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Useful or Harmful SubstancesACTIVITY #1Materials:

Different Pictures of Useful or Harmful MaterialsPasteColored Paper (Red & Green)ScissorsPROCEDURECreate a collage of pictures that are harmful and useful.2. Draw a Traffic Light. Paste all harmful pictures for RED light and useful for GREEN light. 3. Write the word STOP for the RED light and GOfor GREEN light.

RED MEANS STOP: WHAT THINGS WILL HARM YOU? Identify helpful and harmful substances found in the home and school (i.e., medications, vitamins, cough syrup, substance that may cause allergies, products danger symbols, tobacco products) SOAPS

Soaps are mainly used assurfactantsforwashing,bathing, andcleaning, but they are also used in textile spinning and are important components oflubricants.DETERGENT

Adetergentis asurfactantor a mixture of surfactants with "cleaning properties in dilute solutions.MEDICINES

Apharmaceutical drug(also referred to as amedicinal product,medicine,medication, ormedicament) is adrugused todiagnose, cure,treat,orpreventdisease.PRESERVATIVES

Apreservativeis a substance that is added to products such as foods,pharmaceuticals, paints, biological samples, wood, etc. to preventdecompositionbymicrobialgrowth or by undesirablechemicalchanges.

ADDITIVESFoodadditivesare substances added to food to preserve flavor or enhance its taste and appearance.ANTISEPTICS

areantimicrobial substancesthat are applied to livingtissue/skinto reduce the possibility of infection,sepsis, orputrefaction.PESTICIDES

are substances meant for attracting, seducing, and then destroying, or mitigating anypest.DISINFECTANT

areantimicrobial agentsthat are applied to non-living objects to destroymicroorganismsthat are living on the objects.INSECTICIDES

Aninsecticideis a substance used to killinsects.They include ovicides andlarvicidesused against insecteggsandlarvae, respectively.PAINTS

is anyliquid, liquefiable, ormasticcomposition that, after application to asubstratein a thin layer, converts to asolidfilm. It is most commonly used to protect, color, or provide texture to objects.SOLVENTS

Common uses fororganicsolvents are indrycleaning(e.g.,tetrachloroethylene), aspaint thinners(e.g.,toluene,turpentine), as nail polish removers and glue solvents (acetone,methyl acetate,ethyl acetate), in spot removers (e.g.,hexane, petrol ether), in detergents (citrus terpenes) and inperfumes(ethanol).SYNTHETICS

Something made of artificial material, not natural items, can be described assyntheticPLASTIC

is a material consisting of any of a wide range of synthetic or semi-synthetic organics that are malleable and can be molded into solid objects of diverse shapes.SODIUM BICARBONATEOr BAKING SODA

is useful not only for baking, but also for medicinal and household purposes.Seatwork:Answer, on p.12 letter B Science Wonders