Class6ScienceGuide

 Unit - 1 Measurement Summary 1.Mass, length, area, volume etc. are called physical quantities. 2. The measurement of the local system is not the same in all places. 3. The measure that is accepted all over the world is called authentic measure (Katabalambacham Galasht). 4. Following are the different types of measurements:   (a) F.P.S. : Foot-pound-second system   (b) C.G.S. : Centimeter gram second system   (c) M.K.S. : Meter Kilogram Second System 5. The distance between two points is called length. 6. The authentic unit of measuring length is meter. 7. The amount of matter in an object is called mass. 8. Physical mass is measured by scales. The unit of mass is kilogram. 9. The period between two events is called time. 10. The unit of time is second. Time is measured by a clock. Fill in the blank  (a) An object with more matter has more mass.  (b) The period between two events is called time.  (c) The mass of an object is measured by a balance. Cho...

 Unit - 2 Force and Motion Summary 1. The external force that pulls or drags is called force. 2. A force causes motion in a stationary object and stops an object in motion. 3. A force causes an object to accelerate. 4. A force changes the volume of an object. 5. A force changes the shape of an object. 6. Force is measured in Newton units. 7. When an object changes from one place to another, that object is in motion. 8. Movement of objects is of different types, viz   (a) Translational motion (b) Circular motion   (c) Oscillatory motion (d) Random motion 1. Fill in the blank 👉 (a) The motion of a falling piece of paper is called free fall. 👉 (b) The state in which the object is changing its position is called motion. 👉 (c) The reason why a stone thrown from above falls towards the ground is gravity. 👉 (d) To change the shape of an object, force is required. 2. Choose one correct answer from the given answers (a) What is the change in motion of any ...

  Unit - 3 Simple Machine Practice 1. Fill in the blank (a) It is better to cut cloth with scissors than to cut cloth by hand. (b) Penchis is a wedge. (c) Work can be done by using a stove. (d) It helps to make work easier in daily life. (e) When a simple device works, it changes the direction of force. 2. Choose one correct answer from the given answers (a) What is called a simple device? A device to facilitate work Devices to assist in speedy completion of work A device for completing work quickly and easily 👉 All of the above. (b) Which of the following is not a simple device? Bhayang  A wheelbarrow Ghirni 👉 Electric stick (d) In which case the lever exerts more force than the applied force? The distance of load is longer Distance of force is longer Distance between load and force is greater  👉  Load and force are closer 3. Write the answers to the following questions: (a) Which device is called a simple device? 👉 A simple device is a machine t...

Unit - 4  Heat Summary 1. The sun, biofuels, electricity and fossil fuels are the main sources of heat. 2. Solar heat warms the environment, heats water and produces electricity. 3. Wood, straw, straw, organic gas etc. are biofuels. 4. Coal, petrol, diesel, kerosene, etc. obtained from mines are called biofuels. E 5. Heat changes the state and volume of matter. 6. Dark and black colored clothes dissipate heat faster than pale and light colored clothes. 7. Heat is used to warm the body, cook food, dry clothes and other items, It is used in activities such as purifying water, producing goods in factories. Fill in the blanks: (a) The sun is the main source of heat. (b) Water is heated by solar oven. (c) Firewood, straw, straw etc. are called as renewable fuel. (d) Coal, petrol etc. are called non-renewable fuel. (e) Heat changes the state and temperature of matter. (f) When water is heated it becomes steam. (g) When the air is heated,...

 Unit - 5 Light Summary 1. An object that gives light is called a light source. Sun, electric lamp, candle lamp, etc   are sources of light. 2. An object that has its own light is called a luminous object. For example: sun, candle light, electricity Lamps, fire, firecrackers etc. are bright objects. 3. An object that does not have its own light is called an adipta. Unseen objects by the light of others Only visible. Such objects are not visible when they do not receive light from others. 4. Objects that allow light to pass through are called transparent. For example: air, glass etc. are transparent. 5. A material that does not allow light to pass through is called opaque. Like: stone, wood, chalk, soil Adi is opaque. 6. The material that has the appearance of the pakash is called semi-transparent. For example: two are broken. " 7. Light is transmitted from one place to another. Light transmission is always direct It just goes. 8. Pinhole cameras work on the principle that lig...

