Audience: 10 kids
What could unicorns and slime have in common? Well if you like either of these two things, why not come to our STEM book club.
Did you know that scientists that “slime” is actually a term that scientists use? Well its true.
In this STEM program, children will learn the difference between a solid and a liquid.
Key concepts Solid Fluid Viscosity Non-Newtonian fluid
Prep:
Cover Tables
Set up tables with a large bowl.
One volunteer or librarian at each table.
Introduction A rabbit is fluffy, mud is squishy, and a balloon is stretchy. What substances can be fluffy, squishy and stretchy at the same time, and are so much fun to play with? Silly Putty, Gak and slime!
These substances can be confusing, too. Most substances become harder when cooled and flow much better as they warm up. Think of how honey slowly oozes from the bottle on a cold day and rushes out on a hot day.
Slime is different. They can feel as hard as a solid when squeezed in your fist, but as soon as you release your grip, they ooze out through your fingers like a thick liquid. Why would slime be different? In this activity you will make your own slime, play with it and discover what makes it flow
But before we do anything, let's read a little bit about the science of slime. Read the book, Solids and liquids by Joel Sohn. Hand out worksheet. Have children write their names on worksheet.
Go over the definitions of both a liquid and a solid.
Solids consist of tightly packed particles called molecules or atoms that clasp onto each other so the solid holds its shape.
Liquids have particles that can slide over and around one another, allowing the fluid to flow.
Ask children to write down the word, water. Is it a solid or a liquid?
Ask kids to write down the word, book. Show kids a book. Is this a solid or a liquid?
Ask kids to write down the word, slime. Show kids a sample of slime. Is this a solid or a liquid?
Slime is actually both a liquid and a solid. It can be fluffy, squishy and stretchy all at the same time.
Most substances become harder when cooled and flow much better as they warm up. Think of how honey slowly oozes from the bottle on a cold day and rushes out on a hot day. Slime is different. They can feel as hard as a solid when squeezed in your fist, but as soon as you release your grip, they ooze out through your fingers like a thick liquid. Pass slime around.
Why would slime be different? In this activity you will make your own slime, play with it and discover what makes it flow! But before we do this, let's read another book. Read the book, Unicorns 101 by Cale Atkinson. So let's make some unicorn slime!
Have kids go to the craft tables.
4 kids to each table.
Have kids follow directions with the aide of a librarian or volunteer.
Ingredients for Slime:
1 large bowl
4 oz of glue
1 tbsp contact lens solution
1/2 tbsp baking soda
glitter
food coloring
plastic bags (to put slime in to take home)
Directions for Slime:
Put glue in the bowl.
Add the baking soda and mix well. If you are using white or clear glue, add food coloring now.
Add the contact lens solution.
Knead mixture with your hands until it becomes less sticky.
If mixture is still sticky and more contact lens solution.
Ad glitter, a knead until it's mixed in.
Material Needed:
Solid and Liquid Worksheet. (copy of the tool page)
Sample of Slime
Pencils.
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