CBSE Class 1 Mathematics Syllabus

CBSE Class I Mathematics:

CBSE Class 1:

             CBSE Class 1 students have various subjects like Mathematics, Science, English, Computer and Hindi. Among this, let us check the details about the CBSE Mathematics below:

 

Chapters covered in CBSE Class I Mathematics:

                         Math is a very important subject to trigger the brain right from the childhood. Students get familiar with this subject right from their younger age through counting and number systems. Keeping this in mind, CBSE board has developed suitable Mathematics syllabus for every Classes. Through CBSE Class I Math, students get adapted to a sequential system of learning math which can make them to learn it comfortable. With few small examples and simple exercises, CBSE trains even the small kid to brilliantly solve the mathematical questions.

Thus, let us check the chapters covered in the CBSE Class 1 Mathematics here:

  • Shapes and Spaces:

     Students are trained to find out various shapes and sizes. In addition to this, they are trained to know the special relations such as Top, bottom, under, above, near, far, before, etc.

Example:

               Shapes like Hexagon, square, pentagon, cube, oval and various other shapes are trained through real time objects.

Exercises for this chapter:

  1. Students have to collect different objects from the surroundings such as stones, pebbles, cones, pipes and name their shapes in their notes.
  2. They are taught to observe the effects caused due to rolling and sliding of the shaped objects.
  3. Sorts and finds out the 2D objects which are made out of card board.

 

  • Number system:

     Developing the knowledge in counting and numbering systems. They are taught to count from one to hundred at this stage.

Exercises for this chapter:

  1. Counts the number of toys, dolls which are in their surroundings.
  2. Recognizes and speaks numbers from 1 to 9.
  3. Forms number sequence from 10 to 20.
  4. Knows the difference between group of tens and ones in numbering system.
  5. Writes the numerals from 11 to 19. Also, spells the numerals.

 

  • Addition and Subtraction:

             Addition and Subtraction is rather an important part in mathematics. Students are taught to add and subtract using the real objects and pictures. Learns to add and subtract the numbers upto 20. Knows the importance of Zero in addition and subtraction.

      For example:

       5+5=10

       5-5=0

 

  • Telling time:
  1. Knows the importance of time. Learns to check the events occurring earlier and later.
  2. Introduction to time. Difference between morning, afternoon, day and night.
  3. Reading the clock.
  4. Understanding which activities takes longer time.
  5. Difference between analog and digital clocks.
  6. Sequencing student activities according to the time occurrence.

Examples:

  1. The time now is 8 o’ Clock.
  2. 1 minute is equal to 60 seconds.
  3. 60 minutes is one hour.

 

  • Days, weeks, months patterns:

               Students are taught the basic things in Days, months and week patterns.

Exercises:

  1. Students are taught that there are 12 months in a year, 4 weeks in a month and each week has 7 days.
  2. Learn the names of the months and days.
  3. Exercises given to identify the month and day.

               Example:

  1. The day after Sunday is Monday.
  2. Number of days in the month of January is 31.

 

  • Money:

           Students are trained to identify common currencies and notes. Learns the importance of currency and different values of Indian currencies. Adds and subtracts few sums of money.

Example:

  1. Father has a balance of 10 rupees after he purchased shampoo for Rs.10 from the total money Rs.20.

20-10=10

 

  • Measurement:
  1. Differentiates between near, far, thick, thin, longer, shorter, high and low.
  2. Exercises are given to find out the longer and shorter distance, higher and lower prices, thicker and thinner persons, etc.

                Example:

  1. Meera is shorter than Latha with pictures.
  2. Milk is costlier than egg with pictures and numbers.

 

  • Data handling:
  1. Counting letters in a name.
  2. Grouping names with the same number of letters
  3. Counting and recognizing shapes, etc.,

                   Example:

  1. Total number of letters in “welcome” is 7.
  2. Sample of 4 letter words are “Good”, “Best”, “Baby”, etc.,
  3. There are 3 squares and 2 ovals in this picture.

These are the topics which are covered for the Class 1 CBSE students.

 

CBSE Class 3 Mathematics Syllabus

CBSE Class 3 Mathematics:

              When compared to CBSE Class 3, CBSE Class 2 Mathematics covered various simple topics on Addition, subtraction, multiplication without carry, place value in numbering system, simple division, etc., But in CBSE Class 3, next level mathematics is taught to enhance and trigger the brain of the child. For this, they have included the portions just similar to that of Class 1 and Class 2 but in little higher level. Among all the subjects of CBSE Class 3 like Mathematics, Science, Hindi and English let us check out the syllabus of Mathematics below.

