What is a Cell?









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What is a Salt?

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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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Grade 5 Science All Assessments & Revision of examination

  Grade 5 Science All Assessments & Revision of examination  1.    Landforms are measured by a -------- surveyor -----. 2.    A scientist who studies Earth's structure and history is called a (n)----- geologist -------. 3.    The scientific theory that states Earth's crust is made of moving plates is called –-- plate tectonics ------. 4.    –--- island chain ------- a line of islands. 5.    –(e)----- lava ------ magma that reaches Earth's surface. 6.    A species that is in danger of becoming extinct is a(n)---------endangered species---------. 7.    Establishment of the first living community to develop in an area that used to be lifeless is called----pioneer community-------. 8.    When a species dies out completely, the species is---------extinct-------. 9.    The establishment of a new community where a community had already existed is called-------se...
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