7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - தகவல் செயலாக்கம் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - தகவல் செயலாக்கம் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - வடிவியல் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set C
Published on: 13/05/2022
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Download Tamil Nadu 7th Standard Science question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
Questions + Answers key
Take MCQ Science Test1.
How the iron blade is fixed into a wooden handle in tools used to dig the soil?
2.
Explain the following statement: Digestion is a chemical change.
3.
Boiling of water is a physical change; but boiling of egg is a chemical change. Why?
4.
A very hot glass on putting in cold water cracks. What does this change indicate?
5.
Peeled and unpeeled banana does not look the same. Does that mean peeling banana is a chemical change?
1.
Iron blade is heated so that it expands and fixes on the wooden handle then it cooled. so that it contracts and firmly attaches to the handle
2.
Digestion of a food is considered as a chemical change as various chemical reactions take place while digestion of food. More over as chemical changes are irreversible change. The food items changed into various nutrients like carbohydrate, fat and protein. So new substance are formed by evolution or obsorption of heat. So it is a chemical change.
3.
(i) Boiling of water is a physical change because it is a reversible action. No new substance is formed.
(ii) Boiling of egg is a chemical change because it is a irreversible action and new substance are formed.
4.
Suddenly variation of temperature it shrinks so it will be cracks. so heat is obsorbed suddenly heat liberated it indicates a exothermic reaction.
5.
(i) Yes, it is a chemical change.
(ii) Banana fruits contain an enzyme cailed polyphenol oxidase which cause chemical reaction when exposed to oxygen. Now the peeling banana colour is changed. So it is a chemical change.
7th Standard Syllabus & Materials
7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set B
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - இயற்கணிதம் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - அளவைகள் Important Questions And Answers Study Material - QB365 Set C
NEW7th Standard
Tamilnadu 7th Standard Maths T2 - அளவைகள் Important Questions And Answers Study Material - QB365 Set B
Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
