Std: V th. Sub: Science: Ist Semester.

Size: px

Start display at page:

Download "Std: V th. Sub: Science: Ist Semester."

Ashley Morrison
5 years ago
Views:

1 Std: V th Sub: Science: Ist Semester. S.l.No Title 1) Matter. 2) Elements, compounds. 3) Air and Water. 4) Combustion. 5) Plants and Animals. 6) Natural Resources. 7) Transportation. 8) 1

2 1. Matter. I) Choose the most appropriate answer and put a tick mark against it. 1) Atomic theory was proposed by : a) Kanada b) John Dalton c) Lavosier d) Berzill 2) The Particle are held tightly in : a) Liquid b) Solid c) Plasma d) Gasses. 3) Liquid have a : a) Definite volume but not Definite shapes b) Definite volume c) Definite shapes And Definite volume d) Definite shapes 4) The quantity of matter is given object or substance is called: a) Buoyancy b) Pressure c) Density d) Mass Fill in the blanks with suitable words. 1) The low of conversion of matter is given by scientist Lavosier. 2) SI Unit of mass is Kilogram. 3) The SI unit of density is g/cm 3 or kg /m 3. 4) The element are classified into metal and non metal. I 1) What is matter? Ans: Matter is anything which occupies space and has weight. 2) State the properties of matter? Ans: The properties of matter are:- 1) Matter occupies space. 2) Matter has weight. 3) How can you prove that matter occupies space? Ans: Place a glass beaker completely filled with water on a plate. Immerse a stone tied to the thread slowly into the beaker. Some water in the beaker flows out and collects in the plate. This shows that matter occupies space. 4) Name the three forms of the matter? Ans: The three forms of matter are:- 1) Solid 2) Liquid 3) Gas. 5) How are the particles arranged in solids? Ans: Arrangement of particle in solid:-in the solids Particles are held together closely in compact manner. Solid have definite volume and shape. There is a force of attraction between the particles. 2

3 Arrangement of particles in liquids:- The particle is close together but they are not arranged in order. Liquid have definite volume but they do not have definite shape. 6) Gases have no definite shape and volume? Why? Ans: Gases have no definite shape and volume because the particle are arranged far away from each other. 7) What is sublimation? Ans: The change of state from solid to vapour or from vapour to solid without passing through the liquid state. This is called sublimation. 8) State the law of conservation of the matter? Ans: Law of conservation of matter:- The quantity of matter in this universe never varies regardless of what change it undergoes. 9) Define density and pressure? Ans: Density: It is the amount of mass contain in a unit volume. Pressure: It is the force exerted on a unit area. 10) Explain buoyancy? Ans: When an object is immersed in water it exerts a downward force on the water and the water in turn exerts an upward force on the objects. This upthrust is equal to the mass of the liquid displaced. It is this up thrust that keeps a body afloat this up thrust is called the force of buoyancy. The phenomenon is termed as buoyancy. 2. ELEMENTS, COMPOUNDS AND MIXTURE. I) Choose the most appropriate answer and put a tick mark against it. 1) Water is an example for : a) Elements b) Compounds c) Impure substance d) Mixture. 2) Air is a. a) Compound b) Element c) Mixture d) Pure substances. 1) Oxygen is an example for element. 2) Water contains hydrogen and oxygen in the ratio 2:1. I 1) What are elements? Ans: Elements are those substances which cannot be subdivided chemically or cannot be synthesized out of other elements Example: Iron, Gold, Mercury and Oxygen. 2) What are compounds? 3

4 Ans: Compounds are those substances which can be decomposed into constituent elements or can be synthesized out of constituent elements. Example: Water Sugar and Methane. 3) What are the mixtures? Give two examples? Ans: A mixture is an impure substance made up of two or more elements or compounds mixed physically in any proportion. Example: Air, Soil and Seawater. 4) Write the different between a compound and a mixture. Ans: Compound Mixture 1) A compound is formed by two 1) A mixture is formed by mixing more elements combining substances Physically. Chemically. 2) The compound generally will have 2) The constituents in a mixture can constituent s elements in a be in ratio. Definite ratio. 5) Classifying the following into elements, compounds and mixture? Ans: a) Bromine Elements. b) Soil Mixture. c) Water - Compound. d) Iron - Element. e) Air - Mixture. f) Helium - Element. 3. AIR AND WATER. g) Sugar - Compound. h) Lime Juice - Compound. i) Methane - Compound. j) Carbon - Element. I) Choose the most appropriate answer and put a tick mark against it. 1) The chief constituent of air is: a) Hydrogen b) Oxygen c) Nitrogen d) Carbon. 2) The largest source of the water on the Earth is : a) River b) Ocean c) Pond d) Well. 1) Air is a mixture of many gasses. 2) The two forms of well are Open and tube. I 1) Name the constituents of air? Ans: The constituents of air are Nitrogen, Oxygen, Carbon dioxide, water vapour dust particles and inert gases. 2) Write any two properties of air? Ans: The two particles of air are: 1) Air occupies space. 4

