What is Revolution?
What is Revolution?
Revolution:
A revolution is one complete trip around the
Sun.
The movement of the Earth around the Sun in a fixed path is called a revolution.
Earth to revolve around the sun is 365.24 days or one year.
What is a Salt?
What is a Salt? Salt : A salt is a chemical compound consisting of an ionic assembly of cations and anions. Substance produced by the reaction of an acid with a base. Salt , also called sodium chloride, mineral substance of great importance to human and animal health, as well as to industry. Table salt is called common salt. Chemical name of common salt is sodium chloride and its formula is NaCl. Methods to get common salt: 1) By digging from mines. 2) By pumping up the brine (salt solution) 3) By evaporating the sea water. Class Assessment 1. ----------------is added to-many foods to bring out the flavour. A. Salt B. Acid C. Base 2. --------------- can also help to preserve food. A. Salt B. Acid C. Base 3. Common salt formula is -------------. A. Na B. Cl C. NaCl 4. ...
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