 Unit - 7 Magnet summary 1. The magnetic force in a magnet is called magnetism. 2. A magnet is a very useful object. 3. A magnet attracts magnetic objects. 4. The strength of the magnet is concentrated towards the side. 5. A magnet kept free to rotate is always “north and south” of the earth Sits down. 6. Like poles of two magnets repel each other and opposite poles attract it happens 7. The north and south poles of a magnet never separate. 8. Objects that are affected by magnets are called magnetic objects. Iron, nickel and cobalt are magnetic objects. 9. The point on the side of the magnet where the magnetic force is concentrated It is called Dhruva. 10. The area around the magnet up to which the magnet affects it is called the electromagnetic field. 3. Write answers to the following questions:   (a) What is magnetism?   (b) Name any four devices in which magnets are used.   (c) When a magnet is suspended in iron dust, more iron dust is drawn towards its si...

 Unit - 6 Sound summary 1. Sound originates from the constant vibration of objects. 2. Sharpness of sound is called sharpness. 3. A child's voice is louder than an adult's. 4. Bigger sounds have higher pitch. 5. The pitch of small sounds is low. 6. A sound with a higher pitch is transmitted to a greater distance. 7. Sound transmission is transmitted as waves. 8. Sound transmission requires a medium. 9. Sound cannot be transmitted without a medium (in zero space). 1. Fill in the blank (a) Sound originates from different objects that are vibrating. (b) Murli Bazau sound is generated. (c) Sound originating from metal is metallic. (d) A sound with more power has more loudness. (e) Sound is transmitted as longitudinal waves. (f) Sound transmission requires a medium. (g) The velocity of sound in air is 340 meters per second. Write answers to the following questions:   (a) When the ringing bell is touched with the hand, the sound stops, why?   (b) Write any four sources ...

 Unit - 9 Matter Summary 1. All objects around us are matter. 2. Matter has volume and mass. 3. The amount of matter in any object is called the mass of that object. 4. The space occupied by a substance is called the volume of that substance. 5. There are three states of matter at ordinary temperatures. They are solid, liquid and gas. E 6. Solids have their own shape and definite volume. 7. A liquid has a definite volume but not a definite shape. 8. A gas does not have a definite shape and volume. 9. If the temperature decreases, the state of matter changes. 10. A substance cannot be broken down to form a new substance, such a substance is called a substance. 11. A chemical reaction occurs between two or more elements in a certain ratio The substance of is called a compound. 12. Mixture of more than 2 or 4 years is called compound. 3. Write answers to the following questions:   (a) What is substance? Write any two properties of matter.   (b) What are the three sta...

 Unit - 8 Electricity summary 1. Electricity is a very useful power in daily life. 2. The main sources of electricity are cells, photo cells and generators. 3. Power sources, wires, devices, and switches connected so that current can flow continuously A closed path is called an electric circuit. 4. A material in which current flows easily is called a good conductor of electricity. 5. A material that does not conduct electricity is called a non-conductor of electricity. 6. A substance through which electricity partially flows is called a semiconductor. 3. Write answers to the following questions:   (a) What is photo cell?   (b) What is hydropower? A brief article on the method of producing hydroelectric power.   (c) Diagrams and various parts of a circuit of a wire, wire, lamp and switch. Name article.   (d) What is an electric circuit? What is its meaning, article.   (e) Why is the copper wire covered with plastic?   (f) What is called a non-co...