5 2) Air has weight. 3) Air has weight: Explain with an Experiment? Ans: Take two balloons of the same size and mark them as A and B and blow them to equal size. Tie these balloons to the end of a meter scale. Balance the scale. slowly allow the air to escape from balloon A. The scale is imbalanced when the air is released from balloon A. Another side of the scale goes down. Balloon B goes down Balloon A goes up. This shows air occupies space. 4) Mention the uses of the water? Ans: Water is used for many purposes like Drinking, Cooking, Bathing for Agriculture purpose and in industries. 5) Name the different source of water? Ans: The different sources of water are river, well, lakes, pond, springs, and rain water. 6) Which is the main source of underground water? Ans: Tube well and open well is the main source of underground water. 7) What is spring water? Ans: Water stored under the earth s crust comes out on pressure through an opening this called spring water. 8) What is universal solvent? Explain with an experiment to show that water is a universal Solvent Ans: Most of the substance will dissolve in the water. So, water is called universal solvent. Take some water in beaker. Add a spoonful of salt to the water and stir well. This salt mixed with water. So, Water is called universal solvent. 9) What is potable water? Ans: Water which is fit for drinking is called potable water. 10) Why is naturally available water not fit for drinking? Ans: Naturally available water is not fit for drinking because it contains many germs and micro organisms. 4. COMBUSTION. I) Choose the most appropriate answer and put a tic mark Against it. 1) Bursting of cracker is an example for. a) Slow combustion b) Rapid combustion c) Explosion d) Spontaneous combustion. 2) Charcoal is an example for : a) Solid fuel b) Liquid fuel c) Gas fuel d) all the above. 1) Fuel produces heat and light energy on burning. 2) Vapour from paint is an example for gaseous fuel. 3) Rusting of Iron is a type of slow combustion. I Match the following. 5

6 1) Explosion Bursting of crackers. 2) Rapid fire combustion Igniting a gas stove. 3) Spontaneous Burning of phosphorus. Combustion. 4) Slow combustion Respiration. IV) 1) Mention the three components of combustion triangle? Ans: There are three components of combustion. 1) Oxygen 2) Heat 3) Fuel. 2) When water is poured on a burning object, it gets extinguished why? Ans: When water is poured on a burning object, it gets extinguished because water cuts the oxygen supply. 3) What is combustion? Ans: Combustion is a chemical reaction that gives heat and light. 4) Explain the different types of combustion with suitable example? Ans: 1) Slow combustion : The combustion which takes place slowly is called slow combustion. Eg: Rusting Iron. 2) Rapid combustion: It is a form of combustion in which large amount of heat and Light energy are released at ones. Eg: Lighting of a candle. 3) Spontaneous combustion: In this type of combustion no external heat is given, Heat of the surrounding area is Sufficient to start combustion Eg: Burning white Phosphorous in air. 4) Explosion: In explosion combustion takes place very quickly librating enormous Amount of heat, light and sound energy, Eg: Bursting of crackers. 5) What is controlled combustion? Give on example. Ans: The process of controlling the rate of combustion by controlling the combustible substance is called controlled combustion. Eg: Kerosene stove. 6) What are the fuels? Give an example for each type of fuel. Ans: Fuel is a substance that produces heat and light energy on burning. Eg : Solid fuel Wood, liquid fuel Petrol, gaseous fuel L.P.G 7) Suggest some alternative means of conversing fuel in your daily life? Ans: 1) Switch off lights and fans when not in use. 2) Go by walk to near shop. 3) Use public vehicles. 4. LIVING ORGANISMS. I) choose the most appropriate answer and put a tic mark against it. 1) The discharge of waist products from the body is called:- 6

7 a) Respiration b) Excretion c) Nutrition d) Reproduction. 3) Sugarcane is an example for:- a) Biennial b) Triennial c) Perennial d) Annual. 1) All living organisms are made up of cells. 2) Livings being made of only one cell are called unicellular. 3) The period between birth or death of living being is called life span. 4) An increase in the size is called growth. 5) The process in which oxygen is taken in and carbon dioxide is given out is Respiration. I 1) What are the characteristics of living beings? Ans: The characteristics of living being are: a) Growth b) Movement c) Respiration d) Excretion e) Response to stimulus f) Reproduction g) Life span h) Cellular structure i) Nutrition 2) What is reproduction? Ans: Living being continues their progeny by producing young ones of their own kind. This process is called reproduction. 3) What is the nutrition? Ans: Nutrition is the process by which a living being assimilates food and uses it for growth. 4) How plants are are classified according to their life span? Ans: According to their life span plants are classified into following types: 1) Annuals: These are the plants which live for one year or one season. Eg: Wheat, Paddy and Mustard. 2) Biennials: These are the plants that live for two seasons Eg: carrot, sugar cane. 3) Perennials: These are the plants which live for many year and produce flower, fruits and Seeds throughout the year. Eg : Mango tree, Apple tree. 5) Living being need food why? Ans: Living being need food for their growth, survival and produce energy required for various activities. 5. PLANTS AND ANIMALS. I) Choose the most appropriate answer and put a tic mark against it. 1) The respiratory organs of the fish are gills. a) Lungs b) Gills c) Skin d) Buckle cavity. 2) The green Plants which prepare their own food are called autotrophs. 7

