Imp Questions For All Chapters – Geography Class 7
How Seasons Occur – Part 2
Short Questions
1. What causes the occurrence of seasons?
Answer: Seasons occur due to the Earth’s revolution around the Sun and the tilt of its axis.
2. What is the duration of day and night on equinox?
Answer: On 21st March and 23rd September, day and night are equal (12 hours each) worldwide.
3. Which two solstice days occur in a year?
Answer: 21st June (Summer Solstice) and 22nd December (Winter Solstice).
4. What is the apparent movement of the Sun?
Answer: The Sun appears to move northward or southward due to the Earth’s revolution.
5. Why is there no seasonal variation at the equator?
Answer: The equator receives equal sunlight throughout the year, leading to a constant climate.
6. What is the Midnight Sun?
Answer: It is a phenomenon where the Sun remains visible for 24 hours in polar regions.
7. Why do birds like the Arctic Tern migrate?
Answer: They migrate to experience summer twice a year and find food.
8. When does the Northern Hemisphere experience winter?
Answer: From 22nd September to 21st March, during which the Southern Hemisphere has summer.
9. What is the Perihelion position of the Earth?
Answer: In early January, the Earth is at its closest distance to the Sun (Perihelion).
10. Why are penguins not found at the North Pole?
Answer: Penguins are native to the Southern Hemisphere, mainly Antarctica, and do not exist in the Arctic.
Long Questions
1. How do solstices affect the length of days and nights?
Answer: During the Summer Solstice (21st June), the Northern Hemisphere has the longest day and shortest night, while during the Winter Solstice (22nd December), it experiences the shortest day and longest night.
2. Why does the Southern Hemisphere experience opposite seasons to the Northern Hemisphere?
Answer: Since the Earth is tilted on its axis, when one hemisphere is tilted towards the Sun, it experiences summer, while the other hemisphere, tilted away, experiences winter.
3. What would happen if the Earth’s axis were not tilted?
Answer: If the Earth’s axis were not tilted, every region would experience the same climate year-round, and seasons would not exist.
4. What is the effect of Earth’s elliptical orbit on seasons?
Answer: The Earth’s elliptical orbit causes variations in its distance from the Sun, but the tilt of its axis is the main reason for seasonal changes.
5. How does the revolution of the Earth affect different seasons?
Answer: As the Earth revolves around the Sun, different parallels receive direct sunlight, leading to summer, winter, spring, and autumn in various regions.
6. Why does the Antarctic Circle have 24 hours of daylight in December?
Answer: In December, the Southern Hemisphere is tilted towards the Sun, causing regions near the Antarctic Circle to have continuous daylight.
7. What is the significance of equinoxes?
Answer: On 21st March and 23rd September, the Sun’s rays fall directly on the equator, creating equal day and night across the world.
8. How do different regions of the Earth experience different seasons?
Answer: Due to the Earth’s tilted axis, some regions receive more sunlight in certain months, causing seasonal variations throughout the year.
9. Why do Arctic and Antarctic animals have special adaptations?
Answer: Animals like polar bears and penguins have adapted to extreme cold and long winters, enabling them to survive in polar regions.
10. What is the relationship between agriculture and seasons?
Answer: Agriculture depends on seasonal variations, with crops growing in specific climatic conditions, such as summer for wheat and monsoon for rice.
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