Volcanoes & Rain

In this episode of Beakman’s World, Beakman answers a Colorado viewer’s question about where puddles go after it rains by explaining the water cycle, then welcomes a costumed Galileo to settle an old argument about gravity, before finishing with a cherry pie explanation of how volcanoes erupt. Lester gets dragged into the demonstrations as usual, and Don and Herb weigh in from the South Pole.

In this episode you will discover:

• Where a puddle actually goes after the sun comes out
• How evaporation and condensation keep the water cycle going
• Why a dropped eggplant and a dropped sheet of paper don’t always land together
• What is really happening inside the Earth to cause a volcano to erupt
• The difference between magma and lava
• Which fish can disguise itself to match a checkerboard

Earth’s two heat engines

Rain and volcanoes look like two completely different topics, but Beakman treats them as two sides of the same idea: Earth has two heat engines constantly moving matter in cycles. The Sun powers one from the outside, warming puddles until the water turns to vapour, rises, cools, and falls again as rain. The planet’s own interior heat powers the other from within, building up pressure in pockets of melted rock until it forces its way out as a volcanic eruption. Different direction, different material, same basic pattern, heat moving stuff around and around.

Beakman’s demonstrations

To answer Alan Baker’s question about puddles, Beakman builds one from scratch with “French rain,” a yellow plastic sun, and a sheet of plastic wrap standing in for rising water vapour, walking through evaporation and condensation step by step until the puddle reappears as rain. For volcanoes, he swaps the model for a cherry pie: the crust is the pastry, the cherries are hot rock deep underground, the filling is lava once it escapes, and the steam is the gas building up pressure inside, right before the whole thing erupts over the studio.

Try this at home

The paper and eggplant drop. Drop a flat piece of paper and something heavier, like an eggplant, from the same height at the same time, with an adult. The heavier object will hit the ground first. Now scrunch the paper into a tight ball and try again: dropped together, they land at exactly the same time, because gravity pulls on both equally and it was air resistance slowing the flat paper down, not weight.