 

CBSE Class 3 syllabus:

             They cover similar syllabus just like that as Class 2 and Class 1.

  • Numbers:

           Children are taught to write the series of numbers up to 9999 in Class 3. Also, they are trained to pronounce and write the compact and expanded form of such numbers.

Topics covered:

  1. Compact and expanded forms of numerals
  2. Roman numerals
  3. Ascending and descending order of the numbers
  4. Rounding off
  5. Place value
  6. Equivalent numerical names

        Examples:

  1. Fill up the missing numerals:
  • 200 _ _ _ _ 205
  • 345_347_ _ 350
  • 34_ _ _ 38_ _ 41

        Answer:

  • 200 201 202 203 204 205
  • 345 346 347 348 349 350
  • 34 35 36 37 38 39 40 41
  1. Write the equivalent number names for the following:
  • 199 = One hundred and ninety nine
  • 214 = Two hundred and fourteen
  • 3450 = Three thousand four hundred and fifty
  1. Write the equivalent numerals for the number names
  • Three hundred and sixty six = 366
  • Four hundred and thirty five = 435
  • Two thousand six hundred and thirty five = 2635
  1. Roman numeral VI ______ than VIII
  • =

               Answer: <

  1. How would you write ten in roman letter?
  • X
  • XII
  • V

                 Answer: X

 

  • Addition and Subtraction:

                 Addition and Subtraction are rather important chapters for a growing child which triggers his/her brain to solve the questions. In class 1 and class 2, addition and subtraction were little simpler with simple two digit and three digit additions and simple word problems. But in class 3, next level of addition such as four digit addition, subtraction with or without borrowing, addition and subtraction word problems are covered.

Examples:

  1. Answer the following:
  • 8789 + 5674 = ?
  • 567 + 4563 = ?

    Answer:

  • 14463
  • 5130
  1. Find 6090 – ______ = 5590

    Answer:

  • 500

 

  • Multiplication and Division:

         Covers the topics such as counting using rows and columns, multiplication tables from 2 to 7, multiplying by 1, multiplying by 0, grid multiplication and word problems in multiplication. In division it covers, division by 10 and 100, division with two digit number, multiplication and division mixed problems, division word problems, etc.

Examples:

  1. 500 pencils are shared among 5 students of the classroom equally. How many pencils did each one get?

Answer: 100

  1. There are 20 bags of apples. Each bag contains 100 apples. Totally how many apples are there?

Answer: 2000

 

  • Fractions:

         Fractions are the important part of mathematics and it is very important to understand it clearly. Fraction comes as proper and improper fraction. The terms numerator and denominator are very important in the concepts of fraction.

Numerator = Number that is above the fraction line. Example: 2 in 2/3

Denominator= Number that is below the fraction line. Example: 3 in 2/3

Proper fraction has numerator smaller than the denominator whereas improper fraction has numerator larger than denominator. An improper fraction can be converted into a mixed fraction having a proper fraction and integral part. Fractions can be added, subtracted, divided and also multiplied.

Examples:

  1. Find out the fraction of vowels in the word “GREAT”?

Answer:

2/5

  1. There are totally 5 glasses of water in the table. Geetha drank 3 glasses of water. What is the fraction of water did geetha drink?

Answer:

3/5

 

  • Rupees and paise:

     Students are taught how to spend their own money and how to add, subtract, multiply and divide with their own money.

Examples:

  1. 6 Rupees is equal to _______ paise

Answer: 360 Paise

  1. 35 is equal to ______ paise

Answer: 575 Paise

  1. 675 paise is equal to _____ rupees

Answer: Rs.11.25

 

  • Time and Date:

         Topics covered such as Time taken to finish a task, puzzles for young minds, understanding the calendar, reading the clock and differentiate between AM and PM, etc.

