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Test: Rotation and Revolution - Class 6 MCQ


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15 Questions MCQ Test - Test: Rotation and Revolution

Test: Rotation and Revolution for Class 6 2024 is part of Class 6 preparation. The Test: Rotation and Revolution questions and answers have been prepared according to the Class 6 exam syllabus.The Test: Rotation and Revolution MCQs are made for Class 6 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Rotation and Revolution below.
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Test: Rotation and Revolution - Question 1

What is the direction of the Earth's rotation on its axis?

Detailed Solution for Test: Rotation and Revolution - Question 1
The Earth rotates on its axis from west to east. This rotation causes the cycle of day and night as different parts of the Earth are alternately exposed to sunlight. Interestingly, this rotation is in a counter-clockwise direction when viewed from above the North Pole.
Test: Rotation and Revolution - Question 2

What is the angle of inclination of the Earth's axis away from a line perpendicular to the plane of its orbit around the Sun?

Detailed Solution for Test: Rotation and Revolution - Question 2
The Earth's axis is inclined at an angle of 23 degrees 20 minutes away from a line drawn perpendicular to the plane of its orbit around the Sun. This tilt is responsible for the changing seasons experienced on Earth as different parts receive varying amounts of sunlight throughout the year.
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Test: Rotation and Revolution - Question 3

What is the name of the circular line that separates night from day on Earth?

