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Science Nature and meaning of science MCQ Questions for Class 9

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विज्ञान में प्रमाण आधारित निर्णय का उदाहरण कौन सा है?

Which is an example of an evidence-based decision in science?

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Correct Answer

A. कई परीक्षणों के परिणाम देखकर पदार्थ चुननाChoosing a material after examining results from several tests

Step 1

Concept

An evidence-based decision depends on tests and data. Do not treat advertisements or preferences as scientific evidence.

Step 2

Why this answer is correct

The correct answer is A. कई परीक्षणों के परिणाम देखकर पदार्थ चुनना / Choosing a material after examining results from several tests. An evidence-based decision depends on tests and data. Do not treat advertisements or preferences as scientific evidence.

Step 3

Exam Tip

प्रमाण आधारित निर्णय परीक्षण और आंकड़ों पर निर्भर करता है। विज्ञापन या पसंद को वैज्ञानिक प्रमाण न मानें।

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एक वैज्ञानिक नियम सामान्यतः क्या बताता है?

What does a scientific law generally describe?

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Correct Answer

B. प्रकृति में बार-बार देखे गए संबंध या पैटर्नA repeatedly observed relationship or pattern in nature

Step 1

Concept

A scientific law describes a consistently observed relationship in nature. A law is different from personal opinion.

Step 2

Why this answer is correct

The correct answer is B. प्रकृति में बार-बार देखे गए संबंध या पैटर्न / A repeatedly observed relationship or pattern in nature. A scientific law describes a consistently observed relationship in nature. A law is different from personal opinion.

Step 3

Exam Tip

वैज्ञानिक नियम प्रकृति में लगातार देखे गए संबंध का वर्णन करता है। नियम और व्यक्तिगत राय अलग होते हैं।

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वैज्ञानिक सिद्धांत का मुख्य कार्य क्या होता है?

What is the main function of a scientific theory?

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C. बहुत से प्रमाणों के आधार पर घटनाओं की व्याख्या करनाTo explain phenomena using a large body of evidence

Step 1

Concept

A scientific theory explains phenomena using a broad body of evidence. Do not confuse it with an ordinary guess.

Step 2

Why this answer is correct

The correct answer is C. बहुत से प्रमाणों के आधार पर घटनाओं की व्याख्या करना / To explain phenomena using a large body of evidence. A scientific theory explains phenomena using a broad body of evidence. Do not confuse it with an ordinary guess.

Step 3

Exam Tip

वैज्ञानिक सिद्धांत व्यापक प्रमाणों के आधार पर घटनाओं की व्याख्या करता है। इसे सामान्य अनुमान न समझें।

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क्या वैज्ञानिक सिद्धांत नए प्रमाण मिलने पर बदला जा सकता है?

Can a scientific theory be modified when new evidence is found?

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Correct Answer

D. हां यदि नए प्रमाण सुधार की आवश्यकता दिखाएंYes if new evidence shows a need for revision

Step 1

Concept

A scientific theory can be revised on the basis of strong new evidence. Remember the revisable nature of science.

Step 2

Why this answer is correct

The correct answer is D. हां यदि नए प्रमाण सुधार की आवश्यकता दिखाएं / Yes if new evidence shows a need for revision. A scientific theory can be revised on the basis of strong new evidence. Remember the revisable nature of science.

Step 3

Exam Tip

वैज्ञानिक सिद्धांत नए मजबूत प्रमाणों के आधार पर सुधारा जा सकता है। विज्ञान की परिवर्तनशील प्रकृति याद रखें।

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वैज्ञानिक जांच में सीमा का उल्लेख क्यों किया जाता है?

Why are limitations mentioned in a scientific investigation?

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A. ताकि पता चले परिणाम कहां तक लागू हो सकते हैंTo show how far the results may apply

Step 1

Concept

Limitations show the conditions within which an investigation is reliable. They are part of honest scientific reporting.

Step 2

Why this answer is correct

The correct answer is A. ताकि पता चले परिणाम कहां तक लागू हो सकते हैं / To show how far the results may apply. Limitations show the conditions within which an investigation is reliable. They are part of honest scientific reporting.

Step 3

Exam Tip

सीमाएं बताती हैं कि जांच किन परिस्थितियों तक विश्वसनीय है। यह ईमानदार वैज्ञानिक रिपोर्ट का भाग है।

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विज्ञान में नैतिकता का क्या महत्व है?

