Think and Wonder

What are some things that roll?

Describe their shape. What are some things that stack? Describe their shape.

Now:

Make predictions about whether your

20 solids will ROLL or STACK and test

them. -

In your Laboratory Record Book (LRB): •Place the solids in the “ROLL” circle, the “STACK” circle, or in the overlapping part of the circles if the object can both roll and stack.•Write the names of the objects in the part of the circle(s) in which they belong.

Link to LRB

Drag the objects to their place in the diagram:

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Roll Stack

•Do all the round solids roll?•Do all the solids with flat sides stack?•Why do you think the cork and the acrylic cylinder both roll and stack?•Which solids would you use to build a tower? Why?

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Consider:

In your Laboratory Record Book (LRB): •Record the names of the properties we investigated today on the “Properties of Solids” chart (Lesson 2 in your LRB), lines 3 and 4 of the first column. •Record the question the we can ask to help us observe each of the new properties on lines 3 and 4 of the second column.

Link to LRB

In your Laboratory Record Book (LRB): Today I learned why some solids stack and some solids roll. A ________ rolls because__________________________.A _______ stacks because___ _____________________.

Link to LRB

Partner Groups:

Take inventory of your bag of 20 solids:

Blue objects: plastic spoon, rubber ball, wood cube bead, Unifix CubeRed objects: wood golf tee, pipe cleaner, octagon jewel, plastic buttonMetal objects: steel ball, steel washer, steel nut, paper clip, brass washer, bobby pinWhite objects: Ping-Pong ball, small taster spoonTransparent objects: plastic cup lid, acrylic cube, acrylic cylinderCork

Return your materials to the Blue Science Bins.