18. Where does the initial source of energy creates winds?
A. The moon
C. The sun
B. The earth's surface
D. The rotation of the earth
19. When warm air rises,
A. High
pressure forms at the surface of land or sea.
C. Some
B. Low
20. When does the Southwest Monsoon or "Habagat" occur?
C. March to May
A. June to October
D. December to January
B. October to March
21. Which breeze blows from land to sea?
C. Land Breeze, day
A. Sea breeze, night
D. Sea Breeze, day
B. Land Breeze, night
22. Do land breezes typically happen during the day or night?
C. both A and B
A. night
D. None of them
B. day
23. In what cool and dry monsoonal wind occur from October to late March?
C. Southeast Monsoon
A. Northwest Monsoon
B. Southwest Monsoon
D. Northeast Monsoon
24. How does the wind move in a land breeze?
A. from land to the ocean
C. from east to west
B. from the sea to the land
D. from west to east
25. The strength of a sea breeze depends on
A. the heat of the day
B. the wind speed
C. the amount of precipitation that day
D. the difference between the temperature of the sea and land
D. none
Answers & Comments
Answer:
18. C. The sun
19. B. Low
20. A. June to October
21. D. Sea breeze, day
22. A. Night
23. C. Souteast Monsoon
24. A. Land to the ocean
25. D. the difference between the temperature of the sea and land.
Explanation:
18. The energy that drives wind originates with the sun, which heats the Earth unevenly, creating warm spots and cool spots.
19. However, water heats up much more slowly than land and so the air above the land will be warmer compared to the air over the ocean. The warm air over the land will rise throughout the day, causing low pressure at the surface. Over the water, high surface pressure will form because of the colder air.
20. The southwest monsoon affects the country from late June to October (occurrence may also vary each year). Low season in the Philippines occurs during the habagat season because of frequent rainfall and high humidity. A series of flash floods and landslides are regular incidents during this season.
21. The wind will blow from the higher pressure over the water to lower pressure over the land causing the sea breeze. The sea breeze strength will vary depending on the temperature difference between the land and the ocean. At night, the roles reverse. The air over the ocean is now warmer than the air over the land.
22. While sea breezes occur during the day, land breezes occur at night. Despite the difference in times at which the land breezes and sea breezes occur, the reason for the land breeze's formation is basically the same as the sea breeze, but the role of the ocean and land is reversed.
23. The northeast monsoon, commonly called amihan, affects eastern Philippines from October to late March. Initially a cold, dry air mass, it comes from Siberia and gathers moisture over the Pacific Ocean before reaching the eastern parts of the country.
24. The movement of the wind is a result of differences in air pressure over the land and the ocean (warm air is less dense and rises, while cool air is denser and sinks). As the temperature of the land surfaces cools, the warm air rises and creates a small area of high pressure near the land surface
25. The strength of the sea breeze depends on the difference in temperature between the land and ocean. Higher temperature gradients lead to stronger winds. During the night this sea breeze turns into a land breeze, because after sunset the sand will cool down much faster than the water due to its lower heat capacity.