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scientific hypothesis MCQ Questions for Class 9

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3 questions tagged with scientific hypothesis.

Question 1/3 Expert Science Exploration: Entering the World of Secondary Science Hypothesis and experimentation Class 9 Level 9

निम्न में से कौन-सी परिकल्पना सबसे अधिक खंडनीय है?

Which of the following hypotheses is the most falsifiable?

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Correct Answer

C. समान दशाओं में अधिक नाइट्रोजन पाने वाले गेहूँ के पौधों की औसत ऊँचाई अधिक होगीUnder identical conditions wheat plants receiving more nitrogen will have a greater mean height

Step 1

Concept

A falsifiable hypothesis can potentially be shown false by observation. In exams choose a clear measurable prediction.

Step 2

Why this answer is correct

The correct answer is C. समान दशाओं में अधिक नाइट्रोजन पाने वाले गेहूँ के पौधों की औसत ऊँचाई अधिक होगी / Under identical conditions wheat plants receiving more nitrogen will have a greater mean height. A falsifiable hypothesis can potentially be shown false by observation. In exams choose a clear measurable prediction.

Step 3

Exam Tip

खंडनीय परिकल्पना ऐसी होनी चाहिए जिसे अवलोकन द्वारा गलत सिद्ध किया जा सके। परीक्षा में स्पष्ट माप योग्य भविष्यवाणी चुनें।

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Question 2/3 Expert Science Exploration: Entering the World of Secondary Science Hypothesis and experimentation Class 9 Level 8

बीज अंकुरण पर तापमान के प्रभाव की जांच में कौन-सी परिकल्पना सबसे अधिक वैज्ञानिक है?

Which hypothesis is most scientific for investigating the effect of temperature on seed germination?

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Correct Answer

B. यदि तापमान \(20^\circ C\) से \(30^\circ C\) किया जाए तो समान समय में अंकुरित बीजों का प्रतिशत बढ़ेगाIf temperature is raised from \(20^\circ C\) to \(30^\circ C\) then the percentage of seeds germinated in the same time will increase

Step 1

Concept

This hypothesis states clear variables and a measurable outcome. In exams an if-then hypothesis is often useful.

Step 2

Why this answer is correct

The correct answer is B. यदि तापमान \(20^\circ C\) से \(30^\circ C\) किया जाए तो समान समय में अंकुरित बीजों का प्रतिशत बढ़ेगा / If temperature is raised from \(20^\circ C\) to \(30^\circ C\) then the percentage of seeds germinated in the same time will increase. This hypothesis states clear variables and a measurable outcome. In exams an if-then hypothesis is often useful.

Step 3

Exam Tip

यह परिकल्पना स्पष्ट चर और मापने योग्य परिणाम बताती है। परीक्षा में यदि-तो रूप वाली परिकल्पना उपयोगी होती है।

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Question 3/3 Hard Science Exploration: Entering the World of Secondary Science Hypothesis and experimentation Class 9 Level 7

एक परिकल्पना को वैज्ञानिक रूप से अस्वीकार्य कब माना जाएगा?

When would a hypothesis be considered scientifically unsuitable?

Explanation opens after your attempt
Correct Answer

B. जब उसे किसी प्रेक्षण या प्रयोग से गलत सिद्ध ही न किया जा सकेWhen no observation or experiment could ever show it to be false

Step 1

Concept

A scientific hypothesis must be falsifiable so evidence could potentially show it to be wrong. In exams look for both testability and falsifiability.

Step 2

Why this answer is correct

The correct answer is B. जब उसे किसी प्रेक्षण या प्रयोग से गलत सिद्ध ही न किया जा सके / When no observation or experiment could ever show it to be false. A scientific hypothesis must be falsifiable so evidence could potentially show it to be wrong. In exams look for both testability and falsifiability.

Step 3

Exam Tip

वैज्ञानिक परिकल्पना खंडनीय होनी चाहिए अर्थात उसके गलत होने की संभावना जाँची जा सके। परीक्षा में परीक्षण और खंडनीयता दोनों देखें।

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