Chapter 3 | Locating Places on the Earth | Class- 6 DAV Social Science Solutions

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A. Tick the correct Option:

1. The equator does not pass through which one of the following continents?

2. The heat zone lying between 231/2% N and 661/2% N is-

3. The longest circle drawn midway between two poles is-

4. When the time is 12 noon at 0° longitude, the time at 75 E longitude will be-

5. Which one of the following is a correct statement about longitudes?

Answer: All of them have equal lengths.

B.Fill in the blanks

1. The earth rotates from ___________ to ___________.

2. All the places on the same meridian will have the ___________ local time.

3. The distance between the two lines of latitudes is always ___________.

4. The ___________ are the imaginary lines that connect the north and south pales.

5. Each degree of longitude corresponds to a time difference of ___________ minutes.

Answer: (1) West, East (2) same (3) equal (4) longitude (5) four

Ans:

D. Answer the following questions in brief.

1. Which two basic points on the earth serve as the reference points?

Ans: (i) North Pole (ii) the South Pole

2. Mention the latitudinal location of the heat zones of the earth.

Ans: The latitudinal location of the heat zones of the earth are:

3. Why does the Torrid zone have the maximum temperature?

Ans: The torrid zone receives the maximum amount of heat throughout the year because the rays of the sun fall vertcally on this regon. This is located between the tropic of Cancer and Tropic of Capricorn in 23 1/2N to 23 1/2 S.

4. What is the significance of Greenwich Mean Time?

Ans: Greenwich Mean Time helps to know the international time and local time of a country.

5. Why is the Standard Meridian selected by a country a multiple of 7.5°?

Ans: The Standard Meridian selected by a country is a multiple of 7.5° because 15 degrees of longitude is equivalent to 1 hour in time (that is 360 / 24) it is convenient to adopt time zones at 7.5 degrees or 15 degrees multiples.In other words time zones are separated by multiples of 1 hour or 1/2 hour.

1. State three main characteristics of parallels of latitudes.

Ans: Three main characteristics of parallels of latitude are:

• Each degree of latitude is divided into 60 minutes and a minute is further sub-divided into 60 seconds.
• These lines are parallel to each other and are of equal distance to each other and hence are called parallels of latitude.
• Only the Equator is a Great Circle, all the rest of the latitudes are Small Circles.

2. Why do we use standard time? Explain with an example from India.

Answer: We know that places located on different meridians have different local times. It would create a lot of difficulties if a country adopts different local times.

For example, India lies between 68° 7’E and 97° 25’E longitudes. Thus, the people of India have to face problems of different local times. So, to avoid this problem and maintain its uniformity all over. a country, the standard time is used.

3. Which heat zone is most suitable for us to live and why?

Ans: Temperate zone is most suitable for us to live because the sun rays in this zone are never directly overhead. The angle of the sunrays decreases as we go towards the poles. That is why this zone is neither very hot nor very cold. They have moderate temperature.

4. Why is the time difference between each meridian of longitude 4 minutes? Explain.

Ans:

The Earth rotates once a day, so that’s 360 degrees (the number of degrees in a circle) in 24 hours. If you do the math, that’s 360/24 = 15 degrees per hour. That is why, the time difference between each meridian of longitude is 4 minutes.

5. Distinguish between Equator and Prime Meridian.

Ans: