it is an invisible gas. But [...]
Central Asian science: A clay pot with a drawing of a wheeled cart from what is now Poland, about 3500 BC What was invented in Central Asia? Many of the [...]
History of coal: These are lumps of coal What is coal made of? Most of the coal on Earth formed during the Carboniferous Period about 350 million years ago, when [...]
After the collapse of the Mongol Empire in the end of the Middle Ages, scientists and doctors had to find homes in the courts of the smaller kingdoms that succeeded the Mongols. [...]
The virus that causes AIDS (greatly magnified) HIV image copyright Russell Knightley Nobody is quite sure whether viruses are living things or not. The first living things may have come [...]
Talk to your grandparents about vaccinations Until the 1950s, most people never got any vaccinations at all. To see how much kids' lives have changed because of vaccination, find somebody [...]
Veins in a leaf About 600 million years ago, the first plant cells evolved to be different from animal cells, and from earlier prokaryote cells, because they had a stiff [...]
Squirrel eats pine seeds from a cone Go take a walk outside in the fall and collect pine cones on the ground. How many different kinds of pine cones can [...]
