NCERT Solutions for Class 6 Social Chapter 3 - Motions Of The Earth

Exercises

1. Answer the following questions briefly.

1. What is the angle of inclination of the earth's axis with its orbital plane?

Ans: The angle of inclination of the earth's axis with its orbital plane is 66 ½ ° .

2. Define rotation and revolution.

Ans: Rotation: It is a movement of the Earth on its own axis. It takes 24 hours for earth to complete one rotation. This movement of the planet Earth on its own axis is considered as responsible for day and night on earth.

Revolution: This is the 360° movement of Earth in its orbit around the sun. It takes 365 ¼ days to complete one revolution. This causes seasons on earth.

3. What is a leap year?

Ans: Each revolution of earth takes 365 ¼ days i.e 365 days and 6 hours. These 6 hours sums up to 24 hours i.e one day in a span of 4 years. This one extra day is added to the month of February every fourth year and it has 29 days instead of 28 days. So, this year has 366 days and is called leap year. 

4. Differentiate between the Summer and Winter Solstice.

Ans: Summer Solstice: On 21st June, the sun rays directly fall on the Tropic of Cancer and the Northern Hemisphere is tilted towards the sun. The areas near the pole receive minimal heat because of the slanting rays. The North Pole of the Earth is said to be inclined towards the sun and the places beyond the Arctic Circle experience continuous daylight for about six months. All these conditions are reversed in the Southern Hemisphere and it is winter season there. The nights are longer than days. This is called the Summer Solstice.

Winter Solstice: In this, the Tropic of Capricorn receives direct rays from the sun as the south pole tilts towards the sun. This takes place on 22nd December every year. It is the summer season in the Northern Hemisphere whereas it is exactly opposite in the Southern Hemisphere i.e the presence of summer. The regions experiencing winters have longer nights than days. This is called the Winter Solstice.

5. What is an equinox?

Ans: An equinox is a phenomenon when the sun rays directly fall on the equator. At this position the whole of the earth experiences equal days and nights as neither of the poles are tilted towards the sun. This occurs twice a year on 21st March and 23rd September.

6. Why does the Southern Hemisphere experience winter and Summer Solstice in different times than that of the Northern Hemisphere?

Ans: The Southern Hemisphere experiences winter and Summer Solstice in different times than that of the Northern Hemisphere because the poles tilt towards the sun during different times. 

7. Why do the poles experience about six months day and six months night?

Ans: The poles experience about six months days and six months night because each of the poles remains tilted towards the sun for six months straight. So, this continuous tilt causes the poles to experience about six months day and when the other pole tilts towards the sun it causes six months night. 

2. Tick the correct answer.

(a) The movement of the earth around the sun is known as 

(i) Rotation

(ii) Revolution

(iii) Inclination

Ans: (ii) Revolution

(b) Direct rays of the sun fall on the equator on

(i) 21 March

(ii) 21 June

(iii) 22 December

Ans: (ii) 21 June

(c) Christmas is celebrated in summer in

(i) Japan

(ii) India

(iii) Australia 

Ans: (iii) Australia

(d) Cycle of the seasons is caused due to

(i) Rotation

(ii) Revolution

(iii) Gravitation

Ans: (ii) Revolution

3. Fill in the blanks.

1. A leap year has _____ number of days.

Ans: 366 days

2. The daily motion of the earth is ____ .

Ans: rotation

3. The earth travels around the sun in _____ orbit.

Ans: elliptical

4. The sun's rays fall vertically on the Tropic of _____  on 21 st June.

Ans: cancer

5. Days are shorter during _____ season.

Ans: Winter

NCERT Solutions for Class 6 Social Science Geography The Earth Our Habitat

NCERT Solutions for Class 6 Social Science Geography The Earth Our Habitat- Chapter-Wise Solutions

These are the NCERT chapters of The Earth Our Habitat Class 6 Geography Social Science well explained on Vedantu’s online platform. All the chapters of NCERT Class 6 Social Science Geography - The Earth Our Habitat with the revised syllabus and questions for practice are given on Vedantu.

Find Easy and Section Wise NCERT Solutions for Class 6 Social Science Geography Chapter 3

NCERT Class 6 Social Science Geography Chapter 3 Motions of the Earth explains about the rotations of the earth, how the dynamics of the earth works with the rest of the universe. The earth has two kinds of motions that are rotation and revolution. The Earth spins around its axis from west once in 24 hours, this movement is called rotation. It also moves around the sun in a fixed path that is called Earth’s orbit in about 365 ¼ days, this movement is called revolution. This chapter also explains how the rotation of the Earth works.

The Earth receives light from the sun. Because of this movement, the part of the Earth which faces the Sun is lighted up. We call it the day, and the rest part which is not lightened up by the Sunlight becomes dark and we call it night. If the earth does not rotate, then the portion facing towards the Sun would have the day forever with continuous warmth and the other half would have night forever with cold all the time. In such conditions, life would not have been possible on the Earth.

The chapter Motions of the Earth also explains the revolution of the Earth. The revolution around the Sun is executed by our earth when it moves around the sun at a speed of 96000 kilometres per hour. NCERT Class 6 Geography Chapter 3 motion of the earth describes us about the increasing and decreasing days and nights. It also clears the concept of the changing seasons of the Earth that occurs every year. The information about Polar days and nights is also provided in this chapter. When it is summer season (from March to September) in the Northern Hemisphere, the sun shines for 24 hours on the Northern Pole, it never sets. This situation prevails at the North Pole for six months. Likewise, there is a summer season in the Southern Hemisphere (September- March), so because of this, there are six-month-long nights at the North Pole and vice-versa. This chapter also explains the seasons that are experienced every year in the different parts of the world.

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Conclusion 

Vedantu's NCERT Solutions for Class 6 Social Science Chapter 3, "Motions of the Earth," are an invaluable resource for young learners. These solutions align seamlessly with the NCERT curriculum, providing comprehensive explanations and insights into the Earth's dynamic movements and their impact on our planet. Vedantu's commitment to quality education is evident, as these solutions ensure that students receive the guidance they need to excel in their social science studies. By utilizing these NCERT Solutions, students can enhance their scientific knowledge, critical thinking abilities, and overall academic performance, fostering a deeper understanding of the intricate motions that shape our world and the profound effects they have on our daily lives.