3D Shapes Introduction — Answer Key
Part A: Fill in the Blank
Write the missing word or number on each line.
1. A sphere has zero flat faces.
A sphere is curved everywhere, so it has zero flat faces to slide on.
2. A cube has six square faces.
A cube has six equal flat square faces, which is why it slides easily.
3. Items that roll go in the round group.
Round shapes like spheres and balls belong in the rolling group.
4. A cone has one circle face on the bottom.
A cone has one flat circle face on the bottom and a curved side up to the tip.
5. A cube is the same as a square block.
A cube is a square block with six equal flat faces all the same size.
6. A cylinder has two circle ends.
A cylinder has two flat circle faces at the top and bottom.
7. A pyramid stands on a flat base.
A pyramid sits flat on its base while the slanted sides rise to a tip.
8. Spheres and cones can both roll.
Both shapes roll because they have curved sides that touch the floor.
9. Sort flat-sided shapes into the slide pile.
Cubes and prisms go in the slide pile because flat faces glide on tables.
Part B: Matching
Match each item on the left to the correct answer on the right.
1. Match each item to its correct answer.
Ball
→ Sphere rolls
Sphere rolls
Block
→ Cube slides
Cube slides
Party hat
→ Cone rolls in circle
Cone rolls in circle
Soup can
→ Cylinder rolls and stops
Cylinder rolls and stops
Each everyday item is shaped like a 3D solid with its own special way of moving.