Class 9 Science - Exploration: Entering the World of Secondary Science - Hypothesis and experimentation Expert Quiz

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किसी परिकल्पना को बचाने के लिए प्रयोग के बाद उसके अर्थ को बदल दिया गया। वैज्ञानिक दृष्टि से यह क्यों समस्याग्रस्त है?

The meaning of a hypothesis was changed after the experiment to protect it. Why is this scientifically problematic?

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Correct Answer

B. यह परीक्षण को परिणाम के बाद बदल देता हैIt changes the test after seeing the outcome

Step 1

Concept

Changing a claim after seeing the result weakens testability and transparency. Look for predefined claims.

Step 2

Why this answer is correct

The correct answer is B. यह परीक्षण को परिणाम के बाद बदल देता है / It changes the test after seeing the outcome. Changing a claim after seeing the result weakens testability and transparency. Look for predefined claims.

Step 3

Exam Tip

परिणाम देखकर दावे का अर्थ बदलना परीक्षणीयता और पारदर्शिता को कमजोर करता है। परीक्षा में पूर्व निर्धारित दावे पहचानें।

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एक अध्ययन में परिणाम बहुत परिशुद्ध हैं लेकिन परिकल्पना से असंबंधित चर मापा गया। निष्कर्ष कैसा होगा?

A study produces highly precise results but measures a variable unrelated to the hypothesis. How should the conclusion be judged?

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Correct Answer

B. मापन वैधता कमजोरWeak in measurement validity

Step 1

Concept

Precisely measuring the wrong variable does not properly test a hypothesis. Distinguish precision from validity.

Step 2

Why this answer is correct

The correct answer is B. मापन वैधता कमजोर / Weak in measurement validity. Precisely measuring the wrong variable does not properly test a hypothesis. Distinguish precision from validity.

Step 3

Exam Tip

गलत चर को परिशुद्धता से मापना भी उचित परिकल्पना परीक्षण नहीं है। परीक्षा में परिशुद्धता और वैधता अलग रखें।

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किसी वैज्ञानिक विचार में रचनात्मक कल्पना की भूमिका क्या है?

What is the role of creative imagination in a scientific idea?

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Correct Answer

A. नई परिकल्पना और मॉडल बनाना लेकिन उन्हें प्रमाण से जाँचनाCreating new hypotheses and models while testing them with evidence

Step 1

Concept

Imagination generates scientific ideas while evidence evaluates them. Recognise both creativity and testing.

Step 2

Why this answer is correct

The correct answer is A. नई परिकल्पना और मॉडल बनाना लेकिन उन्हें प्रमाण से जाँचना / Creating new hypotheses and models while testing them with evidence. Imagination generates scientific ideas while evidence evaluates them. Recognise both creativity and testing.

Step 3

Exam Tip

कल्पना वैज्ञानिक विचार उत्पन्न करती है लेकिन प्रमाण उनका मूल्यांकन करता है। परीक्षा में रचनात्मकता और परीक्षण दोनों देखें।

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