Class 6 Social Science (CTET Paper 2)Critical (2–3 MCQs guaranteed)8 min read
Chapter 1: The Earth in the Solar System
सौरमंडल में पृथ्वी (ग्रह, उपग्रह, क्षुद्रग्रह एवं उल्कापिंड)
CTET Theme: Astronomy, Planetary Science & The Cosmos
CTET Medium / परीक्षा माध्यम:Toggle authentic CBSE terminology
CTET On-the-Go Audio NotesHands-Free Revision
Listen to high-yield NCERT facts & CBSE traps without staring at the screen
OVERVIEW1 of 9
Introduction: The Earth in the Solar System
Welcome to Mentora CTET Audio Masterclass for Class 6 Social Science (CTET Paper 2), Chapter 1: The Earth in the Solar System. Here are the high-yield facts tested in CBSE examinations.
Aspirant Revision Toolkit:Offline cheatsheet, OMR practice & peer sharing
Offline Pen-and-Paper Exam Readiness
Don't Let a 20-Minute Bubbling Delay Cost You CTET Qualification
In offline CTET exams, bubbling 150 bubbles takes 18 to 22 minutes of mechanical time. A single misaligned row can trigger an 8-question domino error. Practice bubble-filling this chapter's solved MCQs inside Mentora's official OMR simulator.
150-Question CBSE Specimen Grid
Real-time Row-Shift Detection
Printable Official A4 Specimen
High-Weightage NCERT Facts & Key Terms (द्विभाषी)
5 Core Points- Planetary Hierarchy: 8 planets in order of distance from Sun: Mercury, Venus ('Earth's Twin' due to similar size and shape), Earth (3rd nearest, 'Blue Planet' due to 2/3 water surface, unique life support), Mars, Jupiter (largest), Saturn (prominent rings), Uranus, Neptune.
- The Asteroid Belt (क्षुद्रग्रह पेटी): A ring of rocky planetary fragments orbiting between the orbits of **Mars and Jupiter**.
- Moon's Synchronous Rotation: The Moon takes approximately **27 days** to complete one orbit around Earth and exactly the same time (27 days) to complete one rotation on its axis. As a consequence, **only one side of the Moon is ever visible from Earth**.
- First Human on the Moon: **Neil Armstrong** was the first human to step onto the surface of the Moon on **20 July 1969**.
- Pole Star (ध्रुवतारा): Indicates the North direction; remains in a fixed position in the sky; located using the pointer stars of the Saptarishi constellation (Ursa Major).
CBSE Distractor Traps (Avoid Negative Marking)
- Trap: Between which two planets is the Asteroid Belt located? Correct: **Mars and Jupiter (मंगल और बृहस्पति)**.
- Trap: Why do we only ever see one side of the Moon? Correct: Because **the Moon's orbital period around Earth equals its axial rotational period (~27 days)**.
- Trap: Which planet is called 'Earth's Twin'? Correct: **Venus (शुक्र)**.
NCERT Core Facts: Celestial Bodies, Orbital Mechanics & Planetary Orbits
In CTET Paper 2 Social Studies, Class 6 Geography Chapter 1 is an omnipresent foundation:
1. The Solar System Matrix
| Planet | Position from Sun | Unique Characteristic Highlighted in NCERT |
|---|---|---|
| Mercury (बुध) | 1st | Smallest planet; takes only 88 days to complete one orbit. |
| Venus (शुक्र) | 2nd | Earth's Twin (पृथ्वी का जुड़वां ग्रह) because its size and shape resemble Earth. |
| Earth (पृथ्वी) | 3rd | Blue Planet (नीला ग्रह); geoid shape (flattened at poles); atmosphere has life-supporting O_2. |
| Mars (मंगल) | 4th | Red planet; outer boundary of terrestrial inner rocky planets. |
| Jupiter (बृहस्पति) | 5th | Largest planet; massive gravitational attractor. |
| Saturn (शनि) | 6th | Ring system formed of billions of ice, dust, and rock particles. |
2. The Asteroid Belt & Meteoroids
- Asteroids (क्षुद्रग्रह): Tiny rocky bodies orbiting the Sun between the orbits of Mars and Jupiter. Scientists consider them pieces of an ancient planet that exploded long ago.
- Meteoroids (उल्कापिंड): Small chunks of rock that occasionally enter Earth's atmosphere; atmospheric friction causes them to heat up and glow as shooting stars.
3. The Moon: Orbital Synchronization
- Diameter: Only one-quarter of the Earth.
- Distance from Earth: ≈ 3,84,400\text{ km}.
- The 27-Day Rule: The moon completes both an orbit around Earth and one axial spin in 27 days. Hence, human observers on Earth never see the lunar far side directly.
Official CTET Benchmark Test
Test Your Mastery: The Earth in the Solar System
Authentic CBSE exam questions tested directly from this NCERT chapter.
Question 1 of 2(CTET 2021 & 2023)
Between the orbits of which two planets in our solar system is the Asteroid Belt located?
हमारे सौरमंडल में क्षुद्रग्रहों की पेटी (Asteroid Belt) किन दो ग्रहों की कक्षाओं के बीच पाई जाती है?
Question 2 of 2(CTET Jan 2022 & Aug 2023)
Why is only one face of the Moon always visible to an observer on Earth?
पृथ्वी से हमें चंद्रमा का केवल एक ही भाग सदैव क्यों दिखाई देता है?
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Open Full OMR SimulatorFrequently Asked Questions (CTET Pedagogy)
Between the orbits of which two planets is the Asteroid Belt situated?
Between Mars and Jupiter.
Why is Venus officially considered 'Earth's Twin' in NCERT Geography?
Because its physical size, mass, and shape are remarkably similar to Earth.