Question 9

Paheli and Boojho observe a bright object in the night sky which was not twinkling. Paheli says, it is a star and Boojho says it is a planet. Who is correct?

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Solution

Boojho is correct. Only planet has the property not to twinkle, however, light due to star comes from very far distance and therefore, twinkles.

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Q. Paheli and Boojho observe a bright object in the night sky which was not twinkling. Paheli says, it is a star and Boojho says it is a planet. Who is correct? Do stars emit light only during night? [2 MARKS]

Q. Paheli switches on a torch and aims it at a mirror. The reflected light from the mirror falls on Boojho, who is standing beside Paheli. For Boojho, what kind of objects are the torch and the mirror?

Question 3

Paheli and Boojho measured their body temperature. Paheli found her’s to be ${98.6}^{\circ} F$ and Boojho recorded $37^{\circ} C$ . Which of the followng statement is true?

(a) Paheli has a higher body temperature than boojho.

(b) Paheli has a lower body temperature than boojho

(d) Both are suffering from fever.

Question 12

If Boojho covers a certain distance in one hour and Paheli covers the same distance In two hours. Who travels in a higher speed?

Question 11

Paheli and Boojho have to cover different distances to reach their school but they take the same time to reach the school. What can you say about their speed?

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Question 9 Paheli and Boojho observe a bright object in the night sky which was not twinkling. Paheli says, it is a star and Boojho says it is a planet. Who is correct?

Boojho is correct. Only planet has the property not to twinkle, however, light due to star comes from very far distance and therefore, twinkles.

Question 9

Paheli and Boojho observe a bright object in the night sky which was not twinkling. Paheli says, it is a star and Boojho says it is a planet. Who is correct?