Friday, 11 July 2025

Quiz-1 on ISRO

Q1: Who was the founder of ISRO?
   a) Vikram Sarabhai
   b) Homi J. Bhabha
   c) A.P.J. Abdul Kalam
Answer: a) Vikram Sarabhai

Q2: In which year was ISRO established?
   a) 1962
   b) 1969
   c) 1971
Answer: b) 1969

Q3: Where is ISRO's headquarters located?
   a) Bengaluru
   b) Hyderabad
   c) Chennai
Answer: a) Bengaluru

Q4: Which was India’s first satellite?
   a) Bhaskara
   b) Aryabhata
   c) Rohini
Answer: b) Aryabhata

Q5: When was Aryabhata launched?
   a) 1975
   b) 1980
   c) 1972
Answer: a) 1975 (April 19)

Q6: Which rocket carried Aryabhata into space?
   a) GSLV
   b) PSLV
   c) Kosmos-3M
Answer: c) Kosmos-3M

Q7: Which country helped India launch its first satellite?
   a) USA
   b) USSR
   c) France
Answer: b) USSR

Q8: What does PSLV stand for?
   a) Polar Satellite Launch Vehicle
   b) Planetary Satellite Launch Vehicle
   c) Payload Satellite Launch Vehicle
Answer: a) Polar Satellite Launch Vehicle

Q9: Which was India’s first successful satellite launch vehicle?
   a) SLV-3
   b) GSLV Mk III
   c) PSLV-C37
Answer: a) SLV-3

Q10: When did India successfully launch its first lunar mission, Chandrayaan-1?
   a) 2008
   b) 2006
   c) 2010
Answer: a) 2008 (October 22)

Q11: Which rocket launched Chandrayaan-1?
   a) PSLV-C11
   b) GSLV Mk II
   c) SLV
Answer: a) PSLV-C11

Q12: Which satellite helped India detect water molecules on the Moon?
   a) Mangalyaan
   b) Chandrayaan-1
   c) GSAT-6
Answer: b) Chandrayaan-1

Q13: What is the name of India's Mars mission?
   a) Mangalyan
   b) Mangalyaan
   c) Mahalyan
Answer: b) Mangalyaan

Q14: When was Mangalyaan launched?
   a) 2013
   b) 2012
   c) 2015
Answer: a) 2013 (November 5)

Q15: What was Mangalyaan’s main objective?
   a) Study Saturn’s atmosphere
   b) Study Mars’ surface and atmosphere
   c) Study the Sun’s corona
Answer: b) Study Mars’ surface and atmosphere

Q16: Which was the first Indian spacecraft to reach Mars?
   a) Chandrayaan-2
   b) Mangalyaan
   c) GSAT-7
Answer: b) Mangalyaan

Q17: ISRO achieved its first interplanetary mission to Mars on its?
   a) First attempt
   b) Second attempt
   c) Third attempt
Answer: a) First attempt

Q18: When was Chandrayaan-2 launched?
   a) 2018
   b) 2019
   c) 2020
Answer: b) 2019 (July 22)

Q19: Which rocket launched Chandrayaan-2?
   a) PSLV-C25
   b) GSLV Mk III
   c) GSLV Mk II
Answer: b) GSLV Mk III

Q20: What was the name of the lander on Chandrayaan-2?
   a) Pragyan
   b) Vikram
   c) Yaan
Answer: b) Vikram

Q21: Which ISRO satellite is responsible for weather forecast?
   a) Cartosat
   b) GSAT
   c) INSAT
Answer: c) INSAT

Q22: What does GSLV stand for?
   a) Geostationary Satellite Launch Vehicle
   b) Global Satellite Launch Vehicle
   c) Gravitational Satellite Launch Vehicle
Answer: a) Geostationary Satellite Launch Vehicle

Q23: Which mission made India the first Asian country to reach Mars orbit?
   a) Chandrayaan-1
   b) Mangalyaan
   c) Astrosat
Answer: b) Mangalyaan

