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Book 24, Question 120 · Video

What causes a landslide, and what are the warning signs?

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

A landslide happens when a slope of soil and rock slides downhill. Heavy rain, melting snow, or an earthquake can make the ground heavy and slippery. Tilted trees, new cracks in the ground, muddy springs, and falling pebbles can be warning signs. If you see them, move away to the side, not down the hill, and tell a grown-up.

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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 causes a landslide, and what are the warning signs?

The Big Idea

Sometimes a whole slope of soil and rock slides downhill. That is a landslide. Knowing the warning signs helps keep you safe!

Causes

Step one: Causes. A landslide happens when a slope of soil and rock slides downhill. Heavy rain, melting snow, or an earthquake can make the ground heavy and slippery.

Warning Signs

Step two: Warning Signs. Tilted trees, new cracks in the ground, muddy springs, and falling pebbles can be warning signs. They mean the slope may be moving.

Stay Safe

Step three: Stay Safe. If you see warning signs, move away to the side, not down the hill, and tell a grown-up. Plant roots help hold slopes in place.

A Closer Look

Let's take a closer look! Trees start to tilt. New cracks appear. Muddy water seeps out. Pebbles start falling.

Quick Facts

Quick facts! Slopes with no plants are the easiest ones for rain to wash away. Tree and grass roots help hold slopes together. Scientists use sensors to watch risky slopes. Always move to the side of a landslide, not down the hill.

Think Like a Scientist

Now, think like a scientist! Pile damp sand on a tray and tilt one end a little. Sprinkle water on top with a cup. Watch how the pile slumps. Now push twigs in as pretend roots and try again. Did the roots help?

Outro

A landslide happens when heavy rain, melting snow, or an earthquake makes a slope slide. Watch for tilted trees, new cracks, muddy springs, and falling pebbles, and move to the side. Science is amazing! Keep asking questions! The more you look around, the more wonders you will find, so keep your eyes open! Crafty Clover can be found on Amazon Books, Google Bookstore, and Apple Books. Available for purchase or download! Bye for now!

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