Showing results for "Science and the Media" in How Things Work

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.

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!

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!

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.

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

How does a seed become a yummy ear of corn? A farmer plants seeds. The seeds change into plants. Plants grow. Soon cobs grow on the plants. Learn about the life cycle of corn step by step.

How does a swimming tadpole become a hopping frog? A tiny tadpole leaves its egg. It swims and eats. Its tail gets longer. Soon back legs grow. Then front legs grow. Follow the frog's life cycle step by step.

How does milk become delicious ice cream? A farmer milks cows. The milk is mixed and heated. Next a worker adds flavors. The mix gets cold. Listen to what happens step by step as ice cream is made....

How does salt go from the sea to flavoring your food? Workers pump seawater into ponds. Salt crystals form as the water dries up. See what happens step by step in the process of making salt.

Where does milk come from? Cows eat grass. They make milk in their bodies. Next a farmer uses a machine to take milk from the cows. Then what happens? Follow the story of milk step by step.