Class 7 Exam > Class 7 Videos > Science (Curiosity) Class 7 - New NCERT > How the Movement of the Earth and Sun Cause the Days, Seasons and Years
How the Movement of the Earth and Sun Cause the Days, Seasons and Years Video Lecture | Science (Curiosity) Class 7 - New NCERT
FAQs on How the Movement of the Earth and Sun Cause the Days, Seasons and Years Video Lecture - Science (Curiosity) Class 7 - New NCERT
| 1. How does the tilt of the Earth's axis affect the seasons? |  |
Ans. The tilt of the Earth's axis is approximately 23.5 degrees. This tilt causes different parts of the Earth to receive varying amounts of sunlight throughout the year. When the Northern Hemisphere is tilted towards the Sun, it experiences summer, while the Southern Hemisphere, which is tilted away, experiences winter. Conversely, when the Southern Hemisphere is tilted towards the Sun, it experiences summer, and the Northern Hemisphere experiences winter. This variation in sunlight leads to the changing of seasons.
| 2. Why do we have different lengths of days and nights throughout the year? | |
Ans. The length of days and nights changes throughout the year due to the tilt of the Earth's axis and its orbit around the Sun. During summer in a particular hemisphere, the Sun rises earlier and sets later, resulting in longer days and shorter nights. In winter, the opposite occurs, with shorter days and longer nights. This variation in day length is more pronounced the further you are from the equator.
| 3. How long does it take for the Earth to complete one orbit around the Sun? | |
Ans. The Earth takes approximately 365.25 days to complete one full orbit around the Sun. This is why we have a leap year every four years, adding an extra day to the calendar (February 29) to account for that additional quarter of a day.
| 4. What causes the phenomenon of the seasons in different regions of the Earth? | |
Ans. The seasons are caused by the tilt of the Earth's axis and its revolution around the Sun. As the Earth orbits, different regions receive varying amounts of sunlight at different times of the year. This results in the warm temperatures of summer and the cold temperatures of winter, along with the transitional seasons of spring and autumn.
| 5. How do the movements of the Earth and Sun influence climate? | |
Ans. The movements of the Earth and Sun significantly influence climate by determining the amount of solar energy received at different locations. Areas that receive more direct sunlight, like the equator, tend to have warmer climates, while regions that receive less direct sunlight, like the poles, tend to be colder. These variations in temperature, along with other factors like wind patterns and ocean currents, contribute to the overall climate of different regions on Earth.
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