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Guide research THEME MATERIALS ACTIVITY ? What we have to do Let us explore fabrics that are obtained from ?bre ? What do we need A cotton duster the one we use in kitchen or mop cloth used for oor moping a needle a pair of scissors ? How do we proceed Sp

THEME MATERIALS ACTIVITY ? What we have to do Let us explore fabrics that are obtained from ?bre ? What do we need A cotton duster the one we use in kitchen or mop cloth used for oor moping a needle a pair of scissors ? How do we proceed Spread the given piece of cloth on your table Cut the sides with the help of scissors to loosen the network of threads Fig Pull out the threads yarn from the cloth using a needle Fig Keep the thread on the table and hold it at one end with your hand and scratch it with your nail and observe what happens Fig and Fig Figure Cutting a piece of cloth Chapters indd Figure Pulling a thread from cloth Figure Splitting the yarn into thin strands Figure Yarn splits up into thin strands - - Laboratory Manual ? What do we observe It is observed that a thread yarn from the cloth splits into many strands ?bres on scratching with nail ? What do we conclude ? Cloth is made of ? Yarn is made of several ? Strand of yarn is made of ? Let us answer What is the di ?erence between yarn and strand What di ?erence do you ?nd between strand and ?bre What is the ultimate constituent of cloth ? What more can we do ? Take some other types of clothes and try to ?nd out whether the yarn is made of single strand or many strands Note for the teacher ? Make sure that students note that thread yarn of the cloth is not made of several strands in each case Notes Chapters indd - - ACTIVITY Materials ? What we have to do Classify the given materials on the basis of properties such as hardness solubility in water oats in water and transparency ? What do we need Wax glass piece with blunt edges oil coated paper sugar green leaf piece of coal piece of wood a coin a piece of sponge a container water spoon glass rod a sheet of white paper ? How do we proceed Take the given materials one by one and observe the materials which are compressed on applying some pressure Record your observations in a Table Take a container like beaker glass bowl etc and ?ll it half with water Add any given material and see whether it oats or sinks Fig Now stir it with a spoon or glass rod and check if it is soluble or insoluble Repeat the same steps with other materials also Record your observations in the Table Take a strip of white paper and make a dark spot on it Fig Place the given materials one by one on the spot and observe its visibility whether you can see it clearly Fig not clearly Fig or not able to see it at all Fig Record your observations in the Table Figure Some objects aot in water while others sink in it