All animals require food for obtaining energy, growth, repair of damaged parts and functioning of the body. The process of taking food by an animal and its utilisation in the body is called animal nutrition. Plants can prepare their own
Read MoreAll living organisms require food. The food gives energy to the organisms for growth and maintenance of their body functions. Carbohydrates, proteins, fats, vitamins and minerals are the components of food. These components of food are necessary for our body
Read MoreRevision Notes on Visualising Solid Shapes Plane Figures (2-Dimensional Shape) The figures which we can draw on a flat surface are called Plane Figures. They have two dimensions i.e. length and breadth, hence these are called 2 Dimensional Shapes. Solid Figures (3-Dimensional Shape)
Read MoreRevision Notes on Symmetry Symmetry If two or more parts of a figure are identical after folding or flipping then it is said to be symmetry. To be symmetrical the two halves of a shape must be of same shape and size.
Read MoreRevision Notes on Exponents and Powers Introduction to Exponents and Powers When the numbers given are very large like 54,32,00,00,000 then it is not easy to read them so we write them in the form of exponents. Exponents make these numbers
Read MoreAn Algebraic Expression is the combination of constant and variables. We use the operations like addition, subtraction etc to form an algebraic expression. Variable A variable does not have a fixed value .it can be varied. It is represented by
Read MorePerimeter It refers to the length of the outline of the enclosed figure. Area It refers to the surface of the enclosed figure. Area and Perimeter of Square Square is a quadrilateral, with four equal sides. Area = Side ×
Read MoreLine segment A line segment is a part of a line with two endpoints. A line perpendicular to a line segment Any line which is perpendicular to a line segment makes an angle of 90°. Construction of a line parallel
Read MoreRational Numbers are the numbers that can be expressed in the form p/q where p and q are integers (q ≠ 0). It includes all natural, whole numbers, fractions and integers. Equivalent Rational Numbers By multiplying or dividing the numerator
Read MoreThe ratio is used to compare two quantities. These quantities must have the same units. The ratio is represented by “:”, which is read as “to”. We can write it in the form of “fraction”. Example Write the ratio of the height of Sam to
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