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1. The opposite of brittle is ___. Answer tough
2. The opposite of hard is ___. Answer smooth
3. A ___ material does not bend easily. Answer rigid
4. ___ is the rubbing of one surface on another. Answer Friction
5. A ___ material bends easily. Answer flexible
6. A material that is ___ allows water, gas, etc. to pass through it. Answer permeable
7. Materials which are ___ do not dissolve. Answer insoluble
8. A material or substance that is ___ has the power to move spontaneously. Answer motile
9. You cannot see through ___ materials, and light cannot pass through them. Answer opaque
10. You cannot see through ___ materials, but light passes through them. Answer translucent
11. One ___ of steel is toughness. Answer property
12. Chalk is ___ because it easy to scratch. Answer soft
13. Some materials have a ___ surface; they produce little friction when rubbed on another surface. Answer smooth
14. An example of a ___ material is glass. Answer brittle
15. An example of a ___ material is steel. Answer tough
Copyright 2002 by Ann Marris (ann.m@hsc.kuniv.edu.kw) If you like quizzes, visit Self-Study Quizzes for ESL Students.