Parts Of A Computer: The computer is composed of two parts: 1) Hardware 2) Software 1) Hardware: All physical component…

Calcium: i) Role: a) It is essential constituent of bones and teeth. b) It is vital for metabolic process such as nerve…

Vitamin A i) Role: Vitamin A plays an important role in growth and body repair, keeps the skin smooth and essential for…

Saturn In 1610, Galileo became the first person to look at Saturn through telescope. • Distance from Sun 1427 million k…

Mars • Distance form sun 228 million kms. • Revolution period 687 days. • Rotation period 24 h, 37 min and 22 sec. • It…

The earth is the largest and the densest of the four terrestrial planets. It is the most wonderful planet of the solar …

Apart from the moon, Venus is the brightest object in the sky. Venus can be seen with naked eye in the morning or in th…

Mercury • Its distance from Sun is 58 million kms. • Its revolution period is 88 days. • Its rotation period is 58 days…

Solar System • The solar system is the family of the sun, planets revolving around it, the satellites of the planets an…

Antibodies: Protein synthesized in the blood in response to the entry of foreign substances or organisms into the body.…

Ultrasonics: The study of sound aves with high frequencies beyond the upper limit of human hearing or 20 thousand Hz. T…

Myopia: Myopia (short sightedness) is an eye disease in which the patient cannot see the distant objects clearly. This …

Telemeter: A telemeter is a device used to remotely measure a quantity. Telemeters are generally the physical devices u…

Periscope: A periscope is an instrument for observation from a concealed position. In its simplest form it consists of …

1. Radiation targets only the cancer cells. However, chemotherapy is administered through the blood and therefore, aff…

Cell & Battery Cell: A cell is a DC voltage source in which chemical energy is converted into electricity. Battery:…

Nuclear Fission Fission is the splitting of a large atom into two or more smaller ones. Fission reaction does not norm…

Star i) Stars are self-luminous heavenly bodies. ii) They do not revolve around the sun. iii) They are usually stationa…

Asteroid: i) The small rocky objects which are orbiting the sun between orbits of Mars and Jupiter are known as asteroi…

Lunar & Solar Eclipse Lunar Eclipse i) It occurs when the earth comes between moon and sun. ii) Moon goes through s…