How Things Work
CBSE · Class 4 · EVS
Flashcards for How Things Work — CBSE Class 4 EVS. Quick Q&A cards covering key concepts, definitions, and formulas.
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What kinds of things can spin?
Answer
Some objects like coins and bangles can spin. An eraser does not spin properly. Spinning is seen in many things around us, such as ceiling fans and potter's wheels.
किन-किन चीज़ों को घुमाया जा सकता है?
Answer
कुछ वस्तुएं जैसे सिक्का, चूड़ी आदि घूम सकती हैं। रबर ठीक से नहीं घूमता। घूमना हमारे आस-पास की कई चीजों में देखा जाता है जैसे सीलिंग फैन, कुम्हार का चाक आदि।…
एक सिक्का एक रबर से बेहतर क्यों घूमता है?
Answer
एक सिक्का ठीक से घूम सकता है, लेकिन एक इरेज़र ठीक से नहीं घूमता है। कुछ वस्तुएँ इस तरह से आकार और संतुलित होती हैं कि वे अच्छी तरह से घूम सकें।…
Why does a coin spin better than an eraser?
Answer
A coin can spin properly, but an eraser does not spin properly. Some objects are shaped and balanced in a way that helps them spin well.
What happens when a spinner with a hole at the centre is spun?
Answer
It appears the same from all sides and remains upright while spinning. The position of the hole at the centre helps it spin properly.
जब एक छेद वाले स्पिनर को घुमाया जाता है तो क्या होता है?
Answer
यह चारों तरफ से एक जैसा दिखता है और घूमते समय सीधा रहता है। केंद्र में छेद की स्थिति इसे ठीक से घूमने में मदद करती है।…
जब स्पिनर में छेद केंद्र से दूर होता है तो क्या होता है?
Answer
स्पिनर उसी तरह से व्यवहार नहीं करता है जैसे कि केंद्र में छेद वाला। यह ठीक से स्पिन नहीं कर सकता है क्योंकि संतुलन समान नहीं है।…
What happens when the hole in a spinner is away from the centre?
Answer
The spinner does not behave the same way as the one with the hole at the centre. It may not spin properly because the balance is not the same.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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