3D Shapes Introduction — Answer Key
Part A: Multiple Choice
Circle the best answer for each question.
1. Mia has a beach ball. What shape is it?
A) Sphere
B) Cube
C) Cone
D) Cylinder
A beach ball is a sphere because it is round on every side.
2. Jay stacks 4 blocks that have 6 equal sides. What are they?
A) Spheres
B) Cubes
C) Cones
D) Cylinders
Blocks with 6 equal square faces are cubes, perfect for stacking neatly.
3. A traffic cone fell over and could roll a little. Why?
A) It is a sphere
B) It has 8 vertices
C) It has a curved side
D) It has 6 faces
Cones can roll because their side is curved, even with one flat circle.
4. Ana sees 3 cans on a shelf. What shape are the cans?
A) Spheres
B) Cubes
C) Cones
D) Cylinders
Cans are cylinders with two circle faces and one curved side surface.
Part B: Fill in the Blank
Write the correct answer on each line.
1. A drum is shaped like a cylinder with two circle faces.
Drums are cylinders because they have two circles and a curved middle.
2. Tim has 2 cubes and 1 sphere. He has 3 shapes total.
Two cubes plus one sphere equals three solid shapes total in all.
3. A shape that rolls but has no flat face is a sphere.
Spheres roll easily because every part is curved with no flat faces.
4. A birthday party hat is shaped like a cone.
Party hats are cones with a circle base and a single pointy top.
5. A flat shape with 4 equal sides is a square, not a cube.
A square is the flat 2D shape; a cube is its 3D solid version.