Q24: What is the name of ISRO’s navigation satellite system?
   a) GPS
   b) GAGAN
   c) NavIC
Answer: c) NavIC

Q25: Which ISRO satellite is used for mapping and remote sensing?
   a) Cartosat
   b) INSAT
   c) GSAT
Answer: a) Cartosat

Q26: What was ISRO’s first indigenously developed launch vehicle?
   a) SLV-3
   b) GSLV Mk III
   c) PSLV
Answer: a) SLV-3

Q27: Which is the heaviest satellite ever launched by ISRO?
   a) GSAT-11
   b) INSAT-3D
   c) Cartosat-3
Answer: a) GSAT-11

Q28: What does the ISRO satellite GSAT stand for?
   a) Geo-Stationary Satellite
   b) General Satellite
   c) Geosynchronous Satellite
Answer: c) Geosynchronous Satellite

Q29: What was the weight of Chandrayaan-2’s orbiter?
   a) 2,379 kg
   b) 1,480 kg
   c) 3,290 kg
Answer: a) 2,379 kg

Q30: What is the name of ISRO's human spaceflight mission?
   a) Gaganyaan
   b) Bharatiyaan
   c) Vyomanaut
Answer: a) Gaganyaan

Q31: When is ISRO planning to launch Gaganyaan?
   a) 2024
   b) 2022
   c) 2025
Answer: a) 2024 (December)

Q32: Who was the first Indian astronaut to travel to space?
   a) Rakesh Sharma
   b) Kalpana Chawla
   c) Sunita Williams
Answer: a) Rakesh Sharma

Q33: In which year did Rakesh Sharma go to space?
   a) 1984
   b) 1992
   c) 1980
Answer: a) 1984 (April)

Q34: Which launch vehicle was used for India’s Mars Orbiter Mission?
   a) PSLV
   b) GSLV
   c) SLV
Answer: a) PSLV

Q35: What does ISRO’s Astrosat study?
   a) Earth’s atmosphere
   b) Outer space phenomena
   c) Solar energy
Answer: b) Outer space phenomena

Q36: Which ISRO satellite series is dedicated to communication?
   a) GSAT
   b) INSAT
   c) Cartosat
Answer: a) GSAT

Q37: Which PSLV mission set a record by launching 104 satellites in one go?
   a) PSLV-C37
   b) PSLV-C40
   c) PSLV-C49
Answer: a) PSLV-C37

Q38: What is the primary purpose of ISRO’s RISAT series?
   a) Weather monitoring
   b) Military surveillance
   c) Oceanography
Answer: b) Military surveillance

Q39: Which satellite marked ISRO’s 100th mission?
   a) GSAT-10
   b) PSLV-C21
   c) INSAT-4CR
Answer: b) PSLV-C21

Q40: What is the primary objective of ISRO’s Cartosat satellites?
   a) Communication
   b) Earth observation and mapping
   c) Weather forecasting
Answer: b) Earth observation and mapping

Q41: Which ISRO launch vehicle is known as “the workhorse”?
   a) PSLV
   b) GSLV Mk III
   c) SLV-3
Answer: a) PSLV

Q42: Which ISRO satellite is used for disaster management and resource monitoring?
   a) Resourcesat
   b) Oceansat
   c) Cartosat
Answer: a) Resourcesat

Q43: Which Indian satellite was developed for studying the Sun?
   a) Aditya-L1
   b) Mangalyaan
   c) Chandrayaan-2
Answer: a) Aditya-L1

Q44: What is the name of ISRO’s mission to explore asteroids?
   a) Mangalyaan-2
   b) Shukrayaan
   c) Astrosat
Answer: b) Shukrayaan

Q45: How many stages does the PSLV rocket have?
   a) 2
   b) 3
   c) 4
Answer: c) 4

