📚 Topic Summary
3D shapes have different properties that determine how they move and interact with each other. Whether a shape rolls, stacks, or slides depends on its faces, edges, and vertices. Spheres roll because they have a curved surface. Cubes and rectangular prisms stack because they have flat faces. Cones can both stack (on their flat base) and roll (on their curved surface), and cylinders do the same! Understanding these properties helps us predict how objects will behave in the real world.
➗ Part A: Vocabulary
Match the term with its definition:
| Term |
Definition |
| 1. Cube |
A. A 3D shape with one circular face and a curved surface |
| 2. Sphere |
B. A 3D shape with six square faces |
| 3. Cylinder |
C. A 3D shape with no faces, edges, or vertices |
| 4. Cone |
D. A 3D shape with two circular faces and a curved surface |
| 5. Rectangular Prism |
E. A 3D shape with six rectangular faces |
✍️ Part B: Fill in the Blanks
Fill in the missing words in the following paragraph:
A ______ has a curved surface and can ______. A ______ has flat faces and can ______. A ______ can do both because it has a circular face and a curved surface.
🤔 Part C: Critical Thinking
Can you think of a real-world object for each shape (cube, sphere, cylinder, cone, and rectangular prism) and describe how its shape helps it perform its function?