Examples:

  1. How many rounds does an hour hand complete in a day?

Answer: 2 rounds

  1. What is the exact time taken by the minute hand to move from one number to the next number?

Answer: 5 minutes

 

  • Shapes and their properties:

               Topics covered such as different shapes and sizes, properties of shapes, edges and corners, vertices and surface, review of shapes and sizes, etc.,

Examples:

  1. Which of the following options are measured in cms and m?
  • Length of the banana
  • Height of your father
  • Distance from home to office

         Answers:

  • In cms
  • In cms
  • In meters
  1. Mention the length of the objects surrounding you:
  • Pen
  • Sharperner
  • Spoon

             Answers:

  • 10 cms
  • 3 cms
  • 8-9 cms

 

  • Measurement of length, mass and capacity:

              The basic things like standard unit of length, standard unit of mass, standard unit of capacity, converting meter to centi-meter, milli-meter and kilometer, etc are taught in this section. Students are given the basic understanding that the length of the pencil is measured in centi-meters whereas the distance between two places are measured in meters. Similarly, they are also taught how to measure the mass (in terms of kgs) and capacity (in terms of ml and l).

Examples:

  1. 18 L = _____ ml

Answer: 18000

  1. My mother is making noodles for dinner. Each noodles packet weighs 500g. How many grams of noodles will be there in 6 packets.

Answer: 3000 grams

  1. Add 85m 25cm and 56 m 44 cm and write the answer:

Answer: 141m 69 cm

 

  • Smart charts:

             Pictorial representation of collection of data is called as charts. Topics which are covered are drawing simple charts with two or multiple columns, reviewing simple graphs, pictograph, etc.

Examples:

  1. Answer the questions according to the datas given below:
  • Painting : 10

Dancing: 8

Music: 5

Craft: 15

Cycling: 13

Gardening: 14

Stamp collection: 10

Reading: 9

     Questions:

  1. Which is the most popular hobby?

Answer: Craft

  1. Which is the least popular hobby?

Answer: Music

  1. What is the difference between the number of students interested in Stamp collection and Dancing?

Answer: 2

 

  • Play with patterns:

             This section covers topics such as understanding pattern around us, detecting the number patterns, arranging in alphabetical order, skip counting, growing patterns and even odd patterns.

Examples:

  1. Arrange the following names in alphabetical order:
  • Abinay
  • Xavier
  • Harish

               Answer:

  • Abinay
  • Harish
  • Xavier
  1. Complete the following numerical patterns:
  • 98,198,298,398,_

                 Answer:

  • 98,198,298,398,498

Thus, these are the topics covered in CBSE Class 3 Mathematics.

CBSE Class 2 Mathematics Syllabus

CBSE Class 2 Mathematics:

                     Just like CBSE Class 1 Subjects, Class 2 includes subjects such as Mathematics, English, Hindi and others. In Class 1, students are taught some basic topics in all the above subjects whereas in Class 2, subjects are going to get little deeper than Class 1.

                    Among all the subjects like Mathematics, English, Science and Hindi let’s get a deeper look into “Mathematics” and its syllabus for CBSE Class 2 students.

 

Syllabus for CBSE Class 2 Mathematics:

  • Numbers:

                Understanding the sequence of numbers, names of the number and grouping the numbers. The topics which are covered under the “Number system” are:

  • Introduction to counting the numbers in groups
  • Looking and guessing the numbers
  • Formation of things in group
  • Concept of Greater than(>) and Lesser than(<) symbols
  • Order of numbers
  • Names of the numbers (up to 9999)
  • Formation of ascending/descending order of numbers.
  • Learning about odd and even numbers
  • Comparing numbers (After/before/in between)

 

      Examples:

  1. Write the below numbers in words:
  • 33
  • 406
  • 345

     Answers:

  • Thirty Three
  • Four hundred and Six
  • Three hundred forty five
  1. Circle the numbers that are more than 234:
  • 235
  • 233
  • 222

     Answers:

  • 235
  1. Arrange the following numbers in ascending and descending order:
  • 45,78,13,9,5,64,79,109 (in ascending order)
  • 67,87,34,12,09,7,1,45 (In descending order)

     Answers:

  • 5,9,13,45,64,78,79,109
  • 87,67,45,34,12,09,7,1
  1. Write the numerals for the following number names:
  • Forty six
  • Sixty seven
  • Thirty two

    Answers:

  • 44
  • 67
  • 32
  1. Fill in the blanks:
  • 50 + 20 + 6= _ + 20 + 50
  • 12 + 13 + 4 = 13 + _ + 12
  • 7 + 5 + 7 = 7 + 7 + _

    Answers:

  • 50 + 20 +6= 6 +20 +50
  • 12 + 13 + 4= 13 + 4 +12
  • 7 + 5 +7= 7 + 7 + 5

 

  • Place value:

                Students have to know the importance of the place values in the numbering system and they should be able to identify whether the place value is “Ones”, “Tens” or “Hundreds”.

