There are several nutrients essential for crops. Of these, some are required in large quantities and are known as macro-nutrients…
Sound is produced due to the vibration of different objects. Sound travels as a longitudinal wave through a material medium.…
What you have learnt Work done on an object is defined as the magnitude of the force multiplied by the…
The law of gravitation states that the force of attraction between any two objects is proportional to the product of…
First law of motion: An object continues to be in a state of rest or of uniform motion along a…
The motion of an object could be uniform or non-uniform depending on whether its velocity is constant or changing. The…
Tissues is a group of cells similar in structure and function. Plant tissues are of two main types – meristematic…
What you have learnt The fundamental organisational unit of life is the cell. Cells are enclosed by a plasma membrane…
What you have learnt Credit for the discovery of electron and proton goes to J.J. Thomson and E.Goldstein, respectively. J.J.…
What you have learnt During a chemical reaction, the sum of the masses of the reactants and products remains unchanged.…
What we have learnt A mixture contains more than one substance (element and/or compound) mixed in any proportion. Mixtures can…
Matter is an important concept in Science, and it forms the basis for topics that are taught in later classes.…
Coal is made up of the remains of dead plants and animals buried in the ground, exposed to high temperatures…
The principle, when the light rays fall on a smooth surface, the angle of reflection is equal to the angle…
CBSE Class 8 Science Chapter 11 Some Natural Phenomena gives you knowledge of natural phenomena like lightning, earthquakes, etc. They…
Exercise Questions 1. Fill in the blanks. (a) Most liquids that conduct electricity are solutions of ______________ and ______________. (b)…