Detailed Solution for Test: Rotation and Revolution - Question 3
The correct answer is Option C: Circle of Illumination. This line is known as the circle of illumination, which is the boundary separating the illuminated half of the Earth from the dark half. It is the division that marks the transition between day and night on Earth.
Test: Rotation and Revolution - Question 4
What effect does the Earth's rotation have on the perception of the Sun's movement in the sky?
Detailed Solution for Test: Rotation and Revolution - Question 4
Due to the Earth's rotation from west to east, observers on Earth perceive the Sun's movement in the sky as rising in the east and setting in the west. This daily cycle of the Sun's apparent motion is a direct result of the Earth's rotation on its axis, causing the Sun to appear to move across the sky from east to west.
Test: Rotation and Revolution - Question 5
Why does the Earth always tilt in the same direction?
Detailed Solution for Test: Rotation and Revolution - Question 5
The Earth always tilts in the same direction due to the principle of conservation of angular momentum. This means that once the Earth's axis is tilted in a particular direction, it tends to remain that way unless acted upon by an external force. This consistent tilt is what leads to the predictable changes in seasons.
Test: Rotation and Revolution - Question 6
In which direction does the Sun appear to move across the sky due to Earth's rotation?
Detailed Solution for Test: Rotation and Revolution - Question 6
The correct answer is Option C: West to East. Due to the Earth's rotation from west to east, the Sun appears to rise in the east and set in the west. This movement of the Sun across the sky is a result of the Earth's rotation on its axis.
Test: Rotation and Revolution - Question 7
What is the term for the phenomenon when the part of the Earth receiving light from the Sun experiences day?
Detailed Solution for Test: Rotation and Revolution - Question 7
The correct answer is Option D: Solar Illumination. Solar illumination refers to the process where the part of the Earth receiving light from the Sun experiences daylight. This phenomenon occurs as the Earth rotates on its axis, causing different regions to be exposed to sunlight at different times.
Test: Rotation and Revolution - Question 8
What natural phenomenon is responsible for causing varying day and night lengths on Earth throughout the year?
Detailed Solution for Test: Rotation and Revolution - Question 8
The varying day and night lengths on Earth throughout the year are primarily caused by Earth's axial tilt and its position around the Sun. This tilt, combined with Earth's revolution around the Sun, results in different angles at which sunlight reaches different regions of the Earth, leading to the changing lengths of day and night. This phenomenon is essential for the occurrence of seasons on our planet.
Test: Rotation and Revolution - Question 9
Which astronomical events explain the changes in seasons on Earth?
Detailed Solution for Test: Rotation and Revolution - Question 9
The changes in seasons on Earth can be explained by two astronomical events called equinox and solstice. Equinox, meaning 'equal nights,' occurs twice a year when day and night are approximately of equal length. Solstice, meaning 'Sun standing still,' happens twice a year as well and marks the longest and shortest days of the year. These events are crucial in understanding the transitions between seasons.
Test: Rotation and Revolution - Question 10
What phenomenon occurs during the Summer Solstice?
Detailed Solution for Test: Rotation and Revolution - Question 10
During the Summer Solstice, the North Pole is tilted towards the Sun, and the Sun's rays fall directly on the Tropic of Cancer. This positioning of the Earth leads to summer in the Northern Hemisphere. The Summer Solstice marks the longest day in the Northern Hemisphere with longer days and shorter nights. This phenomenon results in regions between the Arctic Circle and the North Pole receiving sunlight 24 hours a day for a few months, as the Sun never sets. Conversely, during this time, it is winter in the Southern Hemisphere, where nights are longer than the days, and the region between the Antarctic Circle and the South Pole experiences darkness for a few months without seeing the Sun.
Test: Rotation and Revolution - Question 11
What is the primary reason for the opposite seasons experienced in the two hemispheres of Earth?
Detailed Solution for Test: Rotation and Revolution - Question 11
The primary reason for the opposite seasons experienced in the two hemispheres of Earth lies in Earth's axial tilt. As Earth orbits the Sun, the tilt of its axis causes different hemispheres to receive varying amounts of sunlight at different times of the year. This discrepancy in sunlight exposure leads to the opposite seasons experienced in the Northern and Southern Hemispheres, showcasing the significance of Earth's axial tilt in shaping global climate patterns.
Test: Rotation and Revolution - Question 12
Why are days and nights always of equal duration throughout the year only at the Equator?
Detailed Solution for Test: Rotation and Revolution - Question 12
Days and nights are always of equal duration throughout the year only at the Equator due to Earth's axial tilt. The Equator experiences this phenomenon because it is positioned perpendicular to the Earth's axis of rotation, resulting in the Sun being directly overhead at noon throughout the year. This alignment minimizes the variations in day length caused by the tilt of Earth's axis, leading to consistent day and night durations at the Equator.
Test: Rotation and Revolution - Question 13
What characterizes the Winter Solstice?
Detailed Solution for Test: Rotation and Revolution - Question 13
The Winter Solstice occurs when the Sun's rays fall vertically on the Tropic of Capricorn, with the South Pole tilted towards the Sun. This astronomical event signifies winter in the Northern Hemisphere, where the days are shorter and the nights are longer. During this period, regions between the Arctic Circle and the North Pole experience 24 hours of darkness for several months as the Sun remains unseen. Simultaneously, the Southern Hemisphere enjoys summer as the vertical rays of the Sun focus on the Tropic of Capricorn, resulting in longer days and shorter nights. Notably, 22 December is the longest day in the Southern Hemisphere during the Winter Solstice.
Test: Rotation and Revolution - Question 14
What distinguishes the length of days between the Northern and Southern Hemispheres during the Winter Solstice?
Detailed Solution for Test: Rotation and Revolution - Question 14
During the Winter Solstice, days are shorter in the Northern Hemisphere and longer in the Southern Hemisphere. This is a result of the South Pole being tilted towards the Sun during this period, causing the Southern Hemisphere to receive more direct sunlight and experience longer days. In contrast, the Northern Hemisphere receives less direct sunlight due to the tilt of the Earth away from the Sun, leading to shorter days and longer nights. This difference in daylight duration between the two hemispheres during the Winter Solstice is a key characteristic of this astronomical event.
Test: Rotation and Revolution - Question 15
What does the term 'Equinox' signify in Latin?
Detailed Solution for Test: Rotation and Revolution - Question 15
The term 'Equinox' originates from Latin and signifies 'equal nights'. This term is derived from the Latin words "aequus" meaning equal and "nox" meaning night. During an equinox, day and night are approximately equal in length all over the world. This phenomenon occurs twice a year, marking the onset of spring and autumn.
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