1) 1. Which of the following is useful in cooking? a) Wine  b) fish sauce               c) Insecticide d) bath soap 2) It is useful but harmful when not properly kept? a) Knife b) cellphone c) soy sauce d) computer 3) Which is the best material for disinfecting our house floor? Which is the best material for disinfecting our house floor?  a) Bleach b) Domex c) Soap d) vinegar 4) Which of these materials are harmful? a) Firecracker b) Insecticides c) rust iron d) All of these 5) Improper disposal of waste materials like empty bottles, pampers, cigarette butts are strictly prohibited because it is_____. a) Useful b) harmful c) beautiful d) none of the above

Self -check activity Week 1 Useful and Harmful Materials

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