SEBA Class 6 Social Science (English Medium) Chapter 3 – “Motions of the Earth” Summary & Solutions
SEBA Class 6 Social Science (English Medium) Chapter 3 – “Motions of the Earth” solutions are available at Ospin Academy. We provide SCERT-based textbook answers, multiple-choice questions (MCQs), and a detailed chapter summary to assist students in their exam preparation.
📖 Chapter Overview:
This chapter delves into the two primary movements of the Earth: rotation and revolution, and how these motions influence phenomena such as day and night, and the changing seasons.
- Rotation: The Earth’s spin on its axis causing day and night cycles.
- Revolution: The Earth’s orbit around the Sun leading to seasonal changes.
- Circle of Illumination: The division between the Earth’s day and night sides.
- Leap Year: An extra day added every four years to account for the Earth’s orbital period.
- Assam’s Perspective: Understanding local seasonal variations and their impact on agriculture and daily life.
📌 Key Topics Covered:
- ⭐ What causes day and night?
- ⭐ How do Earth’s movements result in different seasons?
- ⭐ What is the significance of solstices and equinoxes?
- ⭐ Why do we have leap years?
- ⭐ How do these motions affect life in Assam?
📝 How Ospin Academy Assists in Exam Preparation:
- ✅ Comprehensive Solutions: Detailed answers based on the SCERT Class 6 Social Science English Medium textbook.
- ✅ Practice Questions: MCQs and additional exercises to reinforce learning.
- ✅ Conceptual Clarity: Simplified explanations with examples relevant to Assam.
- ✅ Quick Revision: Concise notes for efficient last-minute study sessions.
To access complete solutions for SEBA Class 6 Social Science (English Medium) Chapter 3 – “Motions of the Earth,” visit Ospin Academy today!
Class 6 Social Science (English Medium) PDF Solutions 2025-26 | SCERT Assam
Download Class 6 Social Science PDF for SCERT Assam English Medium students. Get the textbook, short question answers, and MCQ type answers for Geography, History, Economics, and Political Science. Ideal for exam preparation with downloadable study materials.
Exercise |
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1. Answer the following question:
(a) At what degree angle the axis of the earth is inclined?
Ans: The Earth’s axis of rotation is tilted at an angle of 23.5 degrees relative to the vertical line perpendicular to the plane of its orbit. This tilt is responsible for the changing seasons throughout the year.
(b) How long does the earth take to complete one revolution around the sun?
Ans: Earth takes 365 days to complete one revolution around the Sun.
(c) What is circle of illumination?
Ans: An imaginary circle divides the earth between the occurrence of day and night. This circle is called illumination circle.
(d) On which dates of the year sun rays fall vertically on the equator?
Ans: On March 21st and September 23rd, direct rays of the Sun fall on the Equator.
2. Answer the following:
(a) What do you mean by rotation and revolution?
Ans: The stars and the planets of the solar system attract each other and the planets have motion due to this attraction. As a planet, the earth is also moving. The motion is of two types, In one motion the earth spins on its own axis and with the other motion it also moves around the sun. Thus, the former motion of the earth on its axis is called rotation and the latter movement around the sun is called revolution.
(b) How do the days and nights occur due to rotation?
Ans: The rotation of the earth causes day and night. The sun, the moon, the stars seem to move from east to west because the earth spins from east to west.The part of the earth which faces the sun experiences the daytime whereas the part away from the sun gets no sunlight and hence the night. The axis of the earth’s rotation is tilted at 23.5 degrees.
(c) What is a Leap Year?
Ans: A leap year is a year with an extra day. The additional day is added to the month of February in that year. Thus February has 29 days and that year has 366 days. Such a year is called a Leap Year.
(d) Differentiate between the summer and winter solstices.
Ans: The summer solstice, the longest day of the year, occurs when the Sun is at its highest point in the sky. and the winter solstice occurs when the sun is at its lowest point in the sky.
(e) What may happen had there been no revolution of earth?
Ans: If Earth did not rotate on its axis, one side would constantly face the Sun and become extremely hot, while the other would remain in darkness and become very cold. This would make life unsustainable.
.
(f) What do you mean by the earth’s orbit. Explain with the help of a diagram
Ans: The earth while rotating on its axis also revolves around the sun. This motion of the earth is called revolution. The earth revolves around the sun from west to east along an elliptical orbit. The earth takes 365 days and almost 6 hours (i.e. about 365 1/2 days) to complete one revolution around the sun. The time taken by the earth to go round the sun once is called a year. Thus revolution is also called the annual motion of the earth.
3. Tick () to correct answer:
(a) Name the motion of the earth that revolves around the sun.
(i) Rotation.
(ii) Axis.
(iii) Revolution.
Ans: (iii) Revolution.
(b) On which date sun rays fall vertically on equator
(i) 21 March.
(ii) 21 June.
(iii) 22 December.
Ans: (i) 21 March.
(c) Change of season occurs on the earth due to
(i) Revolution.
(ii) Rotation.
(iii) None of these.
Ans: (i) Revolution .
(d) In a Leap Year total no of days is-
(i) 365 days.
(ii) 366 days.
(iii) 3651/2 days.
Ans: (ii) 366 days.
(e) Winter solstices occur on
(i) 23 September.
(ii) 21 March.
(iii) 22 Decembar.
Ans: (iii) 22 Decembar.
4. Fill up the blanks:
(a) The rotation of the earth on its axis from west to east is called_______
Ans: Rotation.
(b) The path along which the earth moves around the sun is called________.
Ans: Orbit.
(c) The shortest day occur during _________ season.
Ans: Winter.
(d) The imaginary line joining the north pole with the south pole is called___________.
Ans: Axis.
(e) The Winter Solstices circle has been imagined in ______ hemisphere.
Ans: Southern.
(f) The earth is inclined on its axis at an angle of ______ degree.
Ans: 23.5
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