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Rock Cycle With Crayons

The document provides instructions for modeling the rock cycle using crayons. Students will create three types of rocks - sedimentary by pressing layers of crushed crayons, metamorphic by heating the sedimentary rock, and igneous by melting and cooling crushed crayons in water. Key differences between the rock types are noted.

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bridget.duncan
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137 views2 pages

Rock Cycle With Crayons

The document provides instructions for modeling the rock cycle using crayons. Students will create three types of rocks - sedimentary by pressing layers of crushed crayons, metamorphic by heating the sedimentary rock, and igneous by melting and cooling crushed crayons in water. Key differences between the rock types are noted.

Uploaded by

bridget.duncan
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
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Model the rock cycle with crayons

Aim: To use crayons to model the rock cycle

Materials (per class)

 2 different coloured crayons (crushed)


 aluminium foil
 access to a hot plate (set up around the class) (set to
medium/low)
 toothpick
 iced water
 oven mitts
 2 small bowls
 2 teaspoons
 heavy mass

Procedure:

1. Place 1 teaspoon of crushed crayon onto a piece of aluminium foil. Add a teaspoon of
a different colour crushed crayon on top of the first layer.
2. Fold the aluminium foil over the top of the pile.
3. Press down as hard as you can with the heavy mass for 1 minute.
4. Remove the heavy mass and unfold the aluminium foil.
5. Carefully peel the aluminium foil away from the crayon shavings and remove the pile.
This is your sedimentary ‘rock’- take a photo and upload it below.

 How did the individual crushed crayon combine to form a


single rock? They used pressure from being pressed to
merge together into a single rock, ours didn’t do that.

6. Return your sedimentary rock to the aluminium foil and place


it on top of the hot plate, press it down flat, and heat it.
7. Use oven mitts to remove the aluminium foil from the hot
plate when the crayon rock has just melted. Watch as it cools, but don’t touch the
melted crayon.
8. Carefully peel the melted crayons from the aluminium foil. This is your metamorphic
‘rock’- take a photo and upload it below.

 What are the differences between this rock and your


sedimentary rock? This rock melted together in a swirl of
colours.

9. Prepare a bowl of ice water.


10. Put the ‘rock’ back on the aluminium foil and return it to the hot
plate. This time, when the crayons melt, stir them with a toothpick until
the colours are mixed completely.
11. Using the oven mitts, quickly lift the aluminium foil and pour the melted crayons into
the bowl of ice water.
12. Remove a chunk of solidified crayon from the bowl. This is your igneous ‘rock’ –
take a photo and upload it below.

 How is this rock different to your sedimentary and metamorphic


rocks?
It is one colour and in one piece and in an interesting shape.
 What are the similarities and differences between your different
types of rock? The metamorphic and igneous formed from heat.
But the sediment was formed by pressure.

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