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)…
The human ear can easily detect frequencies between 20 Hz and 20 kHz. Hence, sound waves with frequency ranging from…
The frictional force exerted by fluids is also called drag or fluid friction. To overcome or minimize air fluid friction,…
In Chapter 7, Force and Pressure, students will come across questions on applied force and changes in the object's shape.…
The period which comes between the beginning of adulthood and puberty is called adolescence. In this period, the body undergoes…
Reproduction is termed to be a biological process in which organisms give birth to their offspring.It helps in maintaining the…
The number and variety of various life forms, such as plants, animals and microorganisms, in an area are called Biodiversity.…