Ch.2 Motions of the Earth

Chp 2. MOTIONS OF THE EARTH

 

1. What’s the solution ?

Amit wants to take his granny to Australia which is in the southern hemisphere. But she cannot bear very cold weather. When should they make this trip ?

Ans. (a) Amit’s granny cannot bear cold weather. Hence, she should visit Australia during summer. (b) Australia is situated in the southern hemisphere. It experiences summer season during the period of 23rd September to 22nd March. (c) Considering this, they should make the trip to Australia anytime between October to mid-March.

 2. Use your brain power!

(i) How many rotations does the earth complete during one revolution around the sun?

 Ans: The earth completes one rotation in 1 day. It takes 365 days and 6 hours i.e., 1/4 day to complete one revolution. This means, during one revolution around the sun, the earth performs 365 and 1/4 rotations.

 (ii) It is sunrise at Itanagar in Arunachal Pradesh. Write the names of the following cities in the order in which the sun will rise there. Mumbai (Maharashtra), Kolkata (West Bengal), Bhopal (Madhya Pradesh), Nagpur (Maharashtra).

Ans: The earth rotates from west to east. The sunrise is observed earlier in the eastern states and gradually it is seen by western states of India. The order in which the sun will rise in the given cities is: Itanagar (Arunachal Pradesh), Kolkata (West Bengal), Nagpur (Maharashtra), Bhopal (Madhya Pradesh) and Mumbai (Maharashtra)

3.Fill in the blanks

(You must write the answers for this question on your own)

4. What is meant by each of the following terms?

 (i) Full moon (ii) New moon (iii) Lunar month (iv) Tithi

 Ans: (i) Full moon: When a complete and round moon is seen in the sky, it is called as full moon.

 (ii) New moon: When the moon is not at all visible in the sky from the earth, it is called as new moon.

 (iii) Lunar month: The duration of 28 to 30 days between a new moon to the next new moon is called a lunar month.

 (iv) Tithi: Every day of the lunar month is called as tithi.

5. Answer the following questions.

(i) What is the equator?
 Ans: (i) An imaginary circle around the surface of the earth, exactly in between the north and south poles is called the equator.

(ii) What are the two parts of the earth made by the equator ?

Ans: The two parts of the earth made by the equator are: (a) Northern hemisphere (b) Southern hemisphere

**********************************************************

Dr. Homi Bhabha Balvaidnyanik Competition 2021-2022

Dr. Homi Bhabha Balvaidnyanik Competition is conducted by The Greater Bombay Science Teachers' Association since 1981 to encourage students to take interest in science, to inculcate scientific attitude and to search science talent in students and motivate them towards basic sciences as well as to clear the scientific concepts among them.

1. Who can participate: - Students studying only in 6th std. and 9th std.
2. Medium :- English and Marathi
   (Note :- Students from Semi-English can choose medium either English or Marathi as per their comfort level but once selected medium should be remains same for all the remaining phases of the competition.)
3. Boards :- All Boards (Maharashtra SSC / CBSE / ICSE / IB etc.

Syllabus

Less emphasis will be given for knowledge based questions and more emphasis for understanding, reasoning, correlation, application etc. Majority of the questions will be from Maharashtra state board science text books and Content related to the above from ICSE,IB and CBSE science textbooks. The questions related to general knowledge in science and science around day to day life.

1. For 6th std.- Textbooks of 4th ,5th and 6th std. of S.S.C. syllabus and Content related to the above from ICSE ,IB and CBSE books.

a) Approximately 10 % questions on 4th std. syllabus, 
b) Approximately 20 % questions on 5th std. syllabus, 
c) Approximately 60 % questions on 6th std. syllabus, 
d) Approximately 10 % questions on General knowledge in science.

2. For 9th std. - Textbooks of VII ,VIII and IX std of S.S.C. syllabus and Content related to the above from ICSE,IB and CBSE books. 

a) Approximately 10 % questions on 7th std. syllabus 
b) Approximately 20 % questions on 8th std. syllabus,
 c) Approximately 60 % questions on 9th std. syllabus, 
d) Approximately 10 % questions on General knowledge in science

Fees

Competition Fee :- ( per student)
Don’t deposit competition fee in bank, pay online.

