HEAT-POST4 (HOTS INCLUDED)


HEAT BLOG 4

   CLASS 7 SCIENCE 

IMPORTANT- KINDLY MARK YOUR ATTENDANCE ON THIS BLOG WITH A GREETING. DO NOT FORGET TO MENTION YOUR NAME AND ROLL NUMBER.

You will need : 
A SINGLE LINED NOTEBOOK WHICH IS NEATLY COVERED. MAKE SURE YOU HAVE USED THE INDEX AND WRITTEN TODAY'S DATE.


THE NOTEBOOK WILL BE EVALUATED SO KINDLY MAKE SURE YOU DO ALL YOUR WORK NEATLY.


At the end of this lesson you will be able to 
  1. State the precautions to be kept in mind while using a lab thermometer 
  2. Explain why Mercury is an ideal liquid for thermometers

Yesterday we had discussed the working of a lab thermometer, hope you have revised that.

LETS CONTINUE:

CERTAIN PRECAUTIONS :

[while using a lab thermometer]
1.The thermometer should be held vertical and surrounded by the liquid whose temperature
is to be read.
2. The bulb should not touch the bottom or sides of the beaker
3. The reading is to be taken without taking it out of the liquid.
4. The eye should be kept at level of mercury thread.
5. Never place it in very hot or very cold liquid, it will break


LET ME NOW ASK YOU A QUESTION : 
Have you ever looked at the thermometer used at home to record body temperature when you have fever ?
If you have you will noticed a silvery shiny liquid inside it, this is MERCURY. 
NOTE: this same liquid is used in other thermometers (in the lab).


DO YOU KNOW WHY MERCURY IS AN IDEAL CHOICE FOR THERMOMETERS ?
  • It is shiny and can be easily seen.
  • It does not stick to glass.
  • It expands and contracts uniformly.
  • It has a very high melting and boiling point.




Answer the following orally
  1. State any 3 precautions to be taken while reading the temperature on a laboratory thermometer.
  2. Give 3 reasons why mercury is an ideal liquid for thermometers.
  3. Use the link given for a better understanding of today's concepts. → Why mercury is used


HOTS 
 WHAT DO YOU THINK WILL HAPPEN TO THE READING IF A LABORATORY THERMOMETER IS TAKEN OUT OF THE LIQUID / SUBSTANCE AND THEN OBSERVED ? 



That is all for today


SEE YOU SOON 

Comments

  1. BhavnathChawariaMay 1, 2020 at 9:18 AM

    Good morning ma,am
    BhavnathChawaria

    ReplyDelete
  2. Aarav Vashistha 7BMay 1, 2020 at 9:18 AM

    Good morning ma'am Aarav Vashistha 7B

    ReplyDelete
  3. Kevin Tom BenoyMay 1, 2020 at 9:30 AM

    Good Morning Mam
    Kevin Tom Benoy 7B

    ReplyDelete
  4. Computer scienceMay 1, 2020 at 9:33 AM

    Good morning Ma'am shaurya Arora

    ReplyDelete
  5. Manmeet Singh BajwaMay 1, 2020 at 9:49 AM

    Good Morning Ma'am
    Manmeet Singh 7B

    ReplyDelete
  6. Krishna RawatMay 1, 2020 at 9:50 AM

    Good morning mam
    Krishna Rawat7B

    ReplyDelete
  7. Jatin GirotiMay 1, 2020 at 9:58 AM

    Good Morning Mam,
    Jatin Giroti 7B

    ReplyDelete
  8. UnknownMay 1, 2020 at 9:58 AM

    Good morning mam this is Derick Decastro my class is 7B

    ReplyDelete
  9. Alok Mahim TirkeyMay 1, 2020 at 10:00 AM

    Good morning mam Alok 7b

    ReplyDelete
  10. Loveleesh singhMay 1, 2020 at 10:01 AM

    Good morning mam loveleesh singh 7b

    ReplyDelete
  11. KamalMay 1, 2020 at 10:12 AM

    Good morning mam 7B kamal kumar

    ReplyDelete
  12. Anirudh AdlakhaMay 1, 2020 at 10:12 AM

    Good morning ma'am , Anirudh Adlakha 7B

    ReplyDelete
  13. Harshit RanjanMay 1, 2020 at 10:25 AM

    Good morning mam, Harshit Ranjan 7B

    ReplyDelete
  14. Armaan AroraMay 1, 2020 at 10:34 AM

    Good morning Mam Armaan Arora

    ReplyDelete
  15. Sol KamlaldinMay 1, 2020 at 10:35 AM

    Good morning Maam, SOL KAMLALDIN 7B

    ReplyDelete
  16. Arpit kumarMay 1, 2020 at 10:36 AM

    Good morning mam, arpit kumar from 7B

    ReplyDelete
  17. AryanMay 1, 2020 at 10:41 AM

    Good morning mam,Aryan 7B

    ReplyDelete
  18. PreetikaMay 1, 2020 at 10:42 AM

    GOOD MORNING BOYS

    ReplyDelete
  19. Aaron Xavier Jomon May 1, 2020 at 10:45 AM

    Good Morning mam. Aaron Xavier Jomon 7B

    ReplyDelete
  20. NishitMay 1, 2020 at 10:45 AM

    Good morning ma'am
    Nishit Kedia
    7B

    ReplyDelete
  21. Mohammed RayhanMay 1, 2020 at 10:46 AM

    Good morning ma'am
    Mohammed Rayhan 7B
    Roll no. -2

    ReplyDelete
  22. Jadon Stanley MinjMay 1, 2020 at 10:47 AM

    Good Morning Mam
    Jadon Stanley Minj 7B

    ReplyDelete
  23. AnonymousMay 1, 2020 at 10:48 AM

    Good morning ma'am, Rudra Joshi 7B

    ReplyDelete
  24. Devansh JindalMay 1, 2020 at 10:49 AM

    Good morning mam I am Devansh 7b

    ReplyDelete
  25. Danel S ShajiMay 1, 2020 at 10:50 AM

    Good morning Mam
    I am Theofin S Shaji
    7B

    ReplyDelete
  26. PreetikaMay 1, 2020 at 10:51 AM

    BOYS, I HAVE SENT A PICTURE OF QUES 10 ( difference between heat and temperature ) ,TO BE DONE IN YOUR SCIENCE NOTEBOOK , ON YOUR CLASS GROUP. ALL TO DO IT IN YOUR NOTEBOOK

    ReplyDelete
  27. VaibhavMay 1, 2020 at 10:52 AM

    Good morning ma'am!
    Vaibhav Vij 7-B

    ReplyDelete
  28. amyjoykapai@gmail.comMay 1, 2020 at 10:56 AM

    Good morning Ma'am
    Lamor Richut Kapai
    7B

    ReplyDelete
  29. Ayush ArunMay 1, 2020 at 10:59 AM

    GOOD MORNING MAM
    AYUSH ARUN 7-B

    ReplyDelete
  30. Gabriel johnMay 1, 2020 at 11:02 AM

    Good morning ma'am Gabriel John 7B

    ReplyDelete
  31. VINCENT ANTHONY PAULMay 1, 2020 at 11:03 AM

    Good morning mam I am Vincent Anthony Paul from class 7-B(01.05.20).

    ReplyDelete
  32. MungreiyoMay 4, 2020 at 7:38 AM

    Good morning mam Mungreiyo Ashimray.





    ReplyDelete

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