For example, in a two digit number, the position of each digit gives its values. In 25, it has 2 tens and 5 ones.

Examples:

  1. Write the place value for the following numbers:
  • 235
  • 789
  • 603

            Answers:

  • 2 is in hundreds place
  • 8 is in tens place
  • 3 is in ones place
  1. Compete the following:
  • 5 tens + 2 ones
  • 4 tens + 4 ones
  • 5 hundreds + 3 tens + 2 ones

            Answers:

  • 52
  • 44
  • 532

 

  • Skip counting:

       Skip counting means finding the next number in the series. For example, in the series of 10, 20, 30…the next number which comes is “40” and “50” respectively.

Examples:

  1. Fill up the blanks with skip counting:
  • 5,15,20…..50?

                 Answers:

  • 5, 15, 20, 25, 30,35,40,45, 50.
  1. Fill up the following series:
  • 2, 12, 22,…?

                       Answers:

  • 2, 12,22, 32,42,52

 

  • Addition and Subtraction:

                 In CBSE Class 1, students would have learnt only basics in addition and subtraction. But in Class 2, students are taught to solve word problems in addition and subtraction. In Class 2, students learn to add or subtract a number using zero, observes commutative property of addition through patterns, solves problems described through pictures and verbal description. Other topics covered are Addition with carry over, adding 4 digit numbers, adding two digit numbers, addition word problems, etc.,

Examples:

  1. 10 -10=0
  2. 9-2=7
  3. 435+100=535

 

  • Multiplication and Division:

         The topics which are covered here are multiplication without carry, multiplication tables of 2,3,4,5,6, etc., skip counting to multiply and simple division.

Examples:

  1. Fill up the following:
  • 5 * 10 = _
  • 4 * 3= _
  • 3 * 9 =_

     Answers:

  • 50
  • 12
  • 27
  1. 450 * 10 = 4510
  2. 16 % 4 =4
  3. 25 % 5=5

 

  • Money:

           Learns to identify important currencies, coins, etc., Adds and subtracts money through mental arithmetic.

Examples:

  1. Write the amount in words:
  • 50 = Seventy six rupee and 50 paisa
  1. Write the amount in figures:

Five hundred and sixty six rupees and 10 paisa = Rs.566.10

 

  • Time and date, calendar:

            Students are taught basic things about year, month, days. They should have a clear understanding that 12 months are in a year, 7 days form a week and 4 week for every month, etc.,

Examples:

  1. Differentiate the months and days below:
  • January
  • Monday
  • Tuesday

        Answer:

  • January is the name of the month
  • Monday is the name of the day
  • Tuesday is also the name of the day
  1. The longer hand of the clock is called as Minute hand.
  2. A leap year has 366 days.
  3. Which month comes before March? February
  4. Which is the first month of the year? January

 

  • Basic shapes, symmetry in everyday life:

  Learns to identify 3-d shapes of rectangle, triangle, cuboid, cylinder, cone and sphere.

Examples:

  1. A closed figure with four equal sides is said to be a Cube
  2. A bangle is in the shape of

 

  • Lines:

           Learns to identify the differences of vertical, horizontal and straight lines.

Examples:

  1. Please identify the number of vertical lines in the given picture.

 

  • Word problems based on Addition and Subtraction:

Along with solving small problems in addition and subtraction, students are trained to solve word problems in addition and subtraction areas.

Examples:

  1. Latha has 25 apple sweets and 15 orange sweets. Totally how many sweets does she have?

        Answer:  40

  1. Seetha has 20 stamps out which she gave 5 stamps to rama. Now, how many stamps does seetha have?

          Answer:  15

 

  • Measurement of Mass, Length, capacity:

     Learns to measure the lengths in units, measure the mass in terms of internal volume, and compares one or more objects with their weights.

Measurement of Mass:

          Using the formulas of simple balance calculates the weight of given objects. Also differentiates between heavier and lighter objects.

Measurement of Length:

          Using simple units to measure length, calculates an objects Length.

Measurement of Weights:

         Calculates volume of the containers using simple formulas of calculating volume.

