PHYSICAL PROPERTY CHEMICAL PROPERTY



PHYSICAL AND CHEMICAL PROPERTIESDirections: Read the accompanying article on physical and chemical properties and fill in the answers below:Define Properties:Define Physical Properties:5 examples of physical properties:1.2.3.4.5.Define Chemical Properties:5 examples of physical properties:1.2.3.4.5.PHYSICAL AND CHEMICAL PROPERTIES AND CHANGESPHYSICAL PROPERTY ???????????????CHEMICAL PROPERTY1. observed with senses ???????????????????????????????????????????????1. ?indicates how a substance2. determined without changing matter ??????????????????????????????reacts with something else???????????????????????????????????????????????????????????????????????????????????????2. matter will be changed into a new????????????????????????????????????????????????????????????????????????????????????????????substance after the reactionIdentify the following as a chemical (C) or physical property (P): ????1. ?blue color ?????????????????????????????????????????????????????????????????????? ????8. ?melting point ????2. ?density ?????????????????????????????????????????????????????????????????????????? ????9. ?reacts with water ????3. ?flammability (burns) ?????????????????????????????????????????????????????? ???10. ?hardness ????4. ?solubility (dissolves) ????????????????????????????????????????????????????? ???11. ?boiling point ????5. ?reacts with acid ????????????????????????????????????????????????????????????? ???12. ?luster ????6. ?brittleness ???????????????????????????????????????????????????? ????13. ?odor ????7. ?sour taste ??????????????????????????????????????????????????????????????????????? ???14. ?reacts with air???????????????????????????????????????????????????????PHYSICAL CHANGE ??????????????????????CHEMICAL CHANGE1. ?a change in size, shape, or state ??????????????????????????????1. ?a change in the physical and2. ?no new substance is formed ??????????????????????????????????????????chemical properties????????????????????????????????????????????????????????????????????????????????????????2. ?a new substance is formedIdentify the following as physical (P) or chemical (C) changes. ??1. ?NaCl (Table Salt) dissolves in water. ?????????????????????????9. ?Milk sours. ??2. ?Ag (Silver) tarnishes. ?????????????????? ???????????????????10. ?Sugar dissolves in water. ??3. ?An apple is cut. ??? ??????????????????????????????????????????11. ?Wood rots. ??4. ?Heat changes H2O to steam. ????????????????????????????????????12. ?Pancakes cook. ??5. ?Baking soda reacts to vinger. ???????????????????????????????????13. ?Grass grows. ??6. ?Fe (Iron) rusts. ??????????????????????????????????????????????????????????14. ?A tire is inflated. ??7. ?Alcohol evaporates ?. ????????????????????????????????????????????????15. ?Food is digested. ??8. ?Ice melts. ??????????????????????????????????????????????????????????????????16. ?Paper towel absorbs water.Physical and Chemical ChangesPart AIdentify whether a Physical (P) or Chemical (C) Change has taken place.1.An ice cube is placed in the sun. ?Later there is a puddle of water. ?Later still the puddle is gone.2.Two chemical are mixed together and a gas is produce.3. A bicycle changes color as it rusts.4.A solid is crushed to a powder.5. Two substances are mixed and light is produced.6. A piece of ice reacts with sodium.7. Mixing salt and pepper.8. Chocolate syrup is dissolved in milk.9. A marshmallow is toasted over a campfire.10. A marshmallow is cut in half.Part BRead each scenario. ?Decide whether a physical or chemical change has occurred and give evidence for your decision. ?The first one has been done for you to use as an example.ScenarioPhysical or Chemical Change?Evidence…1.Yumm! ?A student removes a loaf of bread hot from the oven. ?The student cuts a slice off the loaf and spreads butter on it.2.Your friend decides to toast a piece of bread, but leaves it in the toaster too long. ?The bread is black and the kitchen if full of smoke. 3.You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it. 4.You blow dry your wet hair.5.In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. ?The carbon dioxide bubbles cause the dough to rise.6.You take out your best silver spoons and notice that they are very dull and have some black spots. ?7.A straight piece of wire is coiled to form a spring.8.Food color is dropped into water to give it color.9.Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change.10.In a fireworks show, the fireworks explode giving off heat and light.Part C: True (T) or False (F)1. Changing the size and shapes of pieces of wood would be a chemical change.2.In a physical change, the makeup of matter is changed.3.Evaporation occurs when liquid water changes into a gas.4.Evaporation is a physical change.5.Burning wood is a physical change.bining hydrogen and oxygen to make water is a physical change.7.Breaking up concrete is a physical change.8.Sand being washed out to sea from the beach is a chemical change.9.When ice cream melts, a chemical change occurs.10.Acid rain damaging a marble statue is a physical change.PHYSICAL AND CHEMICAL PROPERTIES AND CHANGES (ANSWER KEY)PHYSICAL PROPERTY ???????????????CHEMICAL PROPERTY1. observed with senses ?????????????????????????????????????????????????1. ?indicates how a substance2. determined without changing matter ??????????????????????????????reacts with something else???????????????????????????????????????????????????????????????????????????????????????2. matter will be changed into a new????????????????????????????????????????????????????????????????????????????????????????????substance after the reactionIdentify the following as a chemical (C) or physical property (P):P ????1. ?blue color ??????????????????????????????????????????????????????????????????????P ????8. ?melting pointP ????2. ?density ??????????????????????????????????????????????????????????????????????????C ????9. ?reacts with waterC ????3. ?flammability (burns) ??????????????????????????????????????????????????????P ???10. ?hardnessP ????4. ?solubility (dissolves) ?????????????????????????????????????????????????????P ???11. ?boiling pointC ????5. ?reacts with acid ?????????????????????????????????????????????????????????????P ???12. ?lusterP ????6. ?brittleness ????????????????????????????????????????????????????P ????13. ?odorP ????7. ?sour taste ???????????????????????????????????????????????????????????????????????C ???14. ?reacts with air???????????????????????????????????????????????????????PHYSICAL CHANGE ??????????????????????CHEMICAL CHANGE1. ?a change in size, shape, or state ??????????????????????????????1. ?a change in the physical and2. ?no new substance is formed ??????????????????????????????????????????chemical properties????????????????????????????????????????????????????????????????????????????????????????2. ?a new substance is formedIdentify the following as physical (P) or chemical (C) changes.P ??1. ?NaCl (Table Salt) dissolves in water. ????????????????????????C ??9. ?Milk sours.C ??2. ?Ag (Silver) tarnishes. ?????????????????? ????????????????????P ?10. ?Sugar dissolves in water.P ??3. ?An apple is cut. ??? ???????????????????????????????????????????????C ?11. ?Wood rots.P ??4. ?Heat changes H2O to steam. ?????????????????????????????????????C ?12. ?Pancakes cook.C ??5. ?Baking soda reacts to vinger. ???????????????????????????????????P ??13. ?Grass grows.C ??6. ?Fe (Iron) rusts. ??????????????????????????????????????????????????????????P ????14. ?A tire is inflated.P ??7. ?Alcohol evaporates ?. ????????????????????????????????????????????????C ???15. ?Food is digested.P ??8. ?Ice melts. ??????????????????????????????????????????????????????????????????P ????16. ?Paper towel absorbs water.Physical and Chemical ChangesPart A1.PAn ice cube is placed in the sun. ?Later there is a puddle of water. ?Later still the puddle is gone.2.CTwo chemical are mixed together and a gas is produce.3.C A bicycle changes color as it rusts.4.P A solid is crushed to a powder.5.C Two substances are mixed and light is produced.6.P + C A piece of ice melts and reacts with sodium.7.P Mixing salt and pepper.8.P Chocolate syrup is dissolved in milk.9.C A marshmallow is toasted over a campfire.10.PA marshmallow is cut in half.Part BRead each scenario. ?Decide whether a physical or chemical change has occurred and give evidence for your decision. ?The first one has been done for you to use as an example.ScenarioPhysical or Chemical Change?Evidence…1.Umm! ?A student removes a loaf of bread hot from the oven. ?The student cuts a slice off the loaf and spreads butter on it.PhysicalNo change in substances.No unexpected color change, temperature change or gas given off.2.Your friend decides to toast a piece of bread, but leaves it in the toaster too long. ?The bread is black and the kitchen if full of smoke.CHEMICAL New black color and solid, gas is produced.(The black is actually pure carbon) 3.You forgot to dry the bread knife when you washed it and reddish brown spots appeared on it.CHEMICAL New color and if left long enough you will see that the new color is also a new solid. 