7th Standard Syllabus & Materials
7th Standard
TN 7th Tamil பருவம் -1 இயல் 1 - அமுதத்தமிழ் - ஒன்றல்ல இரண்டல்ல Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th Tamil பருவம் -1 இயல் 1 - அமுதத்தமிழ் - எங்கள் தமிழ் Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th English T1 - Poem - Your Space Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th English T1 - Prose - A Prayer to the Teacher Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th English T1 - Poem - The Listeners Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th English T1 - Prose - The Wind on Haunted Hill Important Questions And Answers Study Material - QB365 Set A
Published on: 16/06/2021
QB365 provides detailed and simple solution for every Book back Questions in class 7 Science Subject. It
will helps to get more idea about question pattern in every book back questions with solution.
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.
What is atomicity of elements?
2.
What are compounds? Give two examples.
3.
What are elements? What are they made of? Give two examples.
4.
What changes take place in the movement and arrangement of particles during heating process?
5.
List out the metals, non-metals and metalloids which you use in your house, schools. Compare their properties.
1.
The total number of atoms present in one molecule of an element, Compound or a substance is called atomicity
2.
A compound is a chemical substance formed by the combination of two or more elements in definite proportions.
Example:
H2O:
\(2 \mathrm{H}_{2}+\mathrm{O}_{2} \rightarrow 2 \mathrm{H}_{2} \mathrm{O}\)
(2 : 1)
NaCI:
\(2 \mathrm{Na}+\mathrm{Cl}_{2} \rightarrow 2 \mathrm{NaCl}\)
(2 : 1)
3.
(i) Elements are the simplest forms of pure substances.
(ii) Elements made of atoms
(iii) Example: Hydrogen, Oxygen
4.
When solid is heated, the particles gain energy and vibrate vigorously. The particles move slightly further apart from one another.
Hence, the volume increases due to the greater distance between the particles. But the size of the particles remains the same.
5.
| Properties | metals | Non-metals | metalloids | |
| 1. | Physical nature | Solids, a few liquids at room temperature. | Majority of gases. | Solids. |
| 2. | Appearance | Hard and lustrous. | Soft and non-lustrous. | Lustrous. |
| 3. | Conductivity | Good Conductors of heat and electricity. | Bad Conductors of heat and electricity. | Semiconductors. |
| 4. | Alloy formation | They can form. | They cannot form. | They can form. |
7th Standard Syllabus & Materials
7th Standard
TN 7th English T1 - Supplementary - On Monday Morning Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th English T1 - Prose - Eidgah Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th Social Science T1 - ECO - Production Important Questions And Answers Study Material - QB365 Set A
NEW7th Standard
TN 7th Social Science T1 - GEO - Interior of the Earth Important Questions And Answers Study Material - QB365 Set A
Tamilnadu Stateboard 7th Standard Subjects
Tamilnadu Stateboard Standards
