Seismic Waves and Tropical Cyclones Overview
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Questions and Answers

What is formed as warm air rises from the ocean surface?

  • Tropical cyclone
  • Trade wind
  • Low-pressure area (correct)
  • High-pressure area

What phenomenon causes the rising air from the surface to spiral around the storm's center?

  • Trade winds
  • Coriolis effect (correct)
  • Latent heat release
  • Intertropical convergence zone

Which zone is primarily responsible for the formation of tropical cyclones around the equator?

  • Polar region
  • Tropical belt
  • Subtropical high
  • Intertropical convergence zone (correct)

What is the primary purpose of the Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAG-ASA)?

<p>Issue flood and typhoon warnings (C)</p> Signup and view all the answers

Which correctly describes the Philippine Area of Responsibility (PAR)?

<p>Region monitored for tropical cyclones (B)</p> Signup and view all the answers

How do landmasses primarily affect tropical cyclones?

<p>They can inhibit the development of cyclones (A)</p> Signup and view all the answers

What happens during the latent heat of condensation?

<p>Energy is released into the atmosphere (C)</p> Signup and view all the answers

In which coordinate range is the PAR located according to the given examples?

<p>5°N-115°E to 5°N-119°E (A)</p> Signup and view all the answers

Which seismic wave is recorded first by a seismograph?

<p>P-wave (A)</p> Signup and view all the answers

What characteristic makes L-waves distinct among seismic waves?

<p>They have the greatest amplitude. (B)</p> Signup and view all the answers

In which ocean do hurricanes typically form?

<p>North Atlantic Ocean (A)</p> Signup and view all the answers

What classification is given to tropical cyclones with maximum sustained winds less than 61 km/h?

<p>Tropical Depression (D)</p> Signup and view all the answers

During which stage is a tropical cyclone characterized by high winds and swirling clouds?

<p>Mature Stage (B)</p> Signup and view all the answers

Which type of tropical cyclone has maximum sustained winds of 185 km/h or higher?

<p>Super Typhoon (B)</p> Signup and view all the answers

What are the essential conditions for the formative stage of a tropical cyclone?

<p>Tropical oceans that are large, still, and warm (A)</p> Signup and view all the answers

Which of the following best describes the S-wave?

<p>It is also known as a secondary wave. (C)</p> Signup and view all the answers

What effect does warm, moist air have on a tropical cyclone?

<p>Strengthens the cyclone (C)</p> Signup and view all the answers

What is the primary reason tropical cyclones can weaken when they encounter mountains?

<p>Loss of heat energy (D)</p> Signup and view all the answers

How often does Halley's Comet appear?

<p>Once every 75-76 years (B)</p> Signup and view all the answers

Which meteor shower occurs in mid-August every year?

<p>Perseids (B)</p> Signup and view all the answers

What characterizes a comet as a 'dirty snowball'?

<p>A mixture of ice and dust (B)</p> Signup and view all the answers

Why do tropical cyclones often strengthen when passing over plains and highlands?

<p>Increased surface friction (C)</p> Signup and view all the answers

What is a characteristic of asteroids?

<p>They are considered planetoids (D)</p> Signup and view all the answers

Which of the following statements is true about comet Tempel-Tuttle?

<p>It will next appear in May 2031 (B)</p> Signup and view all the answers

Flashcards

P-wave

The first type of seismic wave to be recorded by a seismograph. It travels through both solids and liquids.

S-wave

The second type of seismic wave to be recorded by a seismograph. It travels only through solids.

L-wave

The third type of seismic wave to be recorded by a seismograph. It travels along the Earth's surface and has the largest amplitude.

R-wave

The fourth type of seismic wave to be recorded by a seismograph. It travels the slowest and exists on any free surface of a continuous body.

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Tropical Cyclone

A rotating storm system that forms over tropical oceans and then moves over land.

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Hurricane

A tropical cyclone that forms in the North Atlantic Ocean.

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Typhoon

A tropical cyclone that forms in the Northwest Pacific Ocean.

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Mature Stage of a Tropical Cyclone

The stage when a tropical cyclone is fully formed and has strong winds and swirling clouds.

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Low-Pressure Area (LPA)

A low-pressure area formed when warm air rises from the ocean surface, creating an upward draft.

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Converging Low-Altitude Winds

Winds that converge towards a low-pressure area, replacing the rising warm air.