4.You blow dry your wet hair.PHYSICAL Water evaoporates only.5.In baking biscuits and other quick breads, the baking powder reacts to release carbon dioxide bubbles. ?The carbon dioxide bubbles cause the dough to rise.CHEMICAL A new gas is produced which makes the biscuits rise. ?6.You take out your best silver spoons and notice that they are very dull and have some black spots.CHEMICAL New color and if left long enough you will see that the new color is also a new solid. ?7.A straight piece of wire is coiled to form a spring.PHYSICAL Only a change of shape, no new substance is made. 8.Food color is dropped into water to give it color.PHYSICAL Only a change in size from powder to particles to small to see.9.Chewing food to break it down into smaller particles represents a _________ change, but the changing of starch into sugars by enzymes in the digestive system represents a ___________change.PHYSICALCHEMICAL First the teeth just make a change in size, and then the enzymes make a chemical change producing new molecules. Our temperature goes up while we digest from the energy released. 10.In a fireworks show, the fireworks explode giving off heat and light.CHEMICALSubstances giving off heat and light, themselves, is always chemical. What we see in the sky are new colors and light. ?Part C: True (T) or False (F)1.F Changing the size and shapes of pieces of wood would be a chemical change.2.FIn a physical change, the makeup of matter is changed.3.TEvaporation occurs when liquid water changes into a gas.4.TEvaporation is a physical change.5.FBurning wood is a physical change.6.FCombining hydrogen and oxygen to make water is a physical change.7.TBreaking up concrete is a physical change.8.FSand being washed out to sea from the beach is a chemical change.9.FWhen ice cream melts, a chemical change occurs.10.FAcid rain damaging a marble statue is a physical change.PROPERTIES OF MATTERWhat are Physical and Chemical Properties?What are Physical and Chemical Properties? Sounds like a complicated question! It's not if you break it down. What are properties? Properties are the characteristics of a substance which distinguishes it from another substance. In chemistry these properties are called Physical properties and Chemical properties. Most common?substances exist as solids, liquids and gases which have diverse?physical?and?chemical?properties. Matter can undergo physical and chemical changes called Phase Changes.What are?Physical Properties?Definition: Physical properties are the characteristics can be observed without?changing?the substance into another substance. Physical properties of matter are usually those that can be observed using our senses. The observations usually consist of some type of numerical measurement.?Examples?of Physical properties are:Color (vividness of visual appearance)Luster (a shine or glow)Hardness (rigid and resistant to pressure)Odor (distinctive smell)Luminescence (emitting light not caused by heat)Conductivity (transmission of heat or electricity or sound)Solubility (ability to be dissolved)Malleability (capable of being shaped or bent)Ductility (easily pulled or stretched into a thin wire)Density (the measure of the relative "heaviness" of objects with a constant volume)Viscosity (resistance to flow - stickiness)Compressibility (made more compact)Freezing point (temperature below which a liquid turns into a solid)Boiling point (temperature at which the vapor pressure is large enough that bubbles form inside the body of the liquid)Melting point (temperature at which the solid melts to become a liquid)What are?Chemical Properties?Definition: Chemical properties are the characteristics that determine how it will?react?with other substances or change?from one substance to another. Chemical properties, or characteristics, which are exhibited as one substance and then chemically transformed into another. Chemical properties are only observable during a?chemical reaction. Reactions and changes to substances can be brought about by Burning, Rusting, Heating, Exploding and Tarnishing.Examples?of chemical properties are:Flammability (the ability to catch on fire)Toxicity (the ability to be poisonous)Radioactivity (giving off ionizing radiation)Heat of combustion (amount of heat released when the substance is completely burned)Reactivity with water (what happens when a substance reacts with water)Reactivity with acids (what happens when a substance reacts with an acid)Oxidation (the combination of a substance with oxygen)Corrosion (a corrosive substance that will destroy or irreversibly damage another surface) ................
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