Hi guys! I know so many of you enjoyed our STEAM class, that I thought it would be fun to continue while we are home. This is completly VOLUNTARY, and there are no grades associated with it. JUST FUN! I will be posting a weekly STEAM challenge with materials that you would typically have at home. If you make it, you will post it to flipgrid and then we can all see it and make comments. If you do not have the materials at home, you can still particpate by looking at other people's projects and making comments. The link to the flipgrid is:
Here is the first challenge...it will run from March 20th-March 27th.
What you will need:
- wax crayons in 3 contrasting colours (we used two of each color, which made plenty of “rocks”)
- sharp knife or grater (or pencil sharpener – see below)
- tin foil (or metal cupcake cases)
- very hot water
- rolling pin or heavy book
- candle (optional and with parent permission)
- iced water (optional)
- kitchen paper (optional)
Simulating the rock cycle – What you do
1. Grate or chop the crayons into small pieces, keeping the colours separate.
This represents weathering and erosion.
2. Sprinkle a layer of each color crayon into a small piece of tin foil.
Depositing of (crayon) sediments
This is the laying down of sediments.
Fold up the foil (or put another piece on top) and press down on it very hard.
This simulates the pressure that creates sedimentary rock.
Unwrap your foil and examine your sedimentary rock. (take a picture if you can so you can share it with us)
3. Rewrap your squished crayon (sedimentary rock) and heat it by dunking it in very hot water for a few moments, then squish it some more. You could also use other metamorphic crayon-rocks or igneous crayon-rocks to make your metamorphic rock.
This represents heat and extreme pressure inside the Earth, which creates metamorphic rock. (Take a picture if you can)
4. Rewrap your heated, squished “metamorphic rock”. This time dunk it in the very hot water for long enough for the crayon to melt completely. Alternatively, briefly hold your foil packet in a candle flame which will melt your crayon more quickly. (Again, you can also use sedimentary or igneous crayon-rocks to make igneous crayon-rocks.)
Melting (crayon) rocks in hot water to create igneous (crayon) rocks
The melted then cooled crayon represents igneous rock.
Let some of your melted crayons cool slowly, as would happen when magma cools slowly inside the Earth to create intrusive igneous rocks. Dunk other melted crayons (in their foil packet) in icy water to represent the fast cooling that takes place when lava cools outside the Earth, creating extrusive igneous rocks.
Once you have completed the STEAM challenge, please use the FLIPGRID link below and show us your "rocks"! Hope to see lots of you guys!