Atmosphere - Practice Test 3

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

1. Q1.Which clouds cause thunderstorms and heavy rain?

   • A.Cumulonimbus✓ Correct Answer
   • B.Cirrostratus
   • C.Altocumulus
   • D.Stratus

   Explanation: Cumulonimbus are towering clouds associated with thunder and lightning.

2. Q2.Rainfall caused by mountains blocking wind is called:

   • A.Orographic / Relief Rainfall✓ Correct Answer
   • B.Convectional Rainfall
   • C.Cyclonic Rainfall
   • D.Frontal Rainfall

   Explanation: Orographic rain occurs on the windward side of mountains.

3. Q3.Convectional rainfall is common in:

   • A.Equatorial Region✓ Correct Answer
   • B.Polar Region
   • C.Temperate Region
   • D.Deserts

   Explanation: Daily heating creates convection currents causing afternoon rain in equatorial regions.

4. Q4.Cyclones in the Atlantic Ocean are called:

   • A.Hurricanes✓ Correct Answer
   • B.Typhoons
   • C.Cyclones
   • D.Willy-Willies

   Explanation: Atlantic/Caribbean storms are Hurricanes.

5. Q5.Cyclones in the China Sea and Pacific are called:

   • A.Typhoons✓ Correct Answer
   • B.Hurricanes
   • C.Tornadoes
   • D.Cyclones

   Explanation: In the NW Pacific, they are Typhoons.

6. Q6.Cyclones in Australia are known as:

   • A.Willy-Willies✓ Correct Answer
   • B.Typhoons
   • C.Hurricanes
   • D.Baguio

   Explanation: Willy-Willy is the Australian term.

7. Q7.The center of a cyclone is a calm area called the:

   • A.Eye✓ Correct Answer
   • B.Core
   • C.Focus
   • D.Epicenter

   Explanation: The Eye of the cyclone is a low-pressure calm region.

8. Q8.In the Northern Hemisphere, winds in a cyclone move in which direction?

   • A.Anti-clockwise✓ Correct Answer
   • B.Clockwise
   • C.Straight
   • D.Vertical

   Explanation: Cyclones rotate anti-clockwise in the North due to Coriolis force.

9. Q9.In an Anticyclone, the pressure is:

   • A.High in the center✓ Correct Answer
   • B.Low in the center
   • C.Equal everywhere
   • D.Zero

   Explanation: Anticyclones have High pressure in the center and diverging winds.

10. Q10.Which gas protects Earth from harmful Ultraviolet (UV) radiation?

    • A.Ozone✓ Correct Answer
    • B.Carbon Dioxide
    • C.Nitrogen
    • D.Oxygen

    Explanation: Ozone (O3) in the stratosphere absorbs UV rays.

11. Q11.Which gas is the main contributor to Global Warming?

    • A.Carbon Dioxide✓ Correct Answer
    • B.Argon
    • C.Nitrogen
    • D.Oxygen

    Explanation: CO2 is the primary greenhouse gas.

12. Q12.The Ionosphere is part of which layer?

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

    Explanation: Ionosphere is the ionized part of the Thermosphere.

13. Q13.Which layer is free from clouds and weather?

    • A.Stratosphere✓ Correct Answer
    • B.Troposphere
    • C.Mesosphere
    • D.None

    Explanation: Stratosphere is mostly cloud-free.

14. Q14.The temperature inversion phenomenon refers to:

    • A.Increase of temperature with height✓ Correct Answer
    • B.Decrease of temperature with height
    • C.Constant temperature
    • D.Freezing temperature

    Explanation: Normally temp decreases with height; inversion is the reverse (warmer air over cold).

15. Q15.Which wind is called 'Snow Eater'?

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

    Explanation: Chinook melts snow in the Rockies.

16. Q16.Which is a cold local wind?

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

    Explanation: Mistral (France) is cold; others are warm.

17. Q17.The Doldrums are located near:

    • A.Equator (5° N to 5° S)✓ Correct Answer
    • B.30° N
    • C.60° N
    • D.Poles

    Explanation: Doldrums is the equatorial low-pressure belt.

18. Q18.Which layer helps in telecommunication?

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

    Explanation: Ionosphere reflects radio signals.

19. Q19.The unit of measuring ozone thickness is:

    • A.Dobson Unit✓ Correct Answer
    • B.Decibel
    • C.Pascal
    • D.Knot

    Explanation: Dobson Unit (DU) measures ozone column.

20. Q20.Which cloud type is associated with a 'Halo' around the sun/moon?

    • A.Cirrostratus✓ Correct Answer
    • B.Cumulus
    • C.Stratus
    • D.Nimbus

    Explanation: Cirrostratus ice crystals refract light forming halos.