English 箭头
Podcast Cover

[Seasonal Wonders and Scientific Surprises: The Science of Seasons]-[Two Whats?! And A Wow! - Hot Topic (6/7/24)]

Wow in the World · B1 · 2024-06-07

Preschool Enlightenment
Or study on the web version

📋 Summary

Seasonal Wonders and Scientific Surprises: A 'Two Whats and a Wow' Exploration

In this episode of Wow in the World, hosts Mindy Thomas and Guy Raz engage listeners in their signature scientific game show, "Two Whats and a Wow," focusing specifically on the fascinating phenomenon of seasons. Beyond the seasonal festivities, the episode highlights the physical realities behind climate and temperature shifts.

The Game: Separating Fact from Fiction

To challenge the curiosity of their "Wowzer" audience, the hosts presented three scientific statements regarding seasons and seasonal phenomena, tasking listeners to identify the one true "Wow":

  • Statement A: The Eiffel Tower grows as much as six inches (15 centimeters) in the summer.
  • Statement B: The air directly surrounding a bolt of lightning is actually freezing cold.
  • Statement C: Benjamin Franklin invented the beloved summer treat, the ice pop.

The Scientific Reality

Through the participation of a listener named Glenn from Texas, the correct answer was revealed to be Statement A. The hosts explained the science behind this counterintuitive fact:

1. Thermal Expansion and the Eiffel Tower

The growth of the Eiffel Tower is a textbook example of thermal expansion. Mindy and Guy Raz explained that as temperatures rise during the summer months, the metal frame of the tower absorbs heat, causing the material to expand. This process doesn't just add height—up to 15 centimeters—but also causes the structure to lean away from the sun, shifting as much as 18 centimeters (seven inches) toward the shade as one side heats up more intensely than the other.

2. Debunking Lightning Myths

Regarding Statement B, the hosts clarified that lightning is the antithesis of "freezing cold." In reality, a bolt of lightning generates extreme heat, reaching temperatures of up to 50,000 degrees Fahrenheit (roughly 28,000 degrees Celsius). This is noted as being "about five times hotter than the surface of the sun," proving that the air in its wake is intensely hot rather than cold.

3. The Origins of the Ice Pop

While Benjamin Franklin is credited with inventions like bifocals and swim flippers, Statement C was revealed to be a "What" (a fabrication). The ice pop was actually the result of an accidental discovery by an 11-year-old named Frank Epperson in 1905, who left a mixture of soda powder and water outside on a chilly night, resulting in a frozen treat.

Hands-On Learning: Operation Ice Fold Tower

To encourage further scientific inquiry, the hosts concluded the episode by inviting listeners to conduct their own experiment called "Operation Ice Fold Tower." By building a tower of ice cubes and applying salt and food coloring, children are encouraged to observe how salt interacts with ice and how these variables influence the melting process. This practical approach reflects the show's mission to help children "learn about their world through play."

Through this blend of humor, trivia, and hands-on experimentation, the episode effectively demystifies natural phenomena, turning the study of seasons into an engaging adventure for young listeners.

🎯Key Sentences

1
It's going to be a November to remember.
2
But for now, let's get on with the show.
3
Whoa, it's freezing in here.
4
Mindy, what are you talking about?
5
You know it.
Expand All

📝Key Phrases

1
music to your ears
2
get on with the show
3
make history
4
soak up the sun
5
reason through
Expand All

📖 Transcript

Grownups, Wondery Plus subscribers can listen to Wow in the World early and ad-free right now.
Join Wondery Plus in the Wondery app or Wondery Kids Plus on Apple Podcasts.
Hey, Wowzer fans, Mindy here.
And before we start the show, I gotta let you know that this November, with a special new episode featuring our friends at Circle Round and Terrestrials on Radiolab for Kids,
And don't miss when Elmo from Sesame Street stops by Wow in the World to make us all belly laugh on November 24th.
Oh, but that's not all, Reg.

ListenLeap Brings You Into Real Context Learning

🎨 Interesting Content
🌍 Real Materials
📱 Listen Anytime
Or study on the web version