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Science Scientific questions and observations MCQ Questions for Class 9

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Scientific questions and observations Practice Questions

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वैज्ञानिक अवलोकन का अर्थ क्या है?

What does scientific observation mean?

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Correct Answer

A. किसी घटना को ध्यान से देखनाCarefully noticing an event

Step 1

Concept

Carefully noticing an object or event is called scientific observation. In exams identify the observed fact.

Step 2

Why this answer is correct

The correct answer is A. किसी घटना को ध्यान से देखना / Carefully noticing an event. Carefully noticing an object or event is called scientific observation. In exams identify the observed fact.

Step 3

Exam Tip

किसी वस्तु या घटना को ध्यान से देखना वैज्ञानिक अवलोकन कहलाता है। परीक्षा में देखे गए तथ्य को पहचानें।

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वैज्ञानिक प्रश्न कैसा होना चाहिए?

What should a scientific question be like?

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Correct Answer

B. जाँच योग्यTestable

Step 1

Concept

A scientific question should be testable through observation or experiment. In exams choose the testable question.

Step 2

Why this answer is correct

The correct answer is B. जाँच योग्य / Testable. A scientific question should be testable through observation or experiment. In exams choose the testable question.

Step 3

Exam Tip

वैज्ञानिक प्रश्न ऐसा होना चाहिए जिसकी जाँच अवलोकन या प्रयोग से की जा सके। परीक्षा में जाँच योग्य प्रश्न चुनें।

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इनमें से कौन सा प्रत्यक्ष अवलोकन है?

Which of these is a direct observation?

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Correct Answer

C. पत्ती हरी हैThe leaf is green

Step 1

Concept

The green colour of a leaf can be seen directly. In exams distinguish an observed fact from an opinion.

Step 2

Why this answer is correct

The correct answer is C. पत्ती हरी है / The leaf is green. The green colour of a leaf can be seen directly. In exams distinguish an observed fact from an opinion.

Step 3

Exam Tip

पत्ती का हरा रंग सीधे देखा जा सकता है। परीक्षा में देखे गए तथ्य और राय में अंतर करें।

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वैज्ञानिक अवलोकन दर्ज करने के लिए क्या उपयोग किया जा सकता है?

What can be used to record scientific observations?

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Correct Answer

D. अवलोकन पुस्तिकाObservation notebook

Step 1

Concept

Facts and measurements are recorded systematically in an observation notebook. In exams identify the correct recording tool.

Step 2

Why this answer is correct

The correct answer is D. अवलोकन पुस्तिका / Observation notebook. Facts and measurements are recorded systematically in an observation notebook. In exams identify the correct recording tool.

Step 3

Exam Tip

अवलोकन पुस्तिका में तथ्य और माप व्यवस्थित रूप से लिखे जाते हैं। परीक्षा में सही अभिलेखन साधन पहचानें।

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कौन सा प्रश्न वैज्ञानिक है?

Which question is scientific?

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Correct Answer

A. क्या प्रकाश पौधे की वृद्धि को प्रभावित करता है?Does light affect plant growth?

Step 1

Concept

The relationship between light and plant growth can be tested. In exams identify measurable questions.

Step 2

Why this answer is correct

The correct answer is A. क्या प्रकाश पौधे की वृद्धि को प्रभावित करता है? / Does light affect plant growth?. The relationship between light and plant growth can be tested. In exams identify measurable questions.

Step 3

Exam Tip

प्रकाश और पौधे की वृद्धि का संबंध जाँचा जा सकता है। परीक्षा में मापने योग्य प्रश्न पहचानें।

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तापमान मापने के लिए किस उपकरण का उपयोग किया जाता है?

Which instrument is used to measure temperature?

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Correct Answer

B. तापमापीThermometer

Step 1

Concept

A thermometer is used to measure temperature. In exams remember the correct match between an instrument and measurement.

Step 2

Why this answer is correct

The correct answer is B. तापमापी / Thermometer. A thermometer is used to measure temperature. In exams remember the correct match between an instrument and measurement.

Step 3

Exam Tip

तापमापी तापमान मापने का उपकरण है। परीक्षा में उपकरण और माप का सही मेल याद रखें।

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लंबाई मापने के लिए कौन सा उपकरण उपयुक्त है?

Which instrument is suitable for measuring length?

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Correct Answer

C. मीटर पैमानाMetre scale

Step 1

Concept

A metre scale is used to measure length. In exams also write the unit of measurement.

Step 2

Why this answer is correct

The correct answer is C. मीटर पैमाना / Metre scale. A metre scale is used to measure length. In exams also write the unit of measurement.

Step 3

Exam Tip

मीटर पैमाना लंबाई मापने के लिए उपयोग किया जाता है। परीक्षा में माप की इकाई भी लिखें।

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समय मापने के लिए क्या उपयोग किया जाता है?

What is used to measure time?

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Correct Answer

D. घड़ीClock

Step 1

Concept

A clock is used to measure time. In exams identify the correct unit of time.

Step 2

Why this answer is correct

The correct answer is D. घड़ी / Clock. A clock is used to measure time. In exams identify the correct unit of time.

Step 3

Exam Tip

घड़ी समय मापने के लिए उपयोग की जाती है। परीक्षा में समय की सही इकाई पहचानें।

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कौन सा अवलोकन संख्या पर आधारित है?

Which observation is based on a number?

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Correct Answer

A. पौधे की ऊँचाई दस सेंटीमीटर हैThe plant is ten centimetres tall

Step 1

Concept

An observation with a number and unit is quantitative. In exams choose statements containing measurements.

Step 2

Why this answer is correct

The correct answer is A. पौधे की ऊँचाई दस सेंटीमीटर है / The plant is ten centimetres tall. An observation with a number and unit is quantitative. In exams choose statements containing measurements.

Step 3

Exam Tip

संख्या और इकाई वाला अवलोकन मात्रात्मक होता है। परीक्षा में माप वाले कथन चुनें।

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कौन सा अवलोकन गुण बताता है?

Which observation describes a quality?

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Correct Answer

B. फूल पीला हैThe flower is yellow

Step 1

Concept

A description of colour is a qualitative observation. In exams identify descriptions without numbers.

Step 2

Why this answer is correct

The correct answer is B. फूल पीला है / The flower is yellow. A description of colour is a qualitative observation. In exams identify descriptions without numbers.

Step 3

Exam Tip

रंग का वर्णन गुणात्मक अवलोकन है। परीक्षा में बिना संख्या वाले वर्णन पहचानें।

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