In science, we classify objects based on their ability to change shape under force. Rigid items maintain their shape even when force is applied (like a brick or a metal bar). Flexible items, on the other hand, easily change shape when force is applied and return to their original shape when the force is removed (like a rubber band or a piece of cloth). This worksheet will help you practice identifying different materials as either flexible or rigid!
Match the following terms with their correct definitions:
| Term | Definition |
|---|---|
| 1. Rigid | a. The ability of a material to return to its original shape after being deformed. |
| 2. Flexible | b. A force that resists the deformation of an object. |
| 3. Deformation | c. The extent to which an object resists bending or flexing. |
| 4. Elasticity | d. The change in shape or size of an object due to applied forces. |
| 5. Stiffness | e. Not easily bent or changed in shape; stiff. |
Match each term (1-5) to its corresponding definition (a-e).
Complete the following paragraph using the words provided below:
A __________ object is one that can be easily bent or shaped without breaking. This is because it lacks __________. When a force is applied, the object undergoes __________, but it returns to its original shape when the force is removed, demonstrating __________. In contrast, a __________ object maintains its shape even under pressure.
Words: rigid, flexible, deformation, elasticity, stiffness
Explain how the properties of flexibility and rigidity are important in the design of everyday objects. Give at least two examples.
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