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Book 24, Question 4 · Video

What is bedrock?

Video · 1:58 · Crafty Clover explains, from A Million Whys Book 24

Bedrock is the solid rock that lies beneath all the soil and loose stones. It may be only a few inches below the surface, or hundreds of feet down. Soil forms slowly as wind, water, ice, and roots break the top of the rock into smaller pieces. In some places, like along cliffs and mountains, you can see the bedrock itself.

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What Crafty Clover says in this video

Intro

Hi there, curious minds! I'm Crafty Clover! Let's discover something amazing. What is bedrock?

The Big Idea

Under all the soil and loose stones is solid rock. It is called bedrock. It is like the floor under the ground!

Under Everything

Step one: Under Everything. Bedrock is the solid rock that lies beneath all the soil and loose stones. It may be only a few inches below the surface, or hundreds of feet down.

Making Soil

Step two: Making Soil. Soil forms slowly as wind, water, ice, and roots break the top of the bedrock into smaller pieces. Over a very long time, those pieces become part of the soil.

Seeing Bedrock

Step three: Seeing Bedrock. In some places, like along cliffs and mountains, you can see the bedrock itself. Roads cut through hills can show it too.

A Closer Look

Let's take a closer look! Wind wears rock down. Water seeps into cracks. Ice pushes cracks wider. Roots split rock apart.

Quick Facts

Quick facts! Much of northern Canada sits on very old bedrock called the Canadian Shield. Many tall buildings rest their foundations on bedrock. Cracks in bedrock can hold water, and some wells reach it. Turning bedrock into soil takes a very long time.

Think Like a Scientist

Now, think like a scientist! With a grown-up, find a place where bare bedrock shows, like a rocky outcrop. Stay away from cliff edges and loose rocks. Draw the rock. Look for cracks and mark them on your drawing. What do you think made the cracks?

Outro

Bedrock is the solid rock under all the soil and loose stones. Wind, water, ice, and roots slowly break its top into the pieces that become soil. Science is amazing! The world under your feet is full of surprises. Keep digging into big questions, 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!

Why I wrote this