Sphere
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Glass Sphere. Balls and marbles are shaped like spheres. |
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Largest Volume for Smallest SurfaceOf all the shapes, a sphere has the smallest surface area for a volume. Or put another way it can contain the greatest volume for a fixed surface area. Example: if you blow up a balloon it naturally forms a sphere because it is trying to hold as much air as possible with as small a surface as possible. Press the Play button to see. In NatureThe sphere appears in nature whenever a surface wants to be as small as possible. Examples include bubbles and water drops, can you think of more?
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The EarthThe Planet Earth, our home, is nearly a sphere, except that it is squashed a little at the poles. |
It is a spheroid, which means it just misses out on being a sphere because it isn't perfect in one direction (in the Earth's case: North-South) |
Other Cool Spheres
Torus
Cylinder
Cone
Prisms
Polyhedron
Platonic Solids