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Science Nature and meaning of science MCQ Questions for Class 9

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निम्न में से कौन वैज्ञानिक दृष्टिकोण दर्शाता है?

Which of the following shows a scientific attitude?

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Correct Answer

C. प्रश्न पूछना और प्रमाण खोजनाAsking questions and seeking evidence

Step 1

Concept

A scientific attitude involves asking questions and seeking evidence. Curiosity is a key feature.

Step 2

Why this answer is correct

The correct answer is C. प्रश्न पूछना और प्रमाण खोजना / Asking questions and seeking evidence. A scientific attitude involves asking questions and seeking evidence. Curiosity is a key feature.

Step 3

Exam Tip

वैज्ञानिक दृष्टिकोण में प्रश्न पूछना और प्रमाण खोजना शामिल है। जिज्ञासा इसकी प्रमुख विशेषता है।

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वैज्ञानिक ज्ञान की कौन सी विशेषता सही है?

Which feature of scientific knowledge is correct?

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Correct Answer

D. नए प्रमाण मिलने पर इसमें सुधार हो सकता हैIt can be revised when new evidence appears

Step 1

Concept

Scientific knowledge can be revised when new evidence appears. Consider science as revisable knowledge.

Step 2

Why this answer is correct

The correct answer is D. नए प्रमाण मिलने पर इसमें सुधार हो सकता है / It can be revised when new evidence appears. Scientific knowledge can be revised when new evidence appears. Consider science as revisable knowledge.

Step 3

Exam Tip

नए प्रमाण मिलने पर वैज्ञानिक ज्ञान में संशोधन हो सकता है। विज्ञान को परिवर्तनशील ज्ञान मानें।

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विज्ञान में जिज्ञासा का क्या लाभ है?

What is the benefit of curiosity in science?

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Correct Answer

A. यह नए प्रश्न पूछने के लिए प्रेरित करती हैIt encourages asking new questions

Step 1

Concept

Curiosity initiates new questions and discoveries. Being curious is important for scientific thinking.

Step 2

Why this answer is correct

The correct answer is A. यह नए प्रश्न पूछने के लिए प्रेरित करती है / It encourages asking new questions. Curiosity initiates new questions and discoveries. Being curious is important for scientific thinking.

Step 3

Exam Tip

जिज्ञासा नए प्रश्नों और खोजों की शुरुआत करती है। वैज्ञानिक सोच के लिए जिज्ञासु होना आवश्यक है।

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विज्ञान और अंधविश्वास में मुख्य अंतर क्या है?

What is the main difference between science and superstition?

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Correct Answer

B. विज्ञान प्रमाण और जांच पर आधारित होता हैScience is based on evidence and testing

Step 1

Concept

Science values evidence and testing while superstition is often accepted without evidence. Remember this distinction.

Step 2

Why this answer is correct

The correct answer is B. विज्ञान प्रमाण और जांच पर आधारित होता है / Science is based on evidence and testing. Science values evidence and testing while superstition is often accepted without evidence. Remember this distinction.

Step 3

Exam Tip

विज्ञान प्रमाण और जांच को महत्व देता है जबकि अंधविश्वास प्रायः बिना प्रमाण स्वीकार किया जाता है। यह अंतर याद रखें।

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किसी प्रयोग को दोहराने का एक प्रमुख उद्देश्य क्या है?

What is a major purpose of repeating an experiment?

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Correct Answer

C. परिणाम की विश्वसनीयता जांचनाChecking the reliability of the result

Step 1

Concept

Repeating an experiment shows whether similar results are obtained consistently. Repetition increases reliability.

Step 2

Why this answer is correct

The correct answer is C. परिणाम की विश्वसनीयता जांचना / Checking the reliability of the result. Repeating an experiment shows whether similar results are obtained consistently. Repetition increases reliability.

Step 3

Exam Tip

प्रयोग दोहराने से पता चलता है कि परिणाम लगातार मिल रहे हैं या नहीं। दोहराव विश्वसनीयता बढ़ाता है।

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विज्ञान में मापन क्यों किया जाता है?

Why is measurement used in science?

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Correct Answer

D. सटीक और तुलना योग्य जानकारी प्राप्त करने के लिएTo obtain precise and comparable information

Step 1

Concept

Measurement makes information precise and comparable. It is important in quantitative observations.

Step 2

Why this answer is correct

The correct answer is D. सटीक और तुलना योग्य जानकारी प्राप्त करने के लिए / To obtain precise and comparable information. Measurement makes information precise and comparable. It is important in quantitative observations.

Step 3

Exam Tip

मापन से जानकारी सटीक और तुलना योग्य बनती है। मात्रात्मक अवलोकन में मापन महत्वपूर्ण है।

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निम्न में से कौन गुणात्मक अवलोकन है?

Which of the following is a qualitative observation?

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Correct Answer

A. फूल लाल रंग का हैThe flower is red

Step 1

Concept

Describing colour is a qualitative observation because it does not use a number. Qualitative observations describe qualities.

Step 2

Why this answer is correct

The correct answer is A. फूल लाल रंग का है / The flower is red. Describing colour is a qualitative observation because it does not use a number. Qualitative observations describe qualities.

Step 3

Exam Tip

रंग का वर्णन गुणात्मक अवलोकन है क्योंकि इसमें संख्या नहीं होती। गुणात्मक में गुण बताए जाते हैं।

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निम्न में से कौन मात्रात्मक अवलोकन है?

Which of the following is a quantitative observation?

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B. पौधे की ऊंचाई बीस सेंटीमीटर हैThe plant is twenty centimetres tall

Step 1

Concept

An observation with a number and unit is quantitative. Measuring height is an example.

Step 2

Why this answer is correct

The correct answer is B. पौधे की ऊंचाई बीस सेंटीमीटर है / The plant is twenty centimetres tall. An observation with a number and unit is quantitative. Measuring height is an example.

Step 3

Exam Tip

संख्या और इकाई वाला अवलोकन मात्रात्मक होता है। ऊंचाई का मापन इसका उदाहरण है।

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वैज्ञानिक प्रयोग में चर किसे कहते हैं?

What is called a variable in a scientific experiment?

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Correct Answer

C. वह कारक जो बदल सकता हैA factor that can change

Step 1

Concept

A variable is a factor that can change or be measured in an experiment. Variable means a changing factor.

Step 2

Why this answer is correct

The correct answer is C. वह कारक जो बदल सकता है / A factor that can change. A variable is a factor that can change or be measured in an experiment. Variable means a changing factor.

Step 3

Exam Tip

चर वह कारक है जो प्रयोग में बदल सकता है या मापा जा सकता है। चर का अर्थ बदलने वाला कारक है।

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निष्पक्ष परीक्षण में किन कारकों को समान रखा जाता है?

In a fair test which factors are kept the same?

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Correct Answer

D. वे कारक जिन्हें बदला नहीं जा रहाFactors that are not being changed

Step 1

Concept

In a fair test conditions other than the tested factor are kept the same. This makes comparison valid.

Step 2

Why this answer is correct

The correct answer is D. वे कारक जिन्हें बदला नहीं जा रहा / Factors that are not being changed. In a fair test conditions other than the tested factor are kept the same. This makes comparison valid.

Step 3

Exam Tip

निष्पक्ष परीक्षण में जांचे जा रहे कारक के अलावा अन्य स्थितियां समान रखी जाती हैं। इससे तुलना उचित होती है।

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