What is the importance of ethics in science?

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B. यह लोगों जीवों और पर्यावरण के प्रति जिम्मेदार व्यवहार सिखाती हैIt promotes responsible behaviour toward people living beings and the environment

Step 1

Concept

Scientific ethics emphasises safe and responsible work. Unnecessary harm to living beings and the environment should be avoided.

Step 2

Why this answer is correct

The correct answer is B. यह लोगों जीवों और पर्यावरण के प्रति जिम्मेदार व्यवहार सिखाती है / It promotes responsible behaviour toward people living beings and the environment. Scientific ethics emphasises safe and responsible work. Unnecessary harm to living beings and the environment should be avoided.

Step 3

Exam Tip

वैज्ञानिक नैतिकता सुरक्षित और जिम्मेदार कार्य पर जोर देती है। जीवों और पर्यावरण को अनावश्यक हानि से बचाना चाहिए।

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किसी प्रयोग में पर्यावरण का ध्यान रखना किस वैज्ञानिक मूल्य को दर्शाता है?

Which scientific value is shown by considering the environment during an experiment?

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Correct Answer

C. जिम्मेदारीResponsibility

Step 1

Concept

Protecting the environment is part of scientific responsibility. Dispose of experimental waste properly.

Step 2

Why this answer is correct

The correct answer is C. जिम्मेदारी / Responsibility. Protecting the environment is part of scientific responsibility. Dispose of experimental waste properly.

Step 3

Exam Tip

पर्यावरण की सुरक्षा वैज्ञानिक जिम्मेदारी का भाग है। प्रयोग के अपशिष्ट का उचित निपटान करें।

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वैज्ञानिक जांच के बाद नया प्रश्न उत्पन्न होना क्या दर्शाता है?

What does the emergence of a new question after an investigation show?

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Correct Answer

D. वैज्ञानिक खोज एक निरंतर प्रक्रिया हैScientific inquiry is a continuous process

Step 1

Concept

The result of one investigation can lead to new questions. Science is a continuous process of inquiry and improvement.

Step 2

Why this answer is correct

The correct answer is D. वैज्ञानिक खोज एक निरंतर प्रक्रिया है / Scientific inquiry is a continuous process. The result of one investigation can lead to new questions. Science is a continuous process of inquiry and improvement.

Step 3

Exam Tip

एक जांच का परिणाम नए प्रश्नों को जन्म दे सकता है। विज्ञान निरंतर खोज और सुधार की प्रक्रिया है।

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विज्ञान सीखने का सर्वोत्तम तरीका कौन सा है?

Which is the best way to learn science?

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Correct Answer

A. प्रश्न पूछना प्रयोग करना और प्रमाण समझनाAsking questions conducting experiments and understanding evidence

Step 1

Concept

Science is learned better through active investigation and understanding evidence. Memorisation alone is not enough.

Step 2

Why this answer is correct

The correct answer is A. प्रश्न पूछना प्रयोग करना और प्रमाण समझना / Asking questions conducting experiments and understanding evidence. Science is learned better through active investigation and understanding evidence. Memorisation alone is not enough.

Step 3

Exam Tip

विज्ञान सक्रिय जांच और प्रमाणों की समझ से बेहतर सीखा जाता है। केवल रटना पर्याप्त नहीं है।

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विज्ञान के अर्थ को सबसे अच्छी तरह कौन सा कथन व्यक्त करता है?

Which statement best expresses the meaning of science?

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B. विज्ञान प्रमाणों से प्राकृतिक संसार को समझने की व्यवस्थित प्रक्रिया हैScience is a systematic process of understanding the natural world through evidence

Step 1

Concept

Science understands the natural world through evidence and systematic investigation. In meaning-based questions identify both process and evidence.

Step 2

Why this answer is correct

The correct answer is B. विज्ञान प्रमाणों से प्राकृतिक संसार को समझने की व्यवस्थित प्रक्रिया है / Science is a systematic process of understanding the natural world through evidence. Science understands the natural world through evidence and systematic investigation. In meaning-based questions identify both process and evidence.

Step 3

Exam Tip

विज्ञान प्राकृतिक संसार को प्रमाण और व्यवस्थित जांच से समझता है। अर्थ संबंधी प्रश्न में प्रक्रिया और प्रमाण दोनों पहचानें।

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