Unit - 11 Some Useful Chemical Summary 1. We use different types of chemicals in our daily life. 2. Chemicals have different properties and tastes. 3. Chemicals have various uses. 4. Baking soda is used in bakery industries. 5. Ghee provides strength to the body. 6. Chuk is used to make pickles. 7. Sugar is used to preserve foods. 8. Table salt is used in food for flavor. 3. Write answers to the following questions:   (a) List five chemicals used in daily life.   (b) Any two useful articles of baking soda.   (c) What is the taste of chook? Why is it used in food?   (d) What is the taste of table salt? Write any two uses of it. Answer 👉  (a) Here are five chemicals used in daily life: Water Soap Detergent Bleach Paint (b) Here are two useful articles of baking soda: Baking soda can be used to make baked goods rise. Baking soda can be used to clean surfaces. (c) Chuk is a type of salt that is used in Indian cuisine. It has a salty, sour, and slight...

 Unit - 10 Mixture summary 1. A mixture of two or more substances is called a mixture. 2. Inhomogeneous mixtures and homogeneous mixtures according to the state of the ingredients in the mixture There are two types. 3. A mixture in which the components are uniformly mixed is called a mixture. It is called equal mixture. 4. A mixture in which the components are uniformly mixed is called a mixture. It is called unequal mixture. 5. By removing unnecessary and harmful substances from the mixture, a useful and pure substance is obtained The mixture is separated. 6. Separation of mixtures A method of separating the components in a mixture from each other It is called (Kabhaubachbatsyal or Mashhatagachabha). 7. Inhibits the accumulation of water-insoluble substances on the surface of the vessel It is called (Kabhamashmbhalatbatsyal). 8. Separation of insoluble substances from liquids by means of fine-pored objects The method is called selection method. 9. A method of separating a ...

Unit - 13  Metal and Non-Metal summary 1. Division of metals into three categories, metals, non-metals and semi-metals based on their properties has been done 2. A metal that is hard in the solid state but can be made thin and long by beating It is said 3. Available in solid, liquid and gaseous state but cannot be made thin and long by beating Metal is called nonmetal. 4. Elements that have both metal and non-metal properties are called semi-metals. 5. Metals are hard, malleable and good conductors of heat and electricity. 3. Write answers to the following questions:   (a) Into how many categories are elements generally divided?   (b) List any four properties of metals.   (c) List any four properties of non-metals.   (d) any four utility articles of metal.   (e) Any two utility articles of copper metal. Answer 👉  (a) Elements are generally divided into three categories: metals, non-metals, and metalloids. (b) Four properties of metals are...

 Unit - 12 Air summary 1. Air is a mixture of different gases. This is not a compound. 2. Air contains nitrogen, oxygen, carbon dioxide, inert gases, water vapor and There are dust particles. 3. Wind is all around us. 4. Air has no color, smell and taste. But it weighs and takes up space. 5. Air flows from one place to another. 6. The oxygen in the air makes things burn. Object in an “oxygen free place”. can't burn 7. Green plants use carbon dioxide in the air to make food and sow manure. s This stage is known as RRP Kash Sram Shan. 3. Answer the following questions:   (a) What are the gases in the air? In what percentage are they found? s   (b) Write any four properties of air. (c) Any four utility articles of air.   (d) How can it be shown that air contains water vapor?   (e) Any two utility articles of nitrogen gas.   (f) Any two utility articles of carbon dioxide gas.   (g) How does it smell like rust? Answer 👉  (a) The gases in ...

 Unit - 14 Living Being summary 1. Some plant in land, some in water, some in summer, some in winter, some in warmth and some They grow in moist places. 2. In plants growing in water, the stems and leaves of the plants become slippery along with air bubbles. 3. The plant found in hot places has small and thick leaves. 4. Plants that grow in water have soft and slender stems, but those that grow on land The stem is hard and strong. 5. The lifespan of plants varies. They are one, two and multi year. 6. There are some differences between plants and animals. Those differences are growth, food, movement, consciousness and reproduction process etc. 7. Different types of animals are found in different places. 8. Depending on the location, there are differences in the physical structure and behavior of the animals. 9. Animals that live in water breathe through their lungs and skin while those that live on land The occupant breathes through the lungs, skin, air ducts, etc. 10. The b...