THIS DAY IN SCIENCE: Post and Gatty attempt to circumnavigate world in 1931

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There’s nothing like a good hand warmer in your glove when you’re skiing. But how do they work? Our science guy Steve Spangler uncovers the science secret that makes your hand warmer work. Contact Steve Spangler at steve@stevespangler.com Contact Steve’s business...
Heat in the Environment Mini Unit Overview

Heat in the Environment Mini Unit Overview

by LOUISE VAILLANCOURT. Can understanding particle theory and heat transfer modes help you build efficient devices to improve our daily lives? Learning goal Heat is a form of energy that can be transformed and transferred. These processes can be explained using...
What is entropy?

What is entropy?

  There’s a concept that’s crucial to chemistry and physics. It helps explain why physical processes go one way and not the other: why ice melts, why cream spreads in coffee, why air leaks out of a punctured tire. It’s entropy, and it’s notoriously difficult to...
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