Examples:

  1. Length of the boundary of the wall is measured in
  • m
  • Kg
  • l

           Answers:  M (Meter)

  1. A teaspoon of medicine is measured in
  • l
  • ml
  • cm

             Answer:   ml (milli litre)

  1. Your weight is measured in
  • g
  • kg
  • l

            Answer:  Kg (Kilo gram)

Thus, above are the syllabus covered under the CBSE Class 2 Mathematics.

 

 

CBSE Class 10 Science Syllabus

CBSE Class 10 Science:

             CBSE Class 10 Science syllabus is divided into two terms such as Term 1 and Term 2. Term 1 includes the following topics such as:

Term 1:

  • Chemical substances- Nature and behavior
  • World of living
  • Effects of current
  • Natural resources

Term 2 includes topics such as:

  • Chemical substances-Nature and Behavior (Continued)
  • World of Living (Continued)
  • Natural Phenomena
  • Natural Resources (Continued)

The above syllabus in detail are:

 

  • Chemical Substances- Nature and Behavior:

             In first Term the above chapter covers the topics such as Chemical reactions, acids, bases and salts, metals and non-metals. In the second Term it covers the chapter such as Chemical substances-Nature and Behavior, Periodic classification of elements.

Chemical reactions:

               This chapter explains about the chemical reactions that occur naturally on any given substance. For example, when milk left at the room temperature during summers will turn it from its original nature, why grapes gets fermented and how foods are digested in our body. Thus, a chemical reaction can be defined as a process of conversion or transformation of a set of substances into another form. It is represented by a chemical equation which represents reactants, products and their physical states symbolically.

Any chemical equation is always in a balanced state so that the number of atoms of each type of reactant remains the same on the reactant and product sides of the equation.

The major topics which are covered under this chapter are

  • Chemical equations and balanced chemical equations
  • Types of chemical reactions
  • Effects of oxidation in everyday life
  • Understanding and writing chemical reactions

       Acids, Bases and Salts:

                             This is a chapter which indicates the different taste that occurs in the food substances

         because of the acids and bases.

       Some of the examples of acids and bases reactions are

  1. Acids when reacts with a metal, hydrogen gas is evolved and a corresponding salt is formed.
  2. When an acid reacts with the metal carbonate or metal hydrogen carbonate, it gives the corresponding salts, carbon dioxide and water.

A scale called as pH scale is used for testing the strength of the acid or alkali. This chapter also covers various topics on preparation and properties of beaching powder, washing soda, plaster of paris, common salt and baking soda.

Metals and non-metals:

                     Metals are ductile, malleable and are good conductors of heat and electricity. Except the metal Mercury, almost all metals are solids at the room temperature. The extraction of metals from their ores and then refining them for use if known as metallurgy.

                    Non-metals have the properties just opposite to that of the metals. They are neither ductile nor malleable. They are bad conductors of heat and electricity except for graphite which conducts electricity.

Periodic classification of elements:

           Elements can be classified on the basis of the similarities in the properties. Elements can be arranged in an increasing order of atomic masses and according to their chemical properties. Thus, for reference a periodic table is formed mentioning every possible elements.

        Examples:

  1. Give an example of the metal which
  • Is a liquid at the room temperature
  • Is a best conductor of heat
  • Is a poor conductor of heat
  • Can be easily cut with knife

           Answer: 

  • Mercury
  • Silver
  • Lead
  • Sodium
  1. Why curd and sour substances must not be kept in the brass and copper vessels?

Answer: Brass and copper vessel contains copper which reacts with the acids found in the curd or other sour substances. Thus, this reaction forms soluble salts which are poisonous in nature making curd unfit for the consumption.

  1. Why sodium is kept immersed in kerosene oil?

Answer:  Sodium reacting with oxygen catches up fire when kept in open place. Thus, sodium is always immersed in kerosene oil to avoid such accidents.

  1. Why should a magnesium ribbon be cleaned before burning in air?

Answer: To remove the protective layer of basic magnesium carbonate from the surface of magnesium ribbon.

  1. Write the balanced equation for the following:
  • Hydrogen + Chlorine ->Hydrogen Chloride    

               Answer: H2+ Cl2->2HC

 

  • World of Living:

             This is a chapter which is covered in both first Term and second Term. In first term the topics which are covered are Life processes, control and co-ordination in plants and animals. In second term, the topics which are covered include Reproduction, Heredity and Evolution.

