Question 2 :
lf you touch your _________ ear with your righthand in front of a plane mirror, it will be seen in the mirror that your right ear is touched with _______ .

Question 3 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d07bf59b460d7261f2fe.jpg' /> Light is falling on surface $S_1$, $S_2$, $S_3$ as shown in the above figure. Surfaces on which the angle of incidence is equal to the angle of reflection is/are

Question 8 :
If the angle of incidence ray is given $30^{\circ}$, then what is the angle of reflection?

Question 9 :
<img style='object-fit:contain' src='https://teachmint.storage.googleapis.com/question_assets/cbse_ncert/61b1d07cf59b460d7261f300.jpg' /> In the above figure, two mirrors A and B are placed at right angles to each other. A ray of light incident on mirror A at an angle of $25^\circ$ falls on mirror B after reflection. The angle of reflection for the ray reflected from mirror B would be

Question 10 :
Which part of the eye gets affected if someone is suffering from cataract?

Question 11 :
Reflection from a smooth surface like that of a mirror is called ______ ?

Question 13 :
An interesting feature of a kaleidoscope is that you will never see the same pattern again. Is it TRUE OR FALSE?

Question 14 :
How many times is a ray of light reflected by two plane mirrors placed parallel and facing each other?

Question 15 :
The outer coat of the eye is white. It is tough so that it can protect the interior of the eye from accidents. Its transparent front part is called ______?

Question 19 :
The length of the the comet's tail grows in size as it approaches the _____.

Question 21 :
Paheli saw the moon through a glass window at 8:00 p.m. She marked the position of the moon on the glass pane. She got up at 4 a.m. in the morning. Will the moon be visible at the same position?

Question 23 :
State true or false. The planet nearest to us is Jupiter.

Question 24 :
True or False. The Earth is the only planet in the solar system on which life is known to exist.

Question 26 :
State true or False. When astronauts landed on the moon, they found that the moon’s surface is dusty and barren.

Question 27 :
The first of a month is the new moon day. On fifteenth of the same month, which of the following figures would represent the phase of the moon?

Question 28 :
After crescent moon, the moon grows larger every day. On the ______ day once again we get a full view of the moon.

Question 29 :
Which planet is earth’s nearest neighbour and is the brightest planet in the night sky?

Question 30 :
________ has been associated with seven well known ancient Indian sages, or rishis.

Question 31 :
It is a convention to call the charge acquired by a glass rod when it is rubbed with silk as positive. The other kind of charge is said to be negative. Is it TRUE OR FALSE?

Question 32 :
In an electroscope if a negatively charged body is brought in contact with the metal clip, the strips of the electroscope diverge. If now another charged object carrying equal amount of positive charge is brought in contact with the clip, what will happen?

Question 33 :
Why our hair stands when we take off woollen or polyester cloth?

Question 34 :
An earthquake measures 3 on the richer scale. Would it be recorded by a seismograph?