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Textbook Questions and Answers 1. Fill in the blanks. Question a.When the beams from the headlights of a car fall on an object in the night, the shadows – called ………. and ………… . can be seen.Answer:umbra, penumbra Question b.During a lunar eclipse the shadow of the …………. falls on the ………. .Answer:earth, moon Question … Read more

1. Describe natural resources with reference to the following 3 types: Question a.Mineral resourcesAnswer:Mineral wealth has an important place among natural resources. The rocks on the earth are mainly made of minerals. These minerals can be obtained by mining. Minerals that contain a high proportion of metals are ores, (i) Minerals are formed from the … Read more

1. Fill appropriate terms in the blanks:(white cement, soap, detergent, wearing of bones, tooth decay, hard, soft, portiand, fatty acid) Question a.The substance that helps water to remove dirt from the surface of material is called …………… .Answer:soap Question b.Fluoride is used in toothpaste to prevent …………… .Answer:tooth decay Question c.Soap is a salt of … Read more

1. Who are my companions? Question a. Column ‘A’ Column B’ 1. Stainless steel a. Non-metal 2. Silver b. Compound 3. Bhajani mixture for milling c. Mixture 4. Salt d. Element 5. Coal e. Alloy 6. Hydrogen f. Metal Answer: Column ‘A’ Column B’ 1. Stainless steel e. Alloy 2. Silver f. Metal 3. Bhajani … Read more

Textbook Questions and Answers 1. Distinguish between the following. Question a.Physical change and Chemical changeAnswer: Physical changes Chemical changes 1. In a physical change material may change its 1. A change which after physical properties and shape, size, texture or state. composition also. 2. No new compound is formed. 2. New compound /substance is formed … Read more

Textbook Questions and Answers 1. Fill in the blanks with the right word from the brackets: Question a.The process of digestion starts from the ………….. (stomach, mouth).Answer:mouth Question b.Eyelids have …………… muscles. (voluntary, involuntary)Answer:involuntary Question c.……………. is not a function of muscular system. (production of blood cell, performing movement)Answer:Production of blood cells Question d.Muscles of … Read more

Textbook Questions and Answers 1. Answer the following questions. Question a.What is a cell?Answer:The cell is the fundamental, structural and functional unit of living organism. Question b.Name the different organelles in a cell.Answer:The nucleus, endoplasmic reticulum, Golgi bodies, lysosomes, mitochondria, vacuoles, plastids, chloroplasts are the different organelles in a cell. Question c.What are micro-organisms?Answer:The organisms … Read more

Textbook Questions and Answers 1. Find the odd man out: Question a.Famine, earthquake, cloudburst, railway accident.Answer:Railway accident. Question b.Drought, heavy rains/storm, tsunami.Answer:Drought. Question c.Lava, hot mud, ash, locusts.Answer:Locusts. Question d.Washing away of crops, attack of pests on crops, volcano, singeing of crops.Answer:Volcano. 2. What are the remedial measures for the following calamities? Question a.Famine:Answer:Following are … Read more

Chapter 9 Heat Textbook Questions and Answers Fill in the blanks: Question a.Maximum heat is absorbed by a ………….. coloured object.Answer:black Question b.……………. of heat does not require a medium.Answer:Radiation Question c.Conduction of heat takes place through a ……………. substance.Answer:solid Question d.The shining surface in a thermos flask decreases the outgoing heat by ……………… .Answer:reflection … Read more

Textbook Questions and Answers 1. Choose the correct option and fill in the blanks.(always repulsion, always attraction, displacement of negative charge, displacement of positive charge, atom, molecule, steel, copper, plastic, inflated balloon, charged object, gold) Question a.There is ………….. between like charges.Answer:always repulsion Question b.…………. is responsible for generation of electric charge in an object.Answer:displacement … Read more