1. In which country was the watercolor painting method first used?

Ans. in the third century AD was the first watercolor method was used in China.

2. Why doesn't the spider get caught in its net?

Ans. Spiders' legs have a special kind of lubrication that prevents them from getting caught.

3. What is the name of the Muslim scientist who added zero to the numbers?

Ans. Muhammad Ibn Musa Al-Khwarizmi is a Muslim scientist who added zero to the numbers.

4. Which scientist discovered that water is made up of hydrogen and oxygen?

Ans. Leviathan discovered that water is made up of hydrogen and oxygen.

5. Which water will be frozen first in simple water and saltwater?

Ans. Simple water will be frozen first in saltwater and plain water.

6. What is the device used to measure the height of an airplane from sea level?

Ans. An altimeter is a device that is used to measure the height of an airplane from sea level.

7. What is meant by absolute zero?

Ans. When the temperature is at 273c or 0k it is called absolute Zero.

8. What is the maximum depth of the earth's surface?

Ans. The depth of the earth's surface is a maximum of 32 km.

9. Are there days and nights on the moon?

Ans. Yes, there are days and nights on the moon One day of the moon and one night is equal to our two weeks.

10. What is the temperature of the moon?

Ans. Temperatures on the moon are at the freezing point at night and at a boiling point at day.

11. Which scientist wrote the first Imaginary travel book on the moon?

Ans. The first book on imaginary travel to the moon was written by the Greek Lucian in 120 AD.

12. Which is the first game to be played on the moon?

Ans. Golf is the first game played on the moon.