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initial-temperature MCQ Questions for Class 9

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2 questions tagged with initial-temperature.

Question 1/2 Hard Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

एक विद्यार्थी अलग-अलग तापमान पर पानी ठंडा होने का समय मापना चाहता है। यदि प्रारंभिक पानी का तापमान हर परीक्षण में अलग है तो क्या होगा?

A student wants to measure cooling time under different room temperatures. What happens if the initial water temperature differs in every trial?

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Correct Answer

B. प्रारंभिक तापमान भ्रमकारी चर बनेगाInitial temperature will become a confounding variable

Step 1

Concept

Initial water temperature affects cooling time so changing it creates confounding. It should be kept constant.

Step 2

Why this answer is correct

The correct answer is B. प्रारंभिक तापमान भ्रमकारी चर बनेगा / Initial temperature will become a confounding variable. Initial water temperature affects cooling time so changing it creates confounding. It should be kept constant.

Step 3

Exam Tip

प्रारंभिक पानी का तापमान ठंडा होने के समय को प्रभावित करता है इसलिए उसका बदलना भ्रम पैदा करेगा। इसे समान रखना चाहिए।

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Question 2/2 Medium Science Exploration: Entering the World of Secondary Science Variables in an experiment Class 9 Level 12

भोजन गर्म करने के प्रयोग में प्रारंभिक तापमान समान रखना क्यों जरूरी है?

Why should the initial temperature be kept the same in a food-heating experiment?

Explanation opens after your attempt
Correct Answer

B. ताकि अंतिम तापमान की निष्पक्ष तुलना होSo final temperatures can be compared fairly

Step 1

Concept

Different starting temperatures will affect the final temperature. In exams keep the baseline condition the same.

Step 2

Why this answer is correct

The correct answer is B. ताकि अंतिम तापमान की निष्पक्ष तुलना हो / So final temperatures can be compared fairly. Different starting temperatures will affect the final temperature. In exams keep the baseline condition the same.

Step 3

Exam Tip

अलग प्रारंभिक तापमान अंतिम तापमान को प्रभावित करेगा। परीक्षा में आधार स्थिति समान रखें।

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