Atmosphere - Practice Test 4

Attempt the quiz above first, then review every question with its correct answer and a short explanation below.

1. Q1.Blizzards are characteristic of which region?

   • A.Polar Regions✓ Correct Answer
   • B.Equatorial Regions
   • C.Desert Regions
   • D.Tropical Regions

   Explanation: Blizzards are severe snowstorms in polar/cold regions.

2. Q2.Which instrument measures humidity?

   • A.Hygrometer✓ Correct Answer
   • B.Hydrometer
   • C.Barometer
   • D.Pyrometer

   Explanation: Hygrometer (Wet/Dry bulb) measures humidity.

3. Q3.Which local wind flows in the Alps and is warm/dry?

   • A.Foehn✓ Correct Answer
   • B.Mistral
   • C.Bora
   • D.Blizzard

   Explanation: Foehn is the warm wind in the Alps.

4. Q4.Which wind causes 'Blood Rain' in Italy?

   • A.Sirocco✓ Correct Answer
   • B.Mistral
   • C.Fohn
   • D.Chinook

   Explanation: Sirocco carries red Saharan dust, coloring the rain red.

5. Q5.The deflection of winds to the left in the Southern Hemisphere is due to:

   • A.Coriolis Force✓ Correct Answer
   • B.Centrifugal Force
   • C.Gravitational Force
   • D.Magnetic Force

   Explanation: Earth's rotation creates the Coriolis effect.

6. Q6.What is 'Smog'?

   • A.Smoke + Fog✓ Correct Answer
   • B.Smoke + Rain
   • C.Fog + Dust
   • D.Fog + Ozone

   Explanation: Smog is a mixture of Smoke and Fog.

7. Q7.The lowest temperature is recorded in which atmospheric layer?

   • A.Mesosphere✓ Correct Answer
   • B.Troposphere
   • C.Stratosphere
   • D.Thermosphere

   Explanation: Mesopause (top of Mesosphere) is the coldest point (~ -100°C).

8. Q8.Which cloud is often called 'Thunderhead'?

   • A.Cumulonimbus✓ Correct Answer
   • B.Cirrus
   • C.Stratus
   • D.Altostratus

   Explanation: Cumulonimbus anvil-shaped clouds bring storms.

9. Q9.Relative humidity is expressed in:

   • A.Percentage✓ Correct Answer
   • B.Grams
   • C.Kilograms
   • D.Degrees

   Explanation: RH is the % of moisture present vs capacity.

10. Q10.Isohyets connect places of equal:

    • A.Rainfall✓ Correct Answer
    • B.Temperature
    • C.Pressure
    • D.Salinity

    Explanation: Isohyets map rainfall.

11. Q11.Isotherms connect places of equal:

    • A.Temperature✓ Correct Answer
    • B.Rainfall
    • C.Pressure
    • D.Cloudiness

    Explanation: Isotherms map temperature.

12. Q12.The calm center of a tropical cyclone is called:

    • A.Eye✓ Correct Answer
    • B.Wall
    • C.Vortex
    • D.Nucleus

    Explanation: Repeated concept: Eye.

13. Q13.Tornadoes are most common in:

    • A.USA✓ Correct Answer
    • B.India
    • C.Russia
    • D.Brazil

    Explanation: USA (Tornado Alley) sees the most tornadoes.

14. Q14.Which of these is a High cloud?

    • A.Cirrus✓ Correct Answer
    • B.Stratus
    • C.Cumulus
    • D.Nimbostratus

    Explanation: Cirrus, Cirrostratus, Cirrocumulus are high clouds (above 6km).

15. Q15.Which layer contains the International Space Station (ISS)?

    • A.Thermosphere✓ Correct Answer
    • B.Exosphere
    • C.Mesosphere
    • D.Stratosphere

    Explanation: ISS orbits in the Thermosphere (LEO).

16. Q16.The gaseous envelope surrounding the earth is called:

    • A.Atmosphere✓ Correct Answer
    • B.Lithosphere
    • C.Hydrosphere
    • D.Biosphere

    Explanation: Atmosphere is the layer of gases.

17. Q17.Insolation reaches the earth's surface in the form of:

    • A.Short waves✓ Correct Answer
    • B.Long waves
    • C.Microwaves
    • D.Radio waves

    Explanation: Solar radiation is Short wave; Terrestrial radiation is Long wave.

18. Q18.At night, the earth cools down mainly by:

    • A.Terrestrial Radiation✓ Correct Answer
    • B.Insolation
    • C.Conduction
    • D.Convection

    Explanation: Earth radiates heat back as Long wave Terrestrial Radiation.

19. Q19.The average air pressure at sea level is:

    • A.1013.25 mb✓ Correct Answer
    • B.1000 mb
    • C.760 mb
    • D.950 mb

    Explanation: Standard pressure is 1013.25 hPa/mb.

20. Q20.Which wind is called 'Doctor Wind'?

    • A.Harmattan✓ Correct Answer
    • B.Loo
    • C.Chinook
    • D.Mistral

    Explanation: Repeated concept: Harmattan.