The Learning Ark. It fit in perfectly with our Earth Science unit. There is also a similar activity using a hard-boiled egg in the book we are using for this unit, How the Earth Works by Michelle O'Brien-Palmer. One of the other books we are using, Planet Earth/Inside Out by Gail Gibbons, had some really good description and discussion of the layers of the earth. We used those books along with cards from Free Montessori.org to talk about the inner core, out core, mantle and crust.
As we read about each layer, we colored playdough and added a new layer. We started with a small sphere. We kept adding layers until the ball was covered by the crust:
|Then LD looked at the globe and tried to add the continents and oceans. Would you believe, poor LD's place of birth, Australia, didn't really fit onto his globe??! He stuck on a tiny, tiny piece of green playdough but it wasn't much to scale!|
|Then LD wondered what we'd do with it. His eyes got wide when I pulled out a butcher knife!|
|But he got right into slicing the world apart!|
|We were pretty excited by the results. The layers showed up really clearly!|
|And we could even talk about how different areas were thicker and thinner.|
|Just to mention--I made a large pot of playdough for the girls in the morning and we added the colors later in the day. If you don't add the colors when you're first making playdough BE SURE to wear gloves!!|
|EARLIER IN THE DAY: The girls were happy with a very light pink -- and this worked well for our layers of the earth colors later. Even the inner core looks pretty yellow (the color we decided upon).|
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