Class 7 Science — Chapter 12: Earth, Moon, and the Sun
Chapter 12: Earth, Moon, and the Sun is a chapter in Class 7 Science (Curiosity), part of the CBSE NCERT curriculum followed by over 25 million students across India. This chapter covers 6 topics including Apparent Motion of the Sun, Earth's Rotation, Direction and Period of Rotation. BrainWeave provides free AI-powered explanations — by voice or text, in Hindi or English — with no signup required.
What you'll learn
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▸Apparent Motion of the SunCore conceptapparent motionrises in the Eastsets in the WestSun's path
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▸Earth's RotationCore conceptrotationaxis of rotationspinNorth PoleSouth Pole
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▸Direction and Period of RotationCore conceptWest to Eastanti-clockwise24 hoursone day
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▸The Day and Night CycleCore conceptday and nightsunrisesunsetEarth's surface
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▸Apparent Motion of Starsstarsnight skyBig DipperPole Star
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▸Foucault's PendulumFoucault's pendulumevidencedemonstrationproof of rotation
Chapter Summary
Understand that the Sun's daily movement across the sky, rising in the East and setting in the West, is an apparent motion caused by the Earth's rotation, not the Sun actually moving around the Earth.
Learn that the Earth spins on an imaginary line called its axis of rotation, which passes through the geographic North and South Poles. This spinning motion is called rotation.
Identify the direction of Earth's rotation as West to East (anti-clockwise when viewed from above the North Pole) and know that it takes approximately 24 hours to complete one rotation.
Explain how the Earth's rotation causes the cycle of day and night. The half of the Earth facing the Sun experiences daylight, while the opposite half experiences night.
Recognize that, similar to the Sun, stars in the night sky also appear to move. This apparent motion is a direct consequence of the Earth's rotation.
Understand that Foucault's pendulum is a famous scientific experiment that provides simple, direct evidence of the Earth's rotation.
Practice Questions from this Chapter
Tap "Get Solution" on any question to ask our AI tutor.
- Explain Earth's spin simply. Get Solution →
- Show why the Sun moves. Get Solution →
- Quiz me on day and night. Get Solution →
- According to the text, how long does it take for the Earth to complete one rotation on its axis? Get Solution →
- What is the imaginary line passing through the Earth's geographic North and South Poles on which it spins? Get Solution →
- What is the primary cause of the day and night cycle on Earth? Get Solution →
- In which direction does the Sun appear to rise from our perspective on Earth? Get Solution →
- When viewed from above the North Pole, in which direction does the Earth rotate? Get Solution →
Did you know?
- 💡 The Earth spins at over 1,000 miles per hour at the equator.
- 💡 Sunrise and sunset colors happen because sunlight passes through more atmosphere.
- 💡 Some planets spin so slowly that a day can last longer than a year.
- 💡 Ancient Egyptians divided day and night into 12 hours each.
- 💡 Earth's rotation is gradually slowing down, making days longer.
Frequently Asked Questions
How many topics are covered in this chapter?
This chapter covers 6 key topics: Apparent Motion of the Sun, Earth's Rotation, Direction and Period of Rotation, The Day and Night Cycle, Apparent Motion of Stars, and more. The BrainWeave AI tutor explains each one with examples.
Is Chapter 12: Earth, Moon, and the Sun important for board exams?
Class 7 is a foundation year. Mastering this chapter now will help you build strong fundamentals for the higher classes.
Can I get NCERT solutions for this chapter in Hindi?
Yes. BrainWeave's AI tutor supports Hindi, English, and Hinglish for both voice and text chat. Just ask your question in your preferred language.
Is BrainWeave free for Class 7?
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Can I use voice chat for this chapter?
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How is BrainWeave better than static NCERT solutions sites?
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