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Book 27, Question 33 · Video

Why do the crystals in a geode point toward the middle?

Video · 1:44 · Crafty Clover explains, from A Million Whys Book 27

Crystals grow from wall surfaces outward into any open space. In a geode, the wall is the starting place, so each crystal sprouts from the wall and points into the empty middle, where it has the most room. Crystals growing next to each other squeeze and compete, which is why some are thin at the base and wider at the tip. It looks like a tiny crystal cave.

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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. Why do the crystals in a geode point toward the middle?

The Big Idea

Peek inside a geode. All the crystals point toward the middle! Why is that?

From the Walls

Step one: From the Walls. Crystals grow from wall surfaces outward into any open space. In a geode, the wall is the starting place.

Most Room

Step two: Most Room. Each crystal sprouts from the wall and points into the empty middle, where it has the most room. It looks like a tiny crystal cave.

Squeezing

Step three: Squeezing. Crystals growing next to each other squeeze and compete. That's why some are thin at the base and wider at the tip.

A Closer Look

Let's take a closer look! Walls start growth. Crystals sprout. They point inward. Neighbors squeeze.

Quick Facts

Quick facts! Amethyst geodes can be purple because of tiny amounts of iron. Most room in the middle. Crystals compete for space. A tiny crystal cave.

Think Like a Scientist

Now, think like a scientist! Draw a big circle. Add pointy triangles growing from the edges. Point them toward the center. Color them purple like amethyst. You've drawn a geode!

Outro

Crystals in a geode point toward the middle because they grow outward from the walls into the open space, where there's the most room. Neighbors squeeze and compete, making some wider at the tip. 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!

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