The Three Types of Rocks– Our Activities and a Free Worksheet Packet about igneous, sedimentary and metamorphic rocks

A few days ago I shared the Rocks and Minerals Packet I made for ED. I wanted to spend more time on the three types of rocks–igneous, sedimentary and metamorphic rocks.  The kids were SO excited when they realized this activity was going to include semi-sweet chocolate chips, white chocolate chips, peanut butter chips, heath crunch bits and flaked coconut. (No we didn’t eat it all, but we did taste test a bit along the way!) I used that as leverage to make sure the rest of their work was done for the day!

I made some worksheets for their science notebooks. Before beginning our activities, we went over the differences between the three types of rocks (the first page) and sang our song again (below).  We saved the examples (the pages with the pictures of various examples of rocks) for another day. The packet includes some sample example answers for each page (such as the metamorphic rock page in the collage below).  This packet also includes the activities I shared below.

Three Types of Rocks Packet

Our types of rock ‘experiments’

We had different types of chips: white chocolate chips, semi-sweet chocolate chips, peanut butter chips plus shaved coconut and heath crunch bits.

Igneous Rocks: We melted some white chocolate (and red dye) on the stove.  We talked about how magma/lava is melted rock. Then we took spoonfuls of the melted chocolate and let it cool on a baking sheet.  These were our ‘igneous’ rocks.

Sedimentary Rocks: Before we began, we hammered the chips in a ziploc bag to make them smaller. We put spoonfuls of the different types of chips into a jar.  Those were the sediments. We applied pressure to squeeze the rock/chocolate layers together to create sedimentary rocks:

Metamorphic Rocks: We put layers of chocolate chips and mini-marshmallows into a pan that could be baked in the oven. We put the pan in the oven and let it heat up for 10 or 15 minutes.  We took it out, let it cool for a few minutes and then applied pressure to the top of half the mixture.  This transformed the “rocks/chips” into a new concoction whereas on the other side we could see distinct layers and distinct rock forms (like sedimentary rocks).

After it cooled we cut the “rock” up and looked at the layer, noticing how on the metamorphic side the “rocks” had blended into one another.

You can do these same kinds of activities with shaved crayons. I saw that over at The Adventures of Bear they did the rock cycle with crayons and had some really great results! Be sure to check it out!

Rock Cycle Song

I’m sorry to say I can’t find the exact link to this song, so if you know who I should give credit to let me know.  The kids and I have been singing this all week (to the tune of “Row, Row, Row Your Boat”):

Sedimentary rock
Has been formed in layers
Often found near water sources
With fossils from decayers

Then there’s igneous rock
Here since Earth was born
Molten Lava, cooled and hardened
That’s how it is formed

These two types of rocks
Can also be transformed
With pressure, heat and chemicals
Metamorphic they’ll become

If you missed these last week,  you might also be interested in the 26-page Rocks and Mineral Packet I shared.  It covers things like how rocks are used, some famous rocks in the world, how minerals are used in our homes, birthstones and things like that. Pages 1-13 are for younger kids (preK or K); pages 14-26 are better suited to older kids.

You may also be interested in the free 3-part Montessori cards I made of Famous Rocks Around the World. I shared those in another post:

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  1. [...] of rocks… I made a few different packets to go along with this unit… one on the three types of rocks: sedimentary, igneous and metamorphic rocks, famous rocks around the world (Montessori 3-part cards) that you see above and a 26 page packet on [...]

  2. [...] for my preschooler and half for my older kids). Around that same time I also made some sheets on the three types of rocks: sedimentary, igneous and metamorphic rocks and some Montessori Cards: famous rocks around the world (Montessori 3-part [...]

  3. by Free Rocks and Minerals Packet | The Homeschool Den

    On October 13, 2013 at 3:19 pm

    [...] Three Types of Rocks: Igneous, Sedimentary and Metamorphic Rock Packet - the kids loved these activities because they involved chocolate!! [...]

  4. [...] The Three Types of Rocks: Sedimentary, Metamorphic, Igneous  [...]

  5. [...] Three Types of Rocks: Igneous, Sedimentary and Metamorphic Rock Packet - the kids loved these activities because they involved chocolate!! [...]