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Keeping Time with the Skies — Flashcards

CBSE · Class 8 · Science

76 flashcards for Keeping Time with the Skies (CBSE Class 8 Science) to test yourself on key terms and facts. Part of the CBSE Class 8 Science syllabus.

44 questions76 flashcards3 formulas & key relations5 concepts

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76 Flashcards·
Phases of the Moonचंद्रमा की कलाएँCommon misconceptionआम गलतफहमीMoon phasesचंद्र कलाएँ
Card 1Phases of the Moon

Why does the Moon sometimes look like a crescent and sometimes like a full circle?

Answer

The Moon does not change its shape. It shines by reflecting sunlight, and from Earth only the illuminated part facing us can be seen. As the Moon revolves around Earth, the visible bright part changes…

Card 2चंद्रमा की कलाएँ

चंद्रमा कभी अर्धचंद्र जैसा और कभी पूर्ण वृत्त जैसा क्यों दिखता है?

Answer

चंद्रमा का आकार नहीं बदलता है। यह सूर्य के प्रकाश को परावर्तित करके चमकता है और पृथ्वी से केवल हमारा सामने वाला प्रकाशित भाग ही दिखाई देता है। पृथ्वी के चारों ओर घूमते हुए चंद्रमा का दृश्यमान चमकीला भ…

Card 3Phases of the Moon

What causes the phases of the Moon?

Answer

Phases happen because the Moon revolves around Earth and we see different parts of its sunlit half. The changing view of the illuminated portion creates crescent, half, gibbous, full Moon, and new Moo…

Card 4चंद्रमा की कलाएँ

चंद्रमा की कलाओं का क्या कारण है?

Answer

चंद्रमा के पृथ्वी के चारों ओर घूमने के कारण चरण होते हैं और हम इसके सूर्य के प्रकाश वाले आधे हिस्से के विभिन्न भागों को देखते हैं। प्रकाशित भाग के बदलते दृश्य से अर्धचंद्र, आधा, गुंबददार, पूर्ण चंद्रम…

Card 5Common misconception

Why are Moon phases not caused by Earth's shadow?

Answer

That idea is incorrect. Earth's shadow causes a lunar eclipse, not Moon phases. Moon phases happen because of the changing relative positions of the Sun, Earth, and Moon.

Card 6आम गलतफहमी

चंद्रमा के चरण पृथ्वी की छाया के कारण क्यों नहीं होते हैं?

Answer

यह विचार गलत है। पृथ्वी की छाया चंद्र ग्रहण का कारण बनती है, न कि चंद्रमा की कला। चंद्रमा की कला सूर्य, पृथ्वी और चंद्रमा की सापेक्ष स्थिति में परिवर्तन के कारण होती है।…

Card 7Moon phases

What is a full Moon day called, and what is a new Moon day called?

Answer

A full Moon day is called Purnima, when the Moon appears as a full bright circle. A new Moon day is called Amavasya, when the illuminated part is not visible from Earth.

Card 8चंद्र कलाएँ

पूर्णिमा को क्या कहते हैं और अमावस्या को क्या कहते हैं?

Answer

पूर्णिमा पूर्णिमा को कहा जाता है, जब चंद्रमा एक पूर्ण उज्ज्वल वृत्त के रूप में दिखाई देता है। अमावस्या अमावस्या को कहा जाता है, जब प्रकाशित भाग पृथ्वी से दिखाई नहीं देता है।…

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Frequently Asked Questions

What are the important topics in Keeping Time with the Skies for CBSE Class 8 Science?
Key topics in Keeping Time with the Skies include Moon Phases and Their Causes, Day, Month, and Year, Types of Calendars, Festivals and Astronomical Phenomena. Study these first, then practise questions on each for Class 8 exams.
How many flashcards are available for Keeping Time with the Skies?
There are 76 flashcards for Keeping Time with the Skies covering key definitions, facts and ideas. A few sample cards are shown on this page.
How should I revise Keeping Time with the Skies for Class 8 exams?
Learn the core ideas first, then work through the 44 practice questions on Keeping Time with the Skies. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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