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Latent Heat of Condensation

The heat released when water vapor condenses into liquid water, adding energy to the storm.

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Coriolis Effect

A force created by the Earth's rotation, causing air to spiral around the center of a storm.

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Intertropical Convergence Zone (ITCZ)

The area around the equator where tropical cyclones often form due to warm ocean waters and converging winds.

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Philippine Atmospheric, Geophysical, and Astronomical Services Administration (PAG-ASA)

The national agency in the Philippines responsible for forecasting weather, issuing warnings, and providing advisories.

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Philippine Area of Responsibility (PAR)

The area around the Philippines where tropical cyclones are monitored and warnings are issued.

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How Landmasses and Bodies of Water Affect Typhoons

Land masses and bodies of water significantly influence the path and intensity of typhoons.

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How do plains and highlands affect typhoons?

The force of friction increases when a typhoon passes over plains and highlands, resulting in a strengthening of the storm.

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How do mountains affect typhoons?

Tropical cyclones are weakened significantly when they encounter mountainous terrain.

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Why do tropical cyclones weaken in cold climates?

Tropical cyclones are weakened when they reach colder climates and lose access to warm, moist air, ultimately dissipating completely.

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What is a comet?

Comets are celestial bodies made up primarily of ice and dust, appearing as brilliant, glowing objects when they approach the sun.

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What is a meteor?

Meteors, also known as shooting stars, are small particles of space debris that burn up in the Earth's atmosphere, creating a bright streak of light.

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What is an asteroid?

Asteroids are rocky celestial bodies that orbit the sun, sometimes referred to as planetoids or dwarf planets.

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What is a meteor shower?

A meteor shower is a celestial phenomenon where numerous meteors become visible in the night sky, originating from a specific radiant point.

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What is the radiant point in a meteor shower?

The radiant point is the point in the sky from which the meteors in a shower appear to originate.

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Study Notes

Seismic Waves

  • P-waves are the first waves detected by a seismograph, also known as primary waves.
  • S-waves are the second waves detected, also called secondary waves.
  • L-waves are the third waves detected, with the greatest amplitude and low frequency. They are named after Augustus Edward Love.
  • R-waves are the slowest and exist on any free surface within a continuous body.

Tropical Cyclones

  • PAG-ASA classifies tropical cyclones based on maximum sustained winds near the center.
  • Hurricanes form in the North Atlantic Ocean affecting the Caribbean Sea.
  • Typhoons form in the Northwest Pacific Ocean, impacting Southeast Asia, the West Philippine Sea, and Japan.
  • Tropical cyclones develop through three stages:
    • Formative/origin stage: Conditions needed for formation are met.
    • Mature stage: Packed with raging winds and swirling clouds.
    • Dissipation stage: Weakening and eventual disappearance due to lack of moisture.
  • Factors for tropical cyclone formation:
    • Warm, large, and still tropical oceans.
    • Convergence of low-altitude winds (trade winds).
    • Latent heat of condensation (energy released).
    • Coriolis effect (Earth's rotation).

Tropical Cyclone Categories

Classification Maximum Sustained Winds (km/h)
Tropical Depression (TD) < 61
Tropical Storm (TS) 62 to 88
Severe Tropical Storm (STS) 89 to 117
Typhoon (TY) 118 to 184
Super Typhoon (STY) 185 or higher

Typhoon Impact on the Philippines

  • Philippines is prone to typhoons due to its proximity to the equator and surrounding oceans.
  • ITCZ (Intertropical Convergence Zone) is where tropical cyclones often form.
  • PAG-ASA (Philippine Atmospheric, Geophysical, and Astronomical Services Administration) issues typhoon warnings and forecasts.
  • Philippine Area of Responsibility (PAR) monitors tropical cyclones and issues warnings within designated coordinates as indicated on the map provided.

Landmasses and Water Bodies Affect on Typhoons

  • Cold oceans in colder regions: tropical cyclones dissipate.
  • Warm, moist air access: strengthens tropical cyclones.
  • Mountains: weaken typhoons by 50%.
  • Plains and highlands: strengthen typhoons due to increased surface friction.

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Description

Explore the fascinating phenomena of seismic waves and tropical cyclones in this quiz. Learn about P-waves, S-waves, L-waves, and R-waves, along with the classification and formation stages of tropical cyclones. Test your knowledge on these critical natural events!

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