Choose the letter of the best answer, 1. It is the change of matter in form only, not in composition A. Physical Change B. Chemical Change c. Environment Change D. None of these 2. Conductivity is the ability of a material to allow heat and electricity pass through it. Which of the following is a good example of conductivity? A. Glass B, Metal C, Plastic D. Rubber band 3. Not all hard materials are unbreakable, though there are solid materials that when subjected to high stress or pressure, crumble or break easily. What do you call this property? A. Brittleness B. Elasticity C. Hardness 4. Some materials can be bent without breaking. Example are plastic and metal wires. These materials exhibit A. Hardness B. Elasticity C. Flexibility D. Ductility 5. Some materials such as paper and cloth can absorb liquid well. These materials exhibit A. Brittleness B. Malleability C. Ductility D. Porosity 6. Which are both combustible and flammable? A. Cloth B. Gasoline C. Plastic D, Wood 7. What chemical property does a rusty nail show? A. Biodegradability C. Flammability B. Combustibility D. Reactivity 8. It is caused by the reaction of iron with oxygen present in the air. A. Burning B. Flamming C. Rusting D. Cutting 9. All of the following are observed whenever a material undergoes chemical change except A. Formation of new product C. Release of heat B. Formation of gas D. Changes in form but not in composition 10. Which of the following is the ability of the material to easily decompose? A. Biodegradability C. Ductility B. Brittleness D. Porosity 11. Which common property is evident when crown caps or 'tansan' can be hammered into sheets to make a doormat or an improvised tambourine? A. Elasticity C. Hardness B. Flexibility D. Malleability 12. Why cooking pots are not made of wood, plastic, or paper? 1. Wood, plastic and paper are combustible II. Paper is not waterproof III. Plastic will melt in too much heat IV. Wood is not a good conductor of heat A. I only C. II, III and IV B. II and III only D. I, II, III and IV
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