Life process:

             Life processes that take place in both plants and animals are covered under this topic. The topic life process includes nutrition, respiration, transportation, excretion in plants and animals. Life process in animals include Digestive system which explains the role of digestive enzymes in the digestion of food. Respiratory system is divided into two types as Aerobic respiration and anaerobic respiration. Aerobic respiration occurs in the presence of oxygen and by-products carbon dioxide, water and energy whereas Anaerobic respiration occurs in the absence of the oxygen and by products are ethanol and carbon dioxide.

             Excretory system in animals is the taken place by the functions of nephron which is responsible for purification of blood and urine formation. Just like the life processes in animals, life process in plants is covered under this chapter. Topics such as Transportation of water and minerals, mechanism of Photosynthesis, Respiration during day and night, Excretion in plants, nutrition in plants and so on.

Control and coordination in animals and plants:

           When humans step out in the bright sunlight, they partly close their eyes due to the excessive brightness of sunlight. In addition to this, they may start sweating as the temperature rises. These are called as the coordinated responses to stimuli. This not only occurs in humans but also in plants and animals.

Reproduction:

       This chapter covers the reproduction process in both plants and animals. It covers many concepts like budding, fragmentation, spore formation and sexual reproduction in humans and plants.

Heredity and Evolution:

              This chapter deals with the relationship between our physical appearance and resemblance to our family members. Evolution can be defined as change in the characteristics of living organisms over generations.

Examples:

  1. Name the excretory unit of the kidney?

Answer: Nephron

  1. Explain the process of Photosynthesis in plants:

Answer: Photosynthesis is a process in which plants use sun light, chlorophyll, carbon dioxide and water to synthesize food.

  1. Why does a plant cool the atmosphere? What is that term called as?

Answer: Transpiration

 

  • Effects of Current:

                     This chapter covers the basic topics under “Electricity” such as Ohm’s law, Resistance, Resistivity, Parallel combination of resistors and applications in daily life, electric power, heating effects of the current and its everyday applications, magnetic effects of electric current, etc. The region around the magnet where its influence or attraction is felt is called as the magnetic field of the magnet.

Examples:

  1. Define the unit of the current?

Answer: SI unit of the electric current is Ampere

  1. List any one property of the magnetic lines of force?

Answer: No two magnetic field lines intersect each other

 

  • Natural Phenomena:

         This covers the topics such as reflection of the light by the curved surfaces, mirror formula, concave mirror, convex mirror, reflection and refraction, focal length, principal focus, laws of refraction, etc. Reflection means change in the path of the wave when the bounce-off a barrier. Refraction of the waves means change in the direction of waves when they pass from one medium to another.

Examples:

  1. The radius of the curvature of the spherical mirror is 20 cm. What is its focal length?

Answer: 10 cm

  1. Name the mirror which can give you an erect and enlarged image of an object?

Answer: Concave mirror

 

  • Natural Resources:

                 In First Term it covers the topic such as Sources of energy and in the second Term it covers the topics such as regional environment, our environment and management of natural resources.

       Sources of energy:

                 This chapter is based on the concept that “Energy can neither be created nor be destroyed but can be converted to one form to another”.

      Management of natural resources:

                 This covers the topics such as how to conserve and manage the natural resources such as Forest, wildlife, water and mineral. It explains about three R’s such as Reduce, Recycle and Reuse.

      Our environment:

                 It is a study of living things, non-living things, ecosystem, loss of energy in the environment and large number of environmental problems. An ecosystem is a study of interaction between living and non living organisms. Environmental problems arise due to non-biodegradable waste generated by the humans such as plastics, detergent, dyes which get settled into the soil and water bodies and harm our environment.

       Examples:

  1. What is a good fuel?

Answer: A good fuel is that which releases more heat during burning but do not cause any environmental problems.

  1. What are the qualities necessary for a good source of energy?

Answer:

  • It should be easily available
  • It should be easy to store and transport
  • In should not cause any environmental problems
  • It should be economical
  • It should have high calorific value
  1. In what way does a biodegradable substance effect the environment?

Answer: It gives foul smell, thus causing air pollution

  1. Examples for biodegradable and non biodegradable substances?

Answer:

Biodegradable: Vegetable waste, cotton, paper

Non-biodegradable: Plastic, glass and polythene

Thus, above are the topics which are covered under the syllabus of CBSE Class 10 Science.