1. Rs. 250 /- For All regions & All types of schools (With Regular Fee) 
2. Rs. 300 /- For Individual registration ( Students who are not able to register his /her name through school.) 

 

Stages of Competition :-

1. 1. Phase I : Online theory competition
   2. Phase II :Online practical competition
   3. Phase III :A. Online General interview and B. OnlineSubmission and evaluation of action research project

Structure of the Competition

DR. HOMI BHABHA BALVAIDNYANIK COMPETITION SCHEDULE 2021-22

Sr. no	Description	Details
1	Accepting online entry forms (Registration)	Tuesday. 17th Aug. 2021 to Thursday 16th Sep. 2021
2	Accepting online entry forms with late fee Rs 50 per student	Wedn. 17th Sep. 2021 to Thursday 30th Sep. 2021 @ 5 PM
3	Online Theory competition	Std: 9th (Tentative) Sun. 21st Nov.2021(Slot wise) Std: 6th (Tentative) Sun. 28th Nov.2021(Slot wise)
4	Result of theory competition	Tentative 2nd week of December 2021
5	Online practical competition	Std: 9th(Tentative) Sun. 9th Jan. 2022 Std: 6th(Tentative) Sun. 16th Jan. 2022
6	Result of practical competition	Tentative 1st week of Feb. 2022
7	Submission of action research project report	Tuesday15th March 2022
8	General Interview	Tentative Sun. 20th March 2022
9	Action Research Project Interview	Tentative Sun. 27th March 2022
10	Online Prize Distribution Ceremony	Tentative Sun. 10th April 2022

Please Note : Note: Please note that in view of pandemic situation (Covid -19), Organizer’s reserve the right to make change in schedule on any stage of competition.
Contacts : The incharge allotted to your region ¼ Call only between 9 am to 6 pm½

Contact Numbers of incharge with region

1) Mumbai region
¡) Smt. Amruta Sawant 9167335197 

ii) Shri.Mahadev Yadav 9221350354

Web address: www.msta.in

Yoga Quiz 2021

for more details visit:

https://quiz.mygov.in/quiz/international-day-of-yoga-2021-quiz/

Ch.1.Our Earth and Our Solar System (Std.5)

Ch.1. Our Earth and Our Solar System

Sample answer is given below..

               Photosynthesis Process

TextBook Page No.5

VII Science Semester II Portion

Portion.

11 Cell structure 

12. The muscular system 

13.Changes-Physical and chemical

14.Elements,compounds & mixtues

15.Materials we use

16.Natural resources

17. Effects of light

18.Sound: Production of sound

19.Properties of a magnetic field

Mode of Exam: Offline (written) at home

Total Marks: 50

Math solution(sample)

Q.If the cost of 1 sq m of a plot of land is Rs.900, find the cost of a plot of land that is 25m long and 20m broad.

Solution:

Given: length = 25 m

          breadth = 20 m

To find the cost of a plot of land,

first , we need to know the AREA

∴area of a plot of land = length X breadth 

                                     = 25 X 20

                                     = 500 

 Total area of a plot of land= 500 sq m

the cost of 1 sq m of a plot of land is Rs.900,

∴cost of 500 sq m plot = 500 X 900

                                      = 450000

                                      =Rs.4,50,000

Answer: The cost of a plot of land is Rs.4,50,000

Semester II Mathematics Portion

Semester- II Portion

Subject:Mathematics

Ch.5.Fractions

Ch.8.Multiples and Factors

Ch.9.Decimal Fractions

Ch.10. Measurement of Time

Ch.11.Problems on Measurement

Ch.12.Perimeter and area

Ch.14.Pictographs

Ch.15.Patterns

Mode of Semester Exam:

Offline      - 40 marks (written)

Oral Exam  -10 marks

 Activities:

Ch.15. Patterns -10 marks

(Solve Problem set No.53)

Ch.13.Three Dimensional Objects and Nets-10 marks

(Solve Problem set No.51)

Fair and Square (10 marks)

Text book page no.74

 email your activity