DAV Class 4 SST Chapter 12 Question Answer Let Us Communicate

Master DAV Class 4 SST Chapter 12 Question Answer Let Us Communicate with complete, authentic solutions grounded in the DAV CMC textbook We and Our World. Covers personal communication, mass communication, artificial satellites, postal vs electronic media, and Value-Based questions.

A. Tick (✓) the correct option

1. A dancer communicates feelings through—
(a) Mudras
(b) Facial expressions
(c) Smiles
Answer: (a) Mudras
Reason: In classical Indian dances, stylized hand gestures called mudras express specific emotions and storytelling.

2. Choice of communication depends on—
(a) Interest
(b) Requirement
(c) Both
Answer: (c) Both
Reason: How we choose to communicate depends on whether the message is urgent, formal, personal, and which medium is convenient.

3. We can get money order through a—
(a) Post office
(b) Bank
(c) Airport
Answer: (a) Post office
Reason: The postal department issues and delivers traditional money orders across villages and towns.

4. A satellite helps in transmitting—
(a) Pictures
(b) International call
(c) Both
Answer: (c) Both
Reason: Communication satellites in space relay intercontinental telephone signals, television footage, images, and internet data.

B. Fill in the blanks

Help Box: Alexander Graham Bell, send or receive, electronic, oldest, teleconferencing

1. Means of communication help to send or receive a message.

2. Postal service is the oldest means of communication.

3. Telephone was invented by Alexander Graham Bell.

4. Computer is an electronic device.

5. Many people can exchange their views while sitting in different places through teleconferencing.

C. Match the following

D. Answer the following questions

Question 1: In which two ways is a telephone better than a letter?
Answer:
1. Instant Communication: A telephone provides instant, real-time two-way verbal communication without waiting days for postal transit.
2. Immediate Feedback: Allows immediate clarity and voice emotion, which is essential during urgent emergencies.

Question 2: Mention three advantages of print media.
Answer:
1. Affordable & Accessible: Newspapers and magazines are very inexpensive and reach remote corners.
2. Permanent Record: Written articles can be archived, kept, and reread anytime.
3. No Electricity Needed: Can be read without digital batteries, smartphones, or internet access.

Question 3: What is an artificial satellite? Mention two main advantages of a satellite.
Answer: An artificial satellite is a human-made spacecraft placed into Earth’s orbit to gather and relay scientific data, images, and signals.
Two advantages:
1. Transmits live worldwide television broadcasts, internet connections, and international mobile phone calls.
2. Tracks weather conditions, cloud patterns, and gives early warnings for cyclones and tsunamis.

Question 4: Comment on the statement “Films create awareness.”
Answer: Cinema combines powerful storytelling, audio, and visual drama to highlight real-life social problems (like child labor, pollution, poverty, girl-child education), creating deep emotional understanding and inspiring positive societal reform.

Question 5: Why is it important to limit television time of children? Give three arguments in favour of your answer.
Answer: It is essential to limit TV screen time because:
1. Eye Strain & Health: Continuous staring causes poor eyesight, headaches, and physical obesity.
2. Study Distraction: Excessive viewing cuts into study, reading, and homework hours.
3. Loss of Outdoor Play: Reduces time spent running in fresh air, playing games with friends, and engaging in creative hobbies.

Value-Based Question