8 a) Autotrophs b) Heterotrophy c) Climbers d) Annuals. 1) Animal which depends upon either plants or animals for their food are called Heterotrophs. 2) Plants respire through small openings called stomata. I 1) What are the difference between the plants and animals? Ans: PLANTS ANIMALS 1) Plants do not move from one place to another. There movement is 1) Animals can move from one place to Another restricted. 2) Plants prepare their own food 2) Animals are depends on others for Food 3) Animals take oxygen and give out Carbon dioxide. 3) Plants take carbon dioxide and give out oxygen. 4) Plants reproduce by seeds. 4) Animal reproduce by giving birth to Young ones or by laying eggs. 2) How do plants show movements? Give two examples? Ans: Plants do not move from one place to another their movement is restricted. Eg: a) Bending of the leaves towards sunlight. b) Folding of leaves. 3) How does the growth of plants different from growth of animals? Ans: Growth in plants is more in part like root tip, shoot tip, or tip of braches. In animals, growth is not restricted to particular areas. 4) Mention the different methods by which plants and animals reproduce? Ans: Plants reproduce by layering, grafting, by seeds, by buds and by cutting. Animals reproduce by laying eggs or by giving birth to young ones. 6. NATURAL RESOURCES. I) Choose the most appropriate answer and put a tic mark against it. 1) Kerosene and diesel are obtained from Petroleum. a) Coal b) Petrol c) Petroleum d) Natural gas. 2) Which of the following causes least pollution Compressed Natural gas. a) Petrol b) compressed natural gas c) Diesel d) coal 1) The rocky and earthy layers of the earth s crust are called lithosphere. 2) Natural gas is found with Petroleum in oil. 3) The oil extracted from oil traps is called crude oil. 4) In thermal power station coal is used as fuel to produce electricity. 8

9 I 1) What are the natural sources? Ans: Air, Water, Soil, and fuels provided by the nature are called Natural sources. 2) Name the types of natural resource? Ans: Solar energy, wind energy, air, water, soil and forest are types of natural resource. 3) How is soil formed? Ans: Soil is formed by the disintegration of rocks. 4) Explain the uses of soil and forests? Ans: Soil:- 1) Soil is required for the growth of plants. 2) Soil is home for many animals and insects. Forest:- 1) Forest provide habitat for various plants and animals. 2) Forest provides useful material like wax, gum food and wood. 5) Why do we consider coal and petroleum as fossil fuels? Ans: We consider coal and petroleum ass fossil fuels because they are formed by the remains of dead plants and animals buried under the earth s crust over millions of year. 7. TRANSPORTATION. I) Choose the most appropriate answer and put a tic mark against it. 1) 80% of goods and 70% of the people are Transported by:- Railways. a) Airways b) Roadways c) Waterway d) Railways 2) Pipe line transportation is used to transport goods like: Liquid and gases. a) Solids b) Liquid c) Gases d) Liquid and gases. 3) The cheapest means of transportation is waterways. b) Roadways b) Airways c) Waterways d) Railways. 1) There are 12 major ports in India. 2) The fastest manes of transportation is airways. 3) Ports allow the ships to stay in their docks. 4) There are 16 international airports in India. I Match the following. 1) Aero plane = Air 2) Boat = Water (Sea) 3) Bus = Road 4) Train = Rail IV) 1) What is the transportation? Ans: Carrying people and goods (things) from one place to another is called transportation. 9

10 2) Mention the means of transportation? Ans: The different menace of transport are:- Land, water and air. 3) How do you classify the land rote? Ans: Land route can be classified into roadways, railways and pipeline. 4) What fuels are used in the following vehicles? Ans: 1) Bus = Diesel. 2) Train = Diesel, Coal 3) Ship = Coal and Bunker oil. 4) Helicopter = Gasoline, Avgas 5) Which is the most economical vehicle to go for short distance? Ans: Bicycle is the most economical vehicle to go for short distance. 10

Grade -6(CHEMISTRY) Worksheet. Ans: Any source of water that flows or is stored on the surface of the earth known as surface of water.

Grade -6(CHEMISTRY) Worksheet. Ans: Any source of water that flows or is stored on the surface of the earth known as surface of water. NAME: Grade -6(CHEMISTRY) Worksheet Roll No: Lesson-7 Water Q.1 What is surface water? Ans: Any source of water that flows or is stored on the surface of the earth known as surface of water. Q.2 What is