CLASS: IX :: Improvement in Food Resources
CLASS: IX NCERT (CBSE) Improvement in Food Resources SUMMARY The green revolution contributed to increased food-grain production,...
CLASS: IX :: Natural Resources
CLASS: IX NCERT (CBSE) Natural Resources SUMMARY The important natural resources available on Earth are land, water...
CLASS: IX :: Why do we fall ill
CLASS: IX NCERT (CBSE) Why do we fall ill SUMMARY Health is defined as a state of...
CLASS: IX :: Sound
CLASS: IX NCERT (CBSE) Sound SUMMARY Like heat and light, sound is also a form of energy...
CLASS: IX :: Work and Energy
CLASS: IX NCERT (CBSE) Work and Energy SUMMARY • The essential conditions to be satisfied for work to be done are: Some force must act on the object The point of application of force must move in the direction of force W = F x S • SI unit of work is joule • Energy is the capacity to do work • The two types of mechanical energy...
CLASS: IX :: Gravitation
CLASS: IX NCERT (CBSE) Gravitation SUMMARY Freely falling object: Is the object which moves towards the Earth due to force of gravity Acceleration due to gravity: It is the acceleration produced in an object due to force of gravity Acceleration due to gravity varies from place to place Acceleration due to gravity is zero at the centre of the Earth Acceleration...
CLASS: IX :: Force and Laws of Motion
CLASS: IX NCERT (CBSE) Force and Laws of Motion SUMMARY If an object does not change its position with respect to time and the surroundings, it is said to be at rest, else it is said to be in motion. Force is that which changes or tries to change the state of rest or of motion of an object by a...
CLASS: IX :: Motion
CLASS: IX NCERT (CBSE) Motion Summary • Motion: Whenever a body changes its position continuously with respect to the position of other bodies around it then it is said to be in motion • Rest: An object which does not change its position with respect to its surroundings is said to be at rest • Distance: It is the actual length of the path...
CLASS: IX :: Diversity in Living Organisms
CLASS: IX NCERT (CBSE) Diversity in Living Organisms SUMMARY Aristotle, the Greek philosopher, classified animals based on whether they live on land, in water or in the air. Classification of living organisms is based on characteristics and divided the animals into groups and sub-groups. Charles Darwin put forward the idea of evolution in 1859, in his book, The Origin of Species. ...
CLASS: IX :: Tissues
CLASS: IX NCERT (CBSE) Tissues SUMMARY 1) A group of cells, that are similar in structure and work together to achieve a particular function, forms a tissue. 2) Types of plant tissues include meristematic and permanent tissues. 3) Meristematic tissues are rapidly dividing tissues. 4) Apical meristem is present at the apical or growing tips of stems and roots. 5) Lateral meristem is present in the...
