A sphere is a three-dimensional solid with one continuous curved surface, no flat faces, straight edges, or vertices; its shape remains the same when turned. The learner distinguishes spheres from circles, which are two-dimensional, and from other rounded solids such as cylinders and cones, supporting classification and description of solid shapes and their attributes.
A sphere is a solid shape that looks like a ball.
To identify a sphere:
Example: Which shape is a sphere?
Step 1: Check Shape A, the ball. It is a solid object with one smooth, curved surface. It has no flat faces, edges, or corners. It looks the same when turned.
Step 2: Compare the others. A can has flat circular faces, a party hat has a point and a flat circular face, and a drawn circle is flat, not a solid.
Answer: Shape A, the ball, is a sphere.
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