A cube, a sphere, a cone, a cylinder. These are solid. You can pick them up.
Step 1: Let's Learn
Read it, or press Listen and follow the words.
Flat shapes are different
A square is flat, like a drawing on paper. A cube is a box. A drawing of a cube is still flat.
Solids are made of flat shapes
Every face of a cube is a square. The flat shapes you know are the parts solids are built from.
Roll it or stack it
Round ones roll. Ones with flat faces stack. That is a test you can do with your hands.
Some do both
A cylinder rolls on its side and stacks on its ends. It has flat faces and a curved one.
Step 2: Try It Yourself
Tap and try it out.
Cube
Flat faces
6
Does it roll?
No
A cube has 6 square faces.
Step 3: Watch an Example
One step at a time.
Watch Mia Sort by Rolling
Mia has a ball and a box.
- Step 1
She pushes the ball and it rolls away.
Step 4: Your Turn
Practice makes it stick.
The Ball
Problem 1 of 1
Does a ball roll or stack?
Solid or Flat
1 of 4
How many flat faces does a cube have?
2 of 4
Does a box stack?
3 of 4
Is a square flat or solid?
4 of 4
Does a can roll?
Step 5: Quick Check
Show what you know.
Question 1 of 1
How many flat faces does a cube have?
What You Learned
- Solid shapes can be held; flat shapes cannot.
- Round ones roll, flat-faced ones stack.
- A cube has six flat faces.