Q46: Which ISRO satellite provides high-resolution images for urban and rural planning?
   a) Cartosat-3
   b) GSAT-11
   c) INSAT-4A
Answer: a) Cartosat-3

Q47: What is the duration of the mission for Mangalyaan (Mars Orbiter Mission)?
   a) 2 years
   b) 6 months
   c) 6 months (but lasted for over 7 years)
Answer: c) 6 months (but lasted for over 7 years)

Q48: Which ISRO mission was specifically designed to explore Venus?
   a) Aditya-L1
   b) Chandrayaan-3
   c) Shukrayaan
Answer: c) Shukrayaan

Q49: What is the highest number of satellites ISRO has launched in a single mission?
   a) 92
   b) 104
   c) 80
Answer: b) 104

Q50: What is the full form of ISRO?
   a) Indian Space Research Organization
   b) International Space Research Organization
   c) Indian Satellite Research Organization
Answer: a) Indian Space Research Organization
=========================================================

Wednesday, 26 March 2025

Mathematics, Science and English books

Mathematics and Reasoning books

English books

Science books

Mixed books and worksheets

Friday, 21 March 2025

IIT Foundation books

Class-6-IIT Foundation books Class-7-IIT Foundation books Class-8-IIT Foundation books Class-9-IIT Foundation books Class-10-IIT Foundation books

class-1-Olympiad books class-2-Olympiad books class-3-Olympiad books class-4-Olympiad books class-5-Olympiad books class-6-Olympiad books class-7-Olympiad books class-8-Olympiad books Talent Olympiad Exam Resource Book

Wednesday, 19 March 2025

Logiqids worksheets

Logiqids worksheets for class-4

Logiqids worksheets for class-5

Sunday, 16 March 2025

Tracing & Coloring Worksheets

Tracing Alphabet Tracing Numbers Coloring Short Story books

Thursday, 22 August 2024

class-5 Composite Mathematics

Thursday, 12 October 2023

Speech on Navratri

The word Navratri is derived by combining of two Hindi words - 'Nav' and 'Ratri' .
'Nav' means nine and 'Ratri' means nights so this festival celebrated for nine-nights.
This festival is also known as Nav-Durga, that means nine forms of Goddess Durga.
On 10th day we celebrate Vijya-Dashmi that also known as Dushera.
It's celebrated as a victory day of Maa Durga on the demon Mahishasura.
On this day we worship Goddess Durga for prosperity and good health.
Navratri is the most auspicious and widely celebrated Hindu festivals.
It is celebrated by the people with great joy and happiness.
We worship Goddess Durga with all our devotion.
Some people do fast for all nine days with different ways.
In most of the places across the country, people decorate pandals of Idol of Maa Durga.

Tuesday, 17 January 2023

Mass Communication

Do you know , what is communication ?

1. Communication means exchanging messages, ideas and thoughts.

2. We communicate by speaking, writing through facial expression and actions.

3. Mass communication is the way to communicate to many people at the same time.

4. Types of mass communications are :-

Print Media
Broadcast Media
Outdoor & Transit Media
Digital Media

Let's discuss about digital media.

Examples of Digital Media are :-

Social Media
Video Platform
Websites
Mobile Apps
E-books
Podcasts, Online Radio

Now a days we are sharing our feeling, thoughts and other things through social media like Facebook, Instagram and WhatsApp.

Many Videos platform are like Netflix, Amazon Prime videos, YouTube and Zee5.

We can see movies, serials and educational videos on those platform.

Mobile Apps are also the medium to play games, watch videos and do many more.

