[Applause] Science five quarter one week one to week two milk base let's learn about properties of materials good day kids it's me teacherprell don't forget to subscribe like and share and hit the notification Bell for the latest video you can also follow my Facebook page teacher Pearl TV [Music] good day kids our lesson for today is about the properties of materials at the end of this lesson you are expected to [Music] discover and understand the properties of materials and their uses hello kids today you will learn about the properties of materials and their uses properties are distinctive characteristics that describe an object or materials like objects made of metals Plastics Woods and fabrics these properties of materials determine their uses and importance these properties may be observed directly or indirectly go to your kitchen Can You observe those materials found in your kitchen can you tell the uses of each materials each materials have their own characteristics which tell about their properties like texture color and hardness these properties are called physical properties [Music] let's observe teapot plate cup and saucer what characteristics do they share in common correct they are made of ceramics each property shows that it is hard rigid waterproof and resistant to heat these properties make them a good material for holding hot liquids there are also some plates cup and saucer that are made from Plastics Plastics are also durable but once it is deformed the deformation remains they are also durable durability is the ability of the material to withstand where pressure or damage unlike plastic materials rubber bands are elastic when force is applied on it it returns to its original size and shape after the force is removed this property is elasticity rubber is durable elastic and can resist Heat this makes rubber an excellent material for making tires for land vehicles try to help your mother scrub the still sink using steel wool or wire sponge the sink and steel wool are made up of stainless steel they are important because the sink is used to hold water when you wash things they are also tough easy to clean and strong some materials like Fork spoon and knife are also made from stainless steel you may cook rice in an aluminum pot or in a rice cooker aluminum issues in making cookwares like cattle rice cooker casserole and frying pan because it is a good thermal conductor and has light weight these properties are important for everyday use in cooking Foods when choosing materials for specific use don't forget to consider their characteristics and properties your prior knowledge about the characteristics of solid liquid and gas will help you determine their properties and uses in your everyday life you can describe a metal Kettle by saying that it is strong and durable a metal is also malleable malleability means that a metal can be hammered and form into sheets which can be used for a variety of different purposes the performance of solid materials consider their response to external forces hardness is a measure on the amount of force that an object can withstand stop materials like block of wood will not break easily in contrast to materials that are brittled like eggshells Plastics are flexible durable and resilient that's why they are good materials for storage containers but they are extremely resistant that they persist for hundreds of years do you know that plastic water bottle can persist for 450 years and disposable diapers for 500 years some materials found at home like the flower cord of the rice cooker or extension wires are made from copper wires these materials are good conductor of electricity electrical conductivity is the ability of metals to conduct heat and electricity and now for more learnings about this lesson let's do learning test one using the given objects presented in the table write as many characteristics or properties as possible to describe each object you can choose the characteristics or properties Inside the Box the first object is a chopping board what characteristics do this object have [Music] correct the characteristic of a chopping board is hard durable and strong for the second object is a plastic plates what characteristic or properties do this object have correct the characteristic or properties of these objects are smooth water resistant and hard number three a glass what characteristics or properties do this glass have correct this glass is smooth hard clear and transparent number four rubber band what characteristics or properties do this object have very good the characteristics or properties of this object are elastic strong and water resistant and number five still knife what characteristics or properties do this knife have correct the characteristics or properties of this object are malleable magnetic and durable and now let's move to learning task 2 match the materials in column A with their uses in column B number one knife what is the use of this object choose your answer in column B correct the uses of this knife is letter G knife is for food preparation or Cutlery number two wood what is the use of this wood correct the use of wood is for making chairs and tables letter h number three cloth what is the use of this cloth correct the answer is letter I cloth is also used as blanket number four metal pot what is the use of this object correct the answer is letter B metal pot is for cooking Foods number five ceramic cup what is the use of this object very good the answer is letter F ceramic cup is used to hold hot liquids number six muriatic acid what is the use of this object very good the answer is letter e cleans the toilet bowl number seven powder detergent what is the use of this object [Music] correct the answer is letter D it removes dirt in soiled clothes number eight mirror what is the use of this object very good the answer is letter A it reflects the existing light number nine Bad soap what is the use of this object very good the answer is letter J use for personal hygiene and number 10 electrical wires what is the use of this object very good the answer is letter C it is used to conducts electricity learning test 3. read the properties of materials below Identify the property of materials described in each sentence number one the physical property of metals that defines their ability to be hammered pressed or rolled into thin sheets without breaking what property is this very good it is malleability number two ability of the materials to conduct electricity what is the answer very good the answer is electrical conductivity number three this refers to the ability of the material to withstand where pressure or damage what is this very good it is durability number four the physical property of a material associated with the ability to be hammered thin or stretched into wire without breaking what is this very good the answer is ductility and number five it is the measure of the resistance to localize plastic deformation induced by either mechanical indention what is this very good the answer is hardness and now let's move to learning task 4. classify the uses or importance of each materials listed Inside the Box answer may be stated in any order choose your answer inside the box for the First Column write the food or the food preparation the food or food preparation are sugar water vinegar rice grains and salt next column two what are those objects used for cleaning or hygiene those are soap water alcohol detergent powder and toothpaste next column used for cooking or Heating these are liquefied petroleum gas charcoal teapot chop Woods rice cooker and for the last column Gadget and appliances what are these objects these are radio electric fan rice cooker teapot and liquefied petroleum gas and for the last activity Learning test 5. read each question carefully write the letter of the best correct answer number one Hannah loves to drink milk tea these food drinks contain a lot of sugar which is true about milk tea for human health a useful be harmful C sugar in milk tea is harmful if taken in excess letter D sugar in milk tea is useful if taken in excess what is the correct answer [Music] very good the answer is letter C sugar in milk tea is harmful if taken in excess number two rings necklaces and watches are examples of jewelries which material is best to use in making jewelries a Ceramics B Metals C Plastics D wood what is your answer very good the correct answer is letter B metals number three plants have properties that make them practical source of foods which property make them good source of foods a resistance B mechanical C chemical D physical what is the correct answer very good the answer is letter C chemical number four jewelries are made from Metals which can be hammered Into Thin sheets without breaking they can also with sand wear pressure and damage which properties best describe jewelries first malleability second electrical conductivity third durability fourth elasticity choose from the letter a one and two B one two and four c one and three B one only what is the correct answer very good the correct answer is letter c one and three and number five metals are used at home for variety of purposes if the electrician will install electrical light in your kitchen which materials is or are practical to use one gold two silver three copper for aluminum or 5 stainless steel is it a one and two B three and four see three only B five only what is the correct answer very good the correct answer is letter c three only remember properties are distinctive characteristics that describe an object or material like metals Plastics woods and fabrics this properties of materials determine their uses and importance these properties may be observed directly or indirectly each materials have their own characteristics which tell about their properties like texture color and hardness these properties are called physical properties kids are your all answers correct wow good job [Music] kids I hope you learn a lot from this lesson until our next subject bye bye kids thanks for watching [Music]