B. क्योंकि नए प्रमाण मिलने पर इसमें संशोधन हो सकता है/Because it may be revised when new evidence appears
Step 1
Concept
Scientific knowledge is based on current evidence and may improve with new evidence. In exams understand tentative as open to revision.
Step 2
Why this answer is correct
The correct answer is B. क्योंकि नए प्रमाण मिलने पर इसमें संशोधन हो सकता है / Because it may be revised when new evidence appears. Scientific knowledge is based on current evidence and may improve with new evidence. In exams understand tentative as open to revision.
Step 3
Exam Tip
वैज्ञानिक ज्ञान वर्तमान प्रमाणों पर आधारित होता है और नए प्रमाण से सुधर सकता है। परीक्षा में अस्थायी का अर्थ परिवर्तन योग्य समझें।
A claim becomes more reliable through evidence and repeated similar results. Popularity is not scientific support.
Step 2
Why this answer is correct
The correct answer is C. प्रमाण और पुनरावृत्ति / Evidence and repetition. A claim becomes more reliable through evidence and repeated similar results. Popularity is not scientific support.
Step 3
Exam Tip
दावे की विश्वसनीयता प्रमाण और समान परिणामों की पुनरावृत्ति से बढ़ती है। लोकप्रियता वैज्ञानिक समर्थन नहीं है।
C. प्रश्न या समस्या पहचानना/Identifying a question or problem
Step 1
Concept
A scientific investigation begins by identifying a question or problem. Treat problem identification as the starting step in exams.
Step 2
Why this answer is correct
The correct answer is C. प्रश्न या समस्या पहचानना / Identifying a question or problem. A scientific investigation begins by identifying a question or problem. Treat problem identification as the starting step in exams.
Step 3
Exam Tip
वैज्ञानिक जाँच किसी प्रश्न या समस्या की पहचान से शुरू होती है। परीक्षा में समस्या पहचान को प्रारंभिक चरण मानें।
The independent variable is the factor changed by the investigator. Here the amount of light is changed.
Step 2
Why this answer is correct
The correct answer is D. प्रकाश की मात्रा / Amount of light. The independent variable is the factor changed by the investigator. Here the amount of light is changed.
Step 3
Exam Tip
स्वतंत्र चर वह कारक है जिसे जांचकर्ता बदलता है। यहां प्रकाश की मात्रा बदली जाती है।
A scientific claim becomes reliable through evidence and testing. Choose evidence-based answers in exams.
Step 2
Why this answer is correct
The correct answer is D. प्रमाण और परीक्षण / Evidence and testing. A scientific claim becomes reliable through evidence and testing. Choose evidence-based answers in exams.
Step 3
Exam Tip
वैज्ञानिक दावा प्रमाण और परीक्षण से विश्वसनीय बनता है। परीक्षा में प्रमाण आधारित उत्तर चुनें।
A. चीनी घुलने में लगा समय/Time taken for sugar to dissolve
Step 1
Concept
The dependent variable is the outcome being measured. Here the time taken to dissolve is measured.
Step 2
Why this answer is correct
The correct answer is A. चीनी घुलने में लगा समय / Time taken for sugar to dissolve. The dependent variable is the outcome being measured. Here the time taken to dissolve is measured.
Step 3
Exam Tip
आश्रित चर वह परिणाम है जिसे मापा जाता है। यहां घुलने में लगा समय मापा जा रहा है।
A. घटनाओं के बारे में तथ्य एकत्र करना/Collecting facts about phenomena
Step 1
Concept
Observation provides facts and information about a phenomenon. Link observation with data collection in exams.
Step 2
Why this answer is correct
The correct answer is A. घटनाओं के बारे में तथ्य एकत्र करना / Collecting facts about phenomena. Observation provides facts and information about a phenomenon. Link observation with data collection in exams.
Step 3
Exam Tip
अवलोकन से किसी घटना के बारे में तथ्य और जानकारी मिलती है। परीक्षा में अवलोकन को तथ्य संग्रह से जोड़ें।
B. अन्य प्रभावों को सीमित करना/To limit other influences
Step 1
Concept
Controlled variables keep other possible influences constant. This makes the effect of the changed factor clearer.
Step 2
Why this answer is correct
The correct answer is B. अन्य प्रभावों को सीमित करना / To limit other influences. Controlled variables keep other possible influences constant. This makes the effect of the changed factor clearer.
Step 3
Exam Tip
नियंत्रित चर अन्य संभावित प्रभावों को समान रखते हैं। इससे बदले गए कारक का प्रभाव स्पष्ट होता है।
B. क्योंकि नए प्रमाण और बेहतर तकनीक उपलब्ध हो सकती है/Because new evidence and better technology may become available
Step 1
Concept
New evidence or technology can improve earlier conclusions. Remember that scientific knowledge is open to revision.
Step 2
Why this answer is correct
The correct answer is B. क्योंकि नए प्रमाण और बेहतर तकनीक उपलब्ध हो सकती है / Because new evidence and better technology may become available. New evidence or technology can improve earlier conclusions. Remember that scientific knowledge is open to revision.
Step 3
Exam Tip
नए प्रमाण या तकनीक से पुराने निष्कर्ष सुधारे जा सकते हैं। परीक्षा में विज्ञान को संशोधनशील ज्ञान समझें।
C. अवलोकन प्रत्यक्ष जानकारी है और अनुमान उसकी संभावित व्याख्या/Observation is direct information and inference is its possible explanation
Step 1
Concept
An observation is directly seen or measured while an inference is an explanation drawn from it. Keep the two terms separate in exams.
Step 2
Why this answer is correct
The correct answer is C. अवलोकन प्रत्यक्ष जानकारी है और अनुमान उसकी संभावित व्याख्या / Observation is direct information and inference is its possible explanation. An observation is directly seen or measured while an inference is an explanation drawn from it. Keep the two terms separate in exams.
Step 3
Exam Tip
अवलोकन सीधे देखा या मापा जाता है जबकि अनुमान उससे निकाली गई व्याख्या है। परीक्षा में दोनों शब्द अलग रखें।
