Unit 7

Question 1

is an organized, rotating system of clouds and thunderstorms that initially form over tropical ocean water

Answer 1

tropical cyclone

Question 2

when it forms over the northwest Pacific

Answer 2

Typhoon

Question 3

when it forms over the Atlantic and the east Pacific

Answer 3

Hurricane

Question 4

when it forms over the Indian Ocean and south Pacific

Answer 4

Tropical cyclone

Question 5

Parts of a Typhoon

Answer 5

eye
eyewall or wall cloud

Question 6

the center of the typhoon
the calmest portion
the point at which the winds rotate

Answer 6

eye

Question 7

the area with the strongest winds

Answer 7

eyewall or wall cloud

Question 8

The Philippines experiences an average of 20 tropical cyclones annually,

Question 9

less than or equal to 61 km/hr

Answer 9

Tropical Depression

Question 10

62 km/hr to 88 km/hr

Answer 10

Tropical Storm

Question 11

89 km/hr to 117 km/hr

Answer 11

Severe Tropical Storm

Question 12

118 km/hr to 220 km/hr

Answer 12

Typhoon

Question 13

greather than 220 km/hr

Answer 13

Super Typhoon

Question 14

1
2
3
4
5

Question 15

36
24
18
12
12

Question 16

30-60
61-120
121-170
171-220
greater than 220

Question 17

A weather condition characterized by heavy rain and wind accompanied by lightning, thunder; sometimes with hail and tornadoes.

It can last for 30 minutes to several hours.
It requires moisture and rapidly rising warm air to form.

Answer 17

Thunderstorm

Question 18

key mechanism in thunderstorm formation

Answer 18

Convection

Question 19

rising air

Answer 19

updrafts

Question 20

sinking air

Answer 20

downdrafts

Question 21

clouds
contain

millions of suspended water droplets and ice particles
which continously collide due to

turbulent air currents

Question 22

collisions knock out electros and when sufficiently ionized, air can become

Answer 22

electrically conductive (plasma)

Question 23

while plasma is formed above
the objects on the ground reach out to the clouds by growing electrical discharge called

Answer 23

streamers

Question 24

electrons surge down to meet the streanmers creating

Answer 24

lightning

Question 25

as lightning strikes, the air around it is heated and expands rapidly to the point that it explodes

Question 26

is a shockwave ccaused by this explosion, which manifests as a loud booming sound

Answer 26

Thunder

Question 27

severe thunderstorm

Answer 27

wind gusts of at least 94km/h hail at least an inch in diameter tornado

Question 28

classification of thunderstorm based on structure

Answer 28

single cell thunderstorm multi cell thinderstorm supercell thinderstorm squall line

Question 29

short-lived storm consists of a single updraft-downdraft couplet

Answer 29

single cell thunderstorm

Question 30

system of individual cells that usually lasts for 30 minutes to an hour, while the entire system can last for hours

Answer 30

multi-cell thunderstorm:

Question 31

highly organized thunderstorm with a large rotating updraft and can last for several hours

Answer 31

supercell thunderstorm

Question 32

group of storms arranged in a straight line

Answer 32

squall line

Question 33

gentle warm air suddenly replaced by strong, chilly bursts of wind lightning strikes accompined by deafening thunder and abrupt, intense rain

Question 34

PAGASA begins a thunderstorm watch when thunderstorm formation is likely within the next 12 hours.

Question 35

is issued by PAGASA when there is indication that a thunderstorm is threatening within the next 2 hours.

Answer 35

Thunderstorm advisory