The following materials are useful EXCEPT (A) Drained batteries B. Eco bag C. Empty bottle D. Old newspaper The following materials are harmful EXCEPT A. Used paint brush B. Empty mayonnaise jar C. Empty disinfectant bottle D. Empty hair gel container Materials that serve a purpose can be reused such as containers for any solid or liquid substances. A. Good B. Bad C. Useful D. Harmful Materials that bring hazards, harm to our health, environment and other organisms when not used properly. A. Good B. Bad C. Useful D Harmful It is caused by the reaction of iron with oxygen present in air. C. Burning D. Changing B. Combustion A. Rusting The rapid chemical combination of a substance with oxygen, involvin the production of heat and light. A. Rusting B. Combustion 8 C. Heat D. Light SS It is a form of energy described as how high the temperature is and can bring about physical change in matter. Burning B. Combustion C. Heat D. Light
Answer (2)
QUESTION:Which of the following is an example of a physical change?a. Burning woodb. Cooking an eggc. Cutting a piece of clothd. Rusting metalANSWER:c. Cutting a piece of cloth
Answers:1. The following materials are useful EXCEPT:A. Drained batteries (They are no longer useful and should be disposed of properly.)2. The following materials are harmful EXCEPT:A. Used paint brush (Unlike the other items, it does not contain harmful chemicals.)3. Materials that serve a purpose can be reused such as containers for any solid or liquid substances.C. Useful4. Materials that bring hazards, harm to our health, environment, and other organisms when not used properly.D. Harmful5. It is caused by the reaction of iron with oxygen present in air.D. Rusting6. The rapid chemical combination of a substance with oxygen, involving the production of heat and light.B. Combustion7. It is a form of energy described as how high the temperature is and can bring about physical change in matter.C. Heat
