Class 9 Science - Exploration: Entering the World of Secondary Science - Variables in an experiment Easy Quiz

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यदि दो विद्यार्थियों को एक ही प्रयोग में अलग परिणाम मिलें तो पहला उचित कदम क्या है?

If two students obtain different results in the same experiment what should be the first suitable step?

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Correct Answer

C. विधि और मापन की जांच करनाCheck the method and measurements

Step 1

Concept

When results differ the method and measurements should be checked. Compare evidence before identifying an error.

Step 2

Why this answer is correct

The correct answer is C. विधि और मापन की जांच करना / Check the method and measurements. When results differ the method and measurements should be checked. Compare evidence before identifying an error.

Step 3

Exam Tip

अलग परिणाम मिलने पर विधि और मापन की जांच करनी चाहिए। त्रुटि खोजने से पहले प्रमाणों की तुलना करें।

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किसी वैज्ञानिक प्रयोग में केवल एक कारक बदलने का लाभ क्या है?

What is the benefit of changing only one factor in a scientific experiment?

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Correct Answer

C. परिवर्तन के कारण की पहचान आसान होती हैIt becomes easier to identify the cause of change

Step 1

Concept

Changing one factor makes its effect easier to identify. This principle is used in a fair test.

Step 2

Why this answer is correct

The correct answer is C. परिवर्तन के कारण की पहचान आसान होती है / It becomes easier to identify the cause of change. Changing one factor makes its effect easier to identify. This principle is used in a fair test.

Step 3

Exam Tip

एक कारक बदलने से उसके प्रभाव की पहचान स्पष्ट होती है। निष्पक्ष परीक्षण में यही सिद्धांत अपनाया जाता है।

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एक प्रयोग में स्वतंत्र चर किसे कहा जाता है?

What is called the independent variable in an experiment?

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Correct Answer

C. जिसे जांचकर्ता जानबूझकर बदलता हैThe factor deliberately changed by the investigator

Step 1

Concept

The independent variable is the factor changed by the investigator. Identifying the changed factor is useful in exams.

Step 2

Why this answer is correct

The correct answer is C. जिसे जांचकर्ता जानबूझकर बदलता है / The factor deliberately changed by the investigator. The independent variable is the factor changed by the investigator. Identifying the changed factor is useful in exams.

Step 3

Exam Tip

स्वतंत्र चर वह कारक है जिसे जांचकर्ता बदलता है। बदला गया कारक पहचानना परीक्षा में उपयोगी है।

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एक प्रयोग में आश्रित चर क्या होता है?

What is the dependent variable in an experiment?

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Correct Answer

D. वह परिणाम जिसे मापा या देखा जाता हैThe outcome that is measured or observed

Step 1

Concept

The dependent variable is measured as the effect of the changed factor. Think of it as the outcome variable.

Step 2

Why this answer is correct

The correct answer is D. वह परिणाम जिसे मापा या देखा जाता है / The outcome that is measured or observed. The dependent variable is measured as the effect of the changed factor. Think of it as the outcome variable.

Step 3

Exam Tip

आश्रित चर बदले गए कारक के प्रभाव के रूप में मापा जाता है। इसे परिणाम वाला चर समझें।

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समान परिस्थितियों में प्रयोग करना क्यों आवश्यक है?

Why is it necessary to conduct an experiment under similar conditions?

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Correct Answer

A. ताकि तुलना निष्पक्ष होSo that the comparison is fair

Step 1

Concept

Similar conditions help compare effects correctly. Controlled conditions are part of a fair test.

Step 2

Why this answer is correct

The correct answer is A. ताकि तुलना निष्पक्ष हो / So that the comparison is fair. Similar conditions help compare effects correctly. Controlled conditions are part of a fair test.

Step 3

Exam Tip

समान परिस्थितियां प्रभाव की सही तुलना करने में मदद करती हैं। नियंत्रित स्थितियां निष्पक्ष परीक्षण का भाग हैं।

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यदि किसी प्रयोग की विधि स्पष्ट न लिखी जाए तो क्या कठिनाई हो सकती है?

What difficulty may arise if the method of an experiment is not written clearly?

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Correct Answer

D. दूसरे लोग प्रयोग सही ढंग से दोहरा नहीं पाएंगेOthers may not repeat the experiment correctly

Step 1

Concept

Without a clear method correct repetition of the experiment is difficult. Steps should be written in order.

Step 2

Why this answer is correct

The correct answer is D. दूसरे लोग प्रयोग सही ढंग से दोहरा नहीं पाएंगे / Others may not repeat the experiment correctly. Without a clear method correct repetition of the experiment is difficult. Steps should be written in order.

Step 3

Exam Tip

स्पष्ट विधि के बिना प्रयोग का सही पुनरावर्तन कठिन होता है। चरणों को क्रम से लिखना जरूरी है।

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किसी प्रयोग में सावधानी से निर्देश पढ़ना क्यों जरूरी है?

Why is it necessary to read instructions carefully in an experiment?

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Correct Answer

B. सही प्रक्रिया और सुरक्षा सुनिश्चित करने के लिएTo ensure correct procedure and safety

Step 1

Concept

Instructions help ensure correct procedure and safe work. Read them before starting an experiment.

Step 2

Why this answer is correct

The correct answer is B. सही प्रक्रिया और सुरक्षा सुनिश्चित करने के लिए / To ensure correct procedure and safety. Instructions help ensure correct procedure and safe work. Read them before starting an experiment.

Step 3

Exam Tip

निर्देश सही प्रक्रिया और सुरक्षित कार्य में सहायता करते हैं। प्रयोग शुरू करने से पहले उन्हें पढ़ें।

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यदि किसी प्रयोग का परिणाम अपेक्षा के अनुरूप हो तो भी क्या करना चाहिए?

What should still be done if an experimental result matches the expectation?

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Correct Answer

D. परिणाम दर्ज कर प्रमाण से निष्कर्ष की जांच करनाRecord the result and check the conclusion against evidence

Step 1

Concept

An expected result should also be recorded and examined properly. Agreement alone is not proof of truth.

Step 2

Why this answer is correct

The correct answer is D. परिणाम दर्ज कर प्रमाण से निष्कर्ष की जांच करना / Record the result and check the conclusion against evidence. An expected result should also be recorded and examined properly. Agreement alone is not proof of truth.

Step 3

Exam Tip

अपेक्षित परिणाम को भी ठीक से दर्ज और जांचना चाहिए। मेल होना सत्यता का अकेला प्रमाण नहीं है।

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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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