Inside the Earth
See how it works
We live on the Earth, a big round ball in space. It is made of layers, one wrapped around the next, and the middle is the hottest part. Tap it and look inside!
👆 Tap it to take it apart
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📖 Read along: every part in words
For grown-ups to read aloud. Tap the picture above and Pipi reads it too.
We live on the Earth, a big round ball in space. It is made of layers, one wrapped around the next, and the middle is the hottest part. Tap it and look inside!
Parts
- Rocky layer
- This is the rocky layer we live on. It is thin and cool, and it holds up our houses and our trees.
- Thick hot layer
- Under the rocky layer is the thickest layer of all. It is so hot that the rock goes soft, and it creeps along very slowly.
- Hot metal
- Deeper down there is a ball of hot metal that flows and swirls. It never stops moving, and that makes the Earth a big invisible magnet.
- Hot middle
- Right in the middle of the Earth is the hottest place of all. It is squeezed so hard that it stays solid, and it is just a little smaller than the Moon.
- Air blanket
- All around the Earth is a thin blanket of air. The air we breathe, the clouds and the wind all live in it.
See how it works
Peel
- The layer we live on is thin, like the skin of an apple. Peel it gently away and look underneath.
- Now the thickest layer of all is showing. It is hot and soft, like warm dough, so peeling it takes a bit of pulling.
- Right in the middle are two metal layers. The outer one flows like water, and the middle one is squeezed into a small hard ball.
Spin
- The Earth is always turning round and round. One whole turn takes one day, and we turn with it, so we never feel it move.
- The blanket of air turns with the Earth too. The clouds and the wind ride along and go all the way round.
Compare sizes
- The layer we live on is as thin as a skin. If we could see right through it, we would find the tiny hot middle hiding deep inside.
- Now we can see the sizes. The hot soft layer is the thickest, the two metal layers are much smaller, and the layer we live on is thinnest of all.