17. Which is the strongest evidence that the outer core of the earth is liquid?
A. P-waves are transmitted through the outer core.
B. S-waves speed up as they move through the outer core.
C. S-waves disappear as they move through the outer core.
D. P-waves disappear as they move through the outer core.
18. How do typhoons develop?
A. Typhoons develop from equal heating of the earth's surface resulting in the
convection of moist air.
B. Typhoons develop from the rising of warm, moist air over the ocean causing an
area of lower air pressure below.
C. Typhoons develop beneath the cumulonimbus clouds where swirling wind goes
down to pick moisture from the sea.
D. Typhoons develop during rainy seasons due to the abundance of water vapour
in the clouds which strengthens the wind speed.
19. What is the difference among typhoon, cyclone and hurricane?
A. Typhoons are strong storms, cyclones are worse and hurricanes are the
strongest of all
B. Hurricanes and typhoons spin clockwise, and cyclones spin counter clockwise
C. Typhoons happen near the equator, hurricanes in the mid-latitudes and
cyclones are in the arctic and antarctic.
D. The storms are the same but these names are used in the Western Pacific,
North America and near the Indian Ocean, respectively.
20. What is the relationship between the bodies of water surrounding the country and
typhoon?
A. The bodies of water bring bad weather to the country.
B. The bodies of water are breeding grounds of typhoon.
C. The bodies of water make the country experience cloudy skies.
D. The bodies of water always bring rainy seasons to the Philippines,
21. What is the average number of typhoons that enter the Philippine Area of
Responsibility each year?
A. 10
B. 15
C. 20
D. 30
22. Which tropical cyclone category has a maximum sustained wind of 61 kph
(kilometres per hour)?
A. typhoon
C. tropical storm
B. super typhoon
D. tropical depression
23. If the storm has a wind speed between 119 and 200 kph, in which tropical cyclone
category it can be classified?
A. typhoon
C. tropical storm
B. tropical depression
D. super typhoon
24. Why would the Philippine Atmospheric Geophysical and Astronomical Services
Administration (PAG-ASA) needs to monitor the typhoon which is at 15°N, 122°E?
A. Because it is within the Philippine Area of Responsibility.
B. Because it is away from the Philippine Area of Responsibility.
C. Because it will not reach the Philippine Area of Responsibility.
D. Because it is approaching the Philippine Area of Responsibility.
25. What happens when a typhoon entered the Philippine Area of Responsibility?
A. The typhoon moves faster.
B. The typhoon becomes stronger.
C. The typhoon is named based on the local list of names.
D. The typhoon is considered destructive as it approaches the country,
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