Book 25, Question 68 · Video
What is under a city street?
Under a city street lie many hidden layers. Large sewer pipes are often deepest, with water mains above them. Electric cables, telephone and fiber lines, and gas pipes lie nearer the surface. In some cities, subway tunnels and steam pipes share the space. Each system has its own depth and location. Maps and markings tell workers what is where.
Read the full answer →Watch on YouTubeSee the series on Amazon
What Crafty Clover says in this video
Intro
Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. What is under a city street?
The Big Idea
A city street looks solid. But underneath is a crowded world! Let's peek below.
Deepest
Step one: Deepest. Under a city street lie many hidden layers. Large sewer pipes are often deepest, with water mains above them.
Nearer the Top
Step two: Nearer the Top. Electric cables, telephone and fiber lines, and gas pipes lie nearer the surface. Each system has its own depth and location.
Sharing Space
Step three: Sharing Space. In some cities, subway tunnels and steam pipes share the space. Maps and markings tell workers what is where.
A Closer Look
Let's take a closer look! Cables are shallow. Gas pipes are near the top. Water mains are deeper. Sewers are deepest.
Quick Facts
Quick facts! Some streets have so many pipes that crews must dig very carefully. Colored paint marks on the road show where lines are buried. Grown-ups should always call before digging. Subways share the space.
Think Like a Scientist
Now, think like a scientist! Draw a cross-section of a street. Show at least five kinds of pipes and wires. Put them at different depths. Label each one. Which is deepest?
Outro
Under a city street lie hidden layers: sewers deepest, water mains above, then gas pipes and electric and fiber cables near the top, sometimes with subway tunnels too. Science is amazing! Remember, every big discovery starts with a small question. Keep looking, keep learning, and keep asking why! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!