How long can a tunnel be?

What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. How long can a tunnel be?

The Big Idea

Some tunnels are so long they go under whole mountains! The longest train tunnel goes under the Alps. Let's measure some giants.

Train Tunnel

Step one: Train Tunnel. The Gotthard Base Tunnel in Switzerland is a train tunnel about 35 miles long. It goes under the Alps.

Road Tunnel

Step two: Road Tunnel. The longest road tunnel, in Norway, is about 15 miles long. Drivers have rest spots along the way.

Water Tunnel

Step three: Water Tunnel. Water tunnels can be even longer. One in New York is about 85 miles long. Long tunnels take years to build, with lights, air, and safety exits along the way.

A Closer Look

Let's take a closer look! Train tunnels go under mountains. Road tunnels need fresh air. Water tunnels carry drinking water. Safety exits are built along the way.

Quick Facts

Quick facts! Trains in the Gotthard tunnel cross the Alps in about 20 minutes. The Gotthard Base Tunnel took many years to build. Lights and signs guide drivers through long tunnels. Water tunnels bring drinking water to big cities.

Think Like a Scientist

Now, think like a scientist! Find a map of your area with a grown-up. Use the map scale to measure 35 miles. Stretch a string that far from your home. Where does it reach? Imagine a tunnel that long!

Outro

Tunnels can be very long. The Gotthard Base Tunnel runs about 35 miles under the Alps, the longest road tunnel is about 15 miles, and a New York water tunnel is about 85 miles. Science is amazing! What will you discover next? Every question is a new adventure, so keep wondering and keep exploring with me! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!