📝 Questions, Activities & Projects

1️⃣ Distance on Map

Q: Returning to Fig. 5.2 in Chapter 5, taking the scale 2.5 cm = 500 km, calculate the real distance from the estuary of the Narmada River to the estuary of the Ganga River.

Hint/Answer:

  • Measure the map distance (suppose ~4 cm).
  • If 2.5 cm = 500 km → 1 cm = 200 km.
  • So, 4 cm = 800 km (approx.).
    ✔️ Answer: The real distance is about 800 km.

📸 Image suggestion: Map of India with Narmada & Ganga estuaries marked.

2️⃣ Indian Standard Time

Q: Why is it 5:30 pm in India when it is 12 pm in London?

Answer:

  • Greenwich (London) = 0° longitude (GMT).
  • India’s standard meridian = 82.5°E.
  • Earth rotates 15° = 1 hr → 82.5 ÷ 15 = 5.5 hrs.
  • So, India = GMT + 5:30 hrs.

✔️ Answer: India is 5 hrs 30 mins ahead of London (GMT).

3️⃣ Symbols in Maps

Q: Why do we need symbols and colours in the map?

Answer:

  • Space on a map is limited.
  • Symbols make representation simple (🏥 Hospital, 🚉 Railway, 🌊 River).
  • Colours show different features (blue = water, green = forest, yellow = plains).

✔️ Answer: Symbols and colours help represent many features clearly in limited space.

4️⃣ Directions Activity

Q: Find out what you have in the eight directions from your home or school.

Activity:

  • Stand facing north.
  • Mark: North (↑), South (↓), East (→), West (←), and intermediate directions (NE, SE, SW, NW).
  • Note nearby landmarks in each direction.

📸 Image suggestion: Compass rose diagram with 8 directions.

5️⃣ Local Time vs Standard Time

Q: What is the difference between local time and standard time? (100–150 words, group activity)

Answer (Sample):

  • Local time: Calculated based on the longitude of a place. Every 15° = 1 hr difference. 🌞
  • Standard time: To avoid confusion, a country uses one meridian as reference.
  • Example: Assam is ahead of Gujarat in local time, but both follow IST.
    ✔️ Answer: Local time differs from place to place, but standard time is uniform across a country.

6️⃣ Difference in Time (Delhi vs Bengaluru)

Q: Delhi (29°N, 77°E) and Bengaluru (13°N, 77°E) have same longitude. What is the difference in their local time?

Answer:

  • Time depends only on longitude, not latitude.
  • Since both have same longitude (77°E), ✔️ Answer: No difference in time.

7️⃣ True/False Statements

Q: Mark the following as True/False with reasons.

  1. All parallels of latitude have the same length.
    ❌ False → They get smaller as we move towards poles.
  2. The length of a meridian of longitude is half of that of the Equator.
    ✔️ True → Equator is full circle, longitude is half-circle.
  3. The South Pole has a latitude of 90°S.
    ✔️ True → Defined as 90° south of Equator.
  4. In Assam, the local time and IST are identical.
    ❌ False → Assam is ahead in local time, but follows IST.
  5. Lines separating the time zones are identical with meridians of longitude.
    ❌ False → They zigzag to follow country borders.
  6. The Equator is also a parallel of latitude.
    ✔️ True → It is the largest parallel of latitude (0°).

🎯 Key Learning Outcomes

✔️ Learn how to measure distance on a map using scale.
✔️ Understand why IST is GMT+5:30 hrs.
✔️ Appreciate the importance of symbols and colours.
✔️ Differentiate between local time vs standard time.
✔️ Apply concept of latitudes & longitudes to real life.