CBSE ADDA

Plants Kingdom           Question: 1. Why do we classify organisms?   Answer:- we classify organisms to understand characteristics of life form on the earth. Question: 2. Give three examples of the range of variations that you see in life forms around you. ·       Answer:- Three examples of the range of variations in life forms: ·          Bacteria is microscopic where as Red wood tree is giant ·          pine trees live for years where as mosquito for few days ·          Variety of flower having different colors Question: 3. which do you think is a more basic characteristic for classifying organisms? (a) The place where they live.   (b) The kind of cells they are made of. Why? Answer: The kind of cells an organism is made of is more basic characteri...

Clich here to get solution of 9th psa 2015  Students who appeared for CBSE PSA 2015 can check the Answer Key for PSA Exam here for their question paper set. We will upload the answer keys of all question papers for both class 9 and class 11here. The answers for 9 th ninth PSA SET D-3 1 3 3 4 4 4 4 4 4 2 4 2 4 1 2 2 4 2 3 3 3 4 1 2 2 4 2 1 3 3 2 4 4 2 1 3 2 2 1 4 4 3 2 1 4 2 3 4 3 4 1 1 3 4 1 3 1 3 4 ...

Section: A Q.1 A positively charged ion is called (A) atom (B) anion C) cation (D) neutral ion Q.2 The instrument needed to measure the current flowing through a circuit is ? (A) voltmeter B) voltameter (C) galvanometer (D) ammeter Q.3 The process in which any electrolyte gets decomposed when electricity is passed through it, is called (A) electrolysis (B) decomposition (C) dissociation (D) splitting Q.4 The process of depositing a thin layer of any superior metal over an object of a cheaper metal with the help of electricity is called (A) electrorefining (B) electrometallurgy (C) electroplating (D) electrowinning Q.5 Which of the following is the most essential for an electric circuit to work ? (A) A switch (B) An electric current (C) A swi...