Options:
- A. Glaciers
- B. Desert
- C. Islands
- D. Volcanoes
View Answer
B. Desert
Everyday Science
Which of the following vitamins promote healthy functioning of eyes in human beings?
Options:
View Answer
Short-sightedness can be corrected by using ___________?
Options:
View Answer
What is the average adult pulse rate?
Options:
View Answer
Which of the following explains the reason why there is no total eclipse of the sun?
Options:
- A. Size of the earth in relation to that of moon
- B. Orbit of moon around earth
- C. Direction of rotation of earth around sun
- D. Area of the sun covered by the moon
View Answer
D. Area of the sun covered by the moon
Which of the following atmospheric layers help in radio communication?
Options:
- A. Exosphere
- B. Ionosphere
- C. Troposphere
- D. Stratosphere
View Answer
B. Ionosphere
Quartz crystal in quartz watches work on the principle called?
Options:
- A. Photoelectric effect
- B. Stark effect
- C. Thermionic effect
- D. Piezo-electric effect
View Answer
D. Piezo-electric effect