検索キーワード： 物事の仕組み

Bridges are engineering marvels! It takes a civil engineer, chief engineer, structural engineer and environmental engineer to build a bridge. There are different kinds that each require a special construction process to build. Learn how different bridges such as beam, suspension and arch bridge types are designed and built, as well as the construction workers needed at specific stages.

Have you ever wondered how big cities are created? Learn how small towns start with just a few houses and farms, and then grow into large cities with many roads, buses, and skyscrapers! See how cities grow and change throughout history by the growing population of people living, working and shopping among each other.

Have you ever wondered how a penny or dime is made? Coins are made from metal in factories called mints. First, an artist draws a picture of the coin, next clay is used to make a mold made from plastic. Then a machine engraves and designs a piece of metal–these metal pieces will be used to make stamps called dies. In the United States, there are only four factories–can you guess where?

Popcorn is a yummy snack–how is popcorn cooked? From an un-popped kernel, heat boils the water that the kernel naturally has inside it. The water turns into steam after it builds up inside. Scientists used cameras to discover how corn popped! What’s inside the kernel to make an explosive change happen–turning a kernel of corn into a tasty buttery treat–popcorn?

Ada wants to win a prize one day for her inventions. She has many ideas. When it’s time to clean up her blocks, Ada has a great idea to make clean-up time easier. Ada thinks to use her father’s old socks to invent a way to stay on her two feet on an icy day! Ada’s ideas to recycle old things makes her a great inventor!

En la historia del cine abundan personas creativas, sueños, costumbres, formas de vida, avances tecnológicos... Desde la primera exhibición pública en Francia hasta la llegada de la TV a las casas, una buena parte del siglo XX contada a través del cine, sus personajes y sus hacedores...

What does a light bulb require to burn bright? What happens when a light bulb burns out? Discover how filament, made of one of the heaviest metals, a mixture of two gases, a 60-watt light bulb, and electric currents make this bright idea more than just a bright light! The amazing science behind the light bulb awaits you!

In medicine, machines can be used to take detailed pictures of bones and even to save people’s lives. Listen to learn about the marvelous machines of modern medicine, like the defibrillator, the x-ray machine, and more!

Auto racing is all about aerodynamics. Racecars use two different forces, lift and drag, to fly around the track. Find out how the cars use these forces, and then “fly” your own racecar with a fun experiment!

Have you ever wondered how tall and long bridges are built? Learn about three different bridges and try the activities to learn about how strong bridges, like the Golden Gate Bridge, are made.

If you’re looking for a great invention, look no further than your bathroom or kitchen! Did you know that the first flushing toilet was invented four thousand years ago? Or that a melted chocolate bar sparked the discovery of the microwave? Learn about these great inventions and more!

Gears are simple machines that can make up an even bigger machine, like a robot or a clock! Listen to learn about how gears make work easier.

¿Cómo funciona el airbag? ¿Por qué lloramos cuando cortamos cebollas? ¿Qué tienen de especial las telas deportivas? Acompaña a Silvana y Marina en su “día a pura química” y descubre esta disciplina apasionante. 'Destacado' por la Asociación de Literatura Infantil y Juvenil de la...

A bicycle is a fun and efficient way to get from one place to another. But have you ever wondered what parts make up a bike? Some bikes have hand lever brakes while others do not. Riders with more experience usually set their seats a bit higher than those with less experience.

Did you know hot air balloons were dreamed up by a French boy in the 1700s? Joseph Montgolfier devoted his life to experiments that he hoped would allow him to fly. With the help of his little brother, his invention allowed humans to fly for the first time in history!

Do your shoes fasten with Velcro straps? Have you ever wondered where this strange invention comes from? Sometimes nature provides excellent inspiration for new solutions! Plant burs stuck in his dog's fur gave Swiss engineer George de Mestral a good idea.

Kaboom! Find out how explosions are used to demolish large buildings. Demolition experts say it's the safest way. Learn why!

Have you ever wondered how the Hoover Dam was built? Follow along as the Colorado River itself tells you its story! A lot of work went into the construction of this giant dam, but it was worth it—we now have Lake Mead and a way of converting the river’s energy into electricity!

Tugboats are tiny boats that fill a big role. Kids will discover how tugboat push and pull larger boats, like barges, through narrow waterways. Using a thick, strong rope, the tugboat guides big cargo boats through the harbor by helping to turn them.

Ever wonder why a smoke alarm goes off? A battery, siren, and metal can work together to detect smoke and sound the alarm when catching a whiff of smoke.