Thursday, 10 November 2022

Speech on Dog

The Best Speech on Dog

The dog is a pet animal.
A dog has sharp teeth so that it can eat flesh very easily.
It is a very clever animal and is very useful in catching thieves.
It runs very fast, barks loudly and attacks on strangers.
A dog saves the life of the master from danger.
We can find dogs everywhere in the world.
Dogs are a very faithful animal.
it has a sharp mind and a strong sense of smelling the things.
They are intelligent and work as guard for our homes.
They always give security to the owner day and night.
Dogs are a very excellent swimmer, and they can jump from anywhere.
Dogs are liked due to its faithfulness.
The dogs have many colors such as grey, white, black, brown and red.
They are many types such as bloodhound, greyhound, German shepherd, Labrador, Rottweiler, bulldog poodle, etc.
Usually, the dog eats fish, meat, milk, rice, bread, etc.
The lifespan of a dog is very small however it can live around 12-15 years long which depend on their size such as smaller dogs live a longer life.
A female dog gives birth to a baby and feed milk that’s why dogs come under the mammal category.
The dog baby is called a puppy or pup and dog home is called kennel.
The Military trains the dogs to track and detect bombs.
They are really a very helpful pet animal.
We should take good care of them and keep them in good condition.

Wednesday, 21 September 2022

Divisibility Rules

Divisibility Rules

Divisibility rules - Divisibility rules are a set of guidelines that help to determine if one number is divisible by another without having to perform the actual division. Here are some of the most common divisibility rules:

Divisibility by 2: A number is divisible by 2 if its last digit is even (0, 2, 4, 6, 8).
Divisibility by 3: A number is divisible by 3 if the sum of its digits is divisible by 3.
Divisibility by 4: A number is divisible by 4 if the last two digits of the number are divisible by 4.
Divisibility by 5: A number is divisible by 5 if its last digit is either 0 or 5.
Divisibility by 6: A number is divisible by 6 if it is divisible by both 2 and 3.
Divisibility by 7: There is no easy rule for determining if a number is divisible by 7.
Divisibility by 8: A number is divisible by 8 if the last three digits of the number are divisible by 8.
Divisibility by 9: A number is divisible by 9 if the sum of its digits is divisible by 9.
Divisibility by 10: A number is divisible by 10 if its last digit is 0.
Divisibility by 11: A number is divisible by 11 if the difference between the sum of the digits in the odd positions and the sum of the digits in the even positions is either 0 or divisible by 11.

Note that these are just general rules and may not always apply, especially for very large numbers.

Explanation with examples -

Divisibility by 2: A number is divisible by 2 if its units place has 0 or 2 or 4 or 6 or 8.

Example - 3450, 3502, 9324, 6536, 7618

All above numbers are divisible by 2 as these numbers have 0 or 2 or 4 or 6 or 8 in last digit.

Divisibility by 3: A number is divisible by 3 if the sum of digits is a multiple of 3.

Example - 852

sum of digits = 8 + 5 + 2 = 15

Since sum of digits (15) is divisible by 3, so number 852 is divisible by 3.

Divisibility by 4:

Rule1 - A number is divisible by 4, if the number formed by its last 2 digits is divisible by 4.

Examples - 40832

Here last 2 digits form 32 which is divisible by 4, so number 40832 is divisible by 4

Rule2 - Add twice the digit of the tens place to the digit of the unit place of the number.

Example - 5096

(2 × 9) + 6 = 24

The number formed 24 which is divisible by 4, so number is divisible by 4.

Rule3 - If the digit at the tenth position is even and the unit place is 0, 4, or 8.

Example - 3548

Tenth place digit is 4 which is even and last digit is 8 so number 3548 is divisible by 4.

Rule4 - If the digit in the tens place is odd and the unit place is 2, or 6.

Example - 40832

Tenth place digit is 3 which is odd, and the last digit is 2 so number 40832 is divisible by 4.

Divisibility by 5: A number is divisible by 5 if its units place is 0 or 5.

Example - 4565

Last digit is 5 so number is divisible by 5.

Divisibility by 6: A number is divisible by 6 if it is divisible by 2 and 3 both.

Example - 96

Last digit is 6 (even number) so number is divisible by 2.

Sum of digits (9 + 6 = 15) which is divisible by 3 so number 96 is divisible by 3.

Sunday, 31 July 2022