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World Geography Practice Test: Humidity
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Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye.

World Geography Practice Test: Humidity
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25 Questions

1. A device used to measure humidity is called a
2. Assertion (A): The term relative humidity is reserved for systems of water vapour in air. Reason (R): The term relative saturation is used to describe the analogous property for systems consisting of a condensable phase other than water in a noncondensable phase other than air. Codes
3. Dew point normally occurs when a mass of air has a relative humidity of
4. Which of the following is defined as the ratio of the partial pressure of water vapour in a parcel of air to the saturated vapour pressure of water vapour at a prescribed temperature?
5. Humidity is the result of
6. All of the following statements are true except:
7. Relative humidity of atmosphere is measured by
8. Which of the following statements is/ are correct about convection?
9. Assertion (A): The amount of water vapour in the air at any given time is usually less than that required to saturate the air. Reason (R): The relative humidity is the percent of saturation humidity, generally calculated in relation to saturated vapour density. Codes
10. If the dew point is below freezing, it is referred to as
11. Assertion (A): Water vapour is a lighter gas than air at the same temperature, so humid air will tend to rise by natural convection. Reason (R): This is a mechanism behind thunderstorms and other weather phenomena. Codes
12. Assertion (A): Relative humidity is the ratio of the current absolute humidity to the highest possible absolute humidity. Reason (R): Reading of 100% relative humidity means that the air is totally saturated with water vapour and cannot hold any more, creating the possibility of rain. Codes
13. Which of the following instruments is used to measure humidity?
14. Condensation is a process which occurs when
15. Assertion (A): For a given dew point and its corresponding absolute humidity, the relative humidity will change inversely, albeit non–linearly, with the temperature. Reason (R): The partial pressure of water increases with temperature. Codes
16. The relative humidity of a region is low when
17. Relative humidity refers to
18. Which of the following statement is true?
19. What is relative humidity?
20. Which of the following is the temperature at which water vapour saturates from an air mass into liquid or solid usually forming rain, snow frost, or dew?
21. Assertion (A): Humidity is a measure of the amount of water vapour dissolved in the air, not including any liquid water or ice falling through the air. Reason (R): For clouds to form, and rain to start, the air doesn’t have to reach 100% relative humidity at the Earth’s surface, but only where the clouds and rain drops form. Codes
22. Match List-I with List-II and select the correct answer using the codes given below the lists: List-I List-II A.Evaporation 1.Release of moisture
B. Condensation2.Cold air moves into warm air C.Precipitation 3.Transformation of water vapour into water D.Insolation 4.Gain of heat
5. Incoming solar radiation Codes A B C D
23. Because of which one of the following factors, clouds do not precipitate in deserts?
24. Assertion (A) : Water vapour varies in concentration in the atmosphere both spatially and temporally. Reason (R) : The highest concentrations of water vapour are found near the equator over the oceans and tropical rain forests. Codes
25. The mass of water vapour divided by the mass of dry air in a volume of air at a given temperature is called

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