🌟 Class 7 Science Curiosity – Chapter 12 Solutions
🌍 Earth, Moon and the Sun | Amresh Academy
✍️ 🔹 Very Short Answer Type Questions
What causes day and night on Earth?
👉 Answer:
🌍 Day and night are caused by the rotation of the Earth on its axis from west to east
What is the time taken by the Earth to complete one rotation?
👉 Answer:
⏱️ The Earth takes approximately 24 hours
What is the shape of Earth’s orbit around the Sun?
👉 Answer:
☀️ The Earth revolves around the Sun in a nearly circular orbit
What is a solar eclipse?
👉 Answer:
🌑 A solar eclipse occurs when the Moon comes between the Sun and Earth, blocking sunlight
What is the direction of the Earth’s rotation?
👉 Answer:
➡️ The Earth rotates from west to east
🧠 🔹 Short Answer Type Questions
Why does the Sun appear to move from east to west in the sky?
👉 Answer:
🌞 Because the Earth rotates from west to east
➡️ Sun appears to rise in east and set in west
What is meant by revolution of the Earth?
👉 Answer:
🔄 Revolution is the movement of Earth around the Sun
➡️ Takes 365 days and 6 hours
How does the Moon cause a solar eclipse?
👉 Answer:
🌑 Moon comes between Earth and Sun
➡️ Blocks sunlight and casts shadow on Earth
Why is it not safe to look at a solar eclipse directly?
👉 Answer:
⚠️ Direct viewing can damage eyes
➡️ Due to intense radiation
What is a lunar eclipse?
👉 Answer:
🌕 A lunar eclipse occurs when Earth comes between Sun and Moon
➡️ Shadow falls on Moon
📖 🔹 Descriptive Answer Type Questions
How does Earth’s rotation cause the cycle of day and night?
👉 Answer:
🌍 As Earth rotates:
- Half facing Sun → Day ☀️
Half away → Night 🌙
➡️ This cycle repeats every 24 hours
Explain how the tilt of the Earth leads to seasons.
👉 Answer:
🌍 Earth’s axis is tilted
➡️ Different parts receive different sunlight
➡️ Causes seasons: Summer, Winter, Spring, Autumn
Why do stars appear to move in the sky during the night?
👉 Answer:
⭐ Due to Earth’s rotation
➡️ Stars appear to move east → west
What is the apparent size and how does it relate to solar eclipses?
👉 Answer:
📏 Apparent size depends on distance + actual size
➡️ Moon appears same size as Sun
➡️ So it can cover the Sun during eclipse
Why do different stars appear in the sky at different times of the year?
👉 Answer:
🌌 Due to Earth’s revolution
➡️ We see different parts of space in different months
🚀 🔹 Exploring Questions
Why is the total solar eclipse visible only in a small area?
👉 Answer:
🌑 Moon’s shadow is small
➡️ Only limited region experiences total eclipse
What would happen if the Earth’s axis were not tilted?
👉 Answer:
❌ No seasons
➡️ Same climate all year
Why do the poles have six months of day and night?
👉 Answer:
🌍 Due to Earth’s tilt
➡️ Poles face Sun for 6 months (day)
➡️ Away for next 6 months (night)
Why can we safely view a lunar eclipse with the naked eye but not a solar eclipse?
👉 Answer:
🌕 Moon reflects light → safe
☀️ Sun rays → harmful for eyes
Why do places near the equator experience less seasonal variation?
👉 Answer:
🌍 Sun rays fall directly
➡️ Temperature remains almost constant
