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Chapter 11 of 13
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Keeping Time with the Skies

CBSE · Class 8 · Science

Flashcards for Keeping Time with the Skies — CBSE Class 8 Science. Quick Q&A cards covering key concepts, definitions, and formulas.

44 questions76 flashcards5 concepts

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76 Flashcards
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?
Keeping Time with the Skies covers several key topics that are frequently asked in CBSE Class 8 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Keeping Time with the Skies — CBSE Class 8 Science?
Understand the core concepts first, then work through the 44 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many flashcards are available for Keeping Time with the Skies?
There are 76 flashcards for Keeping Time with the Skies covering key definitions, formulas, and concepts. Use them daily for 10–15 minutes for best results.

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