EducatorSharmin

Square Roots: The square of a number is that number multiplied by itself. The square of 12 is 144. The square root of a number is that number whose square is equal to the given number.                         The square root of 4 is 2.         0, 1, 4, and 9 are the squares of whole numbers, and they are called perfect squares. Q.1. Finding Square Root using Prime Factorisation Find   324 by using prime factorisation.                                  324   = 2 x 2 x 3 x 3 x 3 x 3                                            = ( 2 x 3 x 3 ) x ( 2 x 3 x 3)                                           ...

Cartesian Coordinates: Cartesian coordinates are a way to specify points in a plane or space using numerical values.      They are based on a system of perpendicular axes: 2D Cartesian Coordinates:  A point is represented as (x, y), where: x is the horizontal coordinate (left or right). y is the vertical coordinate (up or down). 3D Cartesian Coordinates:  A point is represented as (x, y, z), where: x is the horizontal coordinate. y is the depth or second horizontal coordinate. z is the vertical coordinate. Cartesian coordinates are used in geometry, physics, engineering, and computer graphics to plot points, lines, and shapes. Functions & Linear Graphs Learning Objectives: 1. State the coordinates of a point 2. Plot a point in a Cartesian plane 3. Draw the Graph of a linear function 4. Find the gradient of a straight line 5. State the y-intercept of a straight line 6. solve problems involving linear graphs in real-world contexts A function is a...

Weather and Climate:       Class- 4        Q.1. Write the names of the components of weather. Ans:  The components of weather are- i) sky conditions,  ii) temperature,  iii) humidity and  iv) wind. Q.2. What is the difference between fog and dew? Ans: Fog is a cloud that appears near the ground or touches the ground.  Dew is deposit of water drops that is formed on cold surfaces by condensation of water vapors in the air.   Q.3. What is the difference between weather and climate? Ans: Weather is the condition of sky and the atmosphere of a place for a short time. On the other hand, climate is the general condition of weather of a place for many years.   Q.4. Explain how clouds are formed.                Ans: Sea or river water evaporates due to the heat of the sun and it becomes                            wat...