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Air Book Back Questions & Answers, Exercises, Solutions, Tests, Quizzes, Videos and Podcasts for Class 6 | Unit 4 | Term 2 | Chemistry | Science | Samacheer Kalvi – English Medium

6th Standard Samacheer Kalvi English Medium New Book Back Questions & Answers: https://www.thelearning.app/samacheer-kalvi-english-medium/class-6/science/air-2/exercises

Podcasts: https://www.thelearning.app/samacheer-kalvi-english-medium/class-6/science/air-2/videos

Tests & Quizzes: https://www.thelearning.app/samacheer-kalvi-english-medium/class-6/science/air-2/tests

Flash Cards: https://www.thelearning.app/samacheer-kalvi-english-medium/class-6/science/air-2/flashcards

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00:00 Introduction
00:16 Choose the correct answer
03:12 Fill in the blanks
04:25 True or false
06:08 Match the following
06:53 Analogy

Questions answered in this video –

1. __________ is the percentage of nitrogen in air.

2. Gas exchange takes place in plants using ___________.

3. The constituent of air that supports combustion is __________.

4. Nitrogen is used in the food packaging industry because it _________.

5. _______ and ______ are the two gases, which when taken together, make up about 99 percentage of air.I.Nitrogen II. carbon-di-oxide III. Noble gases IV. Oxygen

6. __________ is the active component of air.

7. The gas given out during photosynthesis is _________.

8. __________ gas is given to the patients having breathing problems.

9. _______ can be seen moving in a beam of sunlight in a dark room

10. ________ gas turns lime water milky.

11. Inhaled air contains a large amount of carbon-di-oxide.

12. Planting trees help in decreasing global warming

13. The composition of air is always exactly the same.

14. Whales come up to the water surface to breathe in oxygen.

15. The balance of oxygen in atmosphere is maintained through photosynthesis in animals and respiration in plants.

16. Moving Air

17. Layer in which we live

18. Stratosphere

19. Oxygen

20. carbon-di-oxide

21. Photosynthesis : _____ :: Respiration : Oxygen

22. 78% of air : Does not support combustion :: _____ : Supports combustion

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