WS 1 P.2-7

Question 1

what kind of pressure system does a typhoon belong to?

Answer 1

a low-pressure system.

Question 2

what are the conditions required for the development of a typhoon?

Answer 2

warm ocean water of ≤ 26.5°C
still, smooth surface
abundant supply of water

Question 3

what makes a typhoon die down?

Answer 3

insufficient water

friction with building and mountains on land

Question 4

what is the effect of how a typhoon rotates around their centres called?

Answer 4

Coriolis effect.

Question 5

Why does a typhoon rotate around its centre?

Answer 5

This is because of the Earth’s rotation.

Question 6

What is the centre of a typhoon called?

Answer 6

an eye

Question 7

The pressure is the _______________ in the eye.

Answer 7

lowest

Question 8

typhoons rotate ________________/________________ in the ________________/________________ hemisphere.

Answer 8

clockwise, southern; anti-clockwise, northern

Question 9

what are the stages of a typhoon?

Answer 9

origin—>mature—>dissipation

Question 10

how were our daily lives affected when Typhoon Hato stroke Hong Kong?
—losses
—flight
—suspension
—disrupted
—triggered
—caused
—disrupted
—caused

Answer 10

losses of major sectors
flight cancellations
suspension of public transport
disrupted power supplies
triggered secondary hazard
caused trees to fall, which blocked roads and stopped traffic
disrupted economic activities
caused death and injuried

Question 11

warning signals that may be issued under a typhoon’s influence:
—
—
—
—
—
—

Answer 11

typhoon no. 1/3/8/9/10
special announcement of flooding in the northern New Territories
thunderstorm warning signal
landslip warning signal
rainstorm warning signals (amber/ red/ black)

Question 12

Typhoons are a type of ________________ natural hazard.

Answer 12

climatic

Question 13

negative impacts of rainstorms:
—
—
—

Answer 13

traffic congestion (disrupts traffic)
causes flooding
landslides

Question 14

negative impact of typhoons:
—
—
—
—

Answer 14

disrupts economic activity;
transport and people’s daily lives
causes injuries, and loss of life and property
triggers other natural hazards

Question 15

‘weather’ refers to ________________ ________________, while ‘climate’ refers to ________________ ________________, like ________________

Answer 15

shorter periods

longer periods, seasons’

Question 16

please name the key elements of weather and climate. (10 in total)

Answer 16

relative humidity
amount of sunlight
air pressure
wind direction
wind speed
precipitation type
precipitation amount
temperature
extras:
air quality
UV index

Question 17

what does the Hong Kong Observatory do?

1. provide
2. issue
3. monitor
4. educate

Answer 17

—the public, the government, the airport and the harbour with accurate information about weather conditions.
—warning signals under extreme weather conditions
—and record the weather conditions
—the public on weather related issues

Question 18

Why is it necessary to set up the Hong Kong Observatory?
—
—

Answer 18

to safeguard our life and property

to minimise disruptions to economic and social activities during inclement weather

Question 19

name the 9 common warning signals issued by the Hong Kong Observatory.

Answer 19

thunderstorm warning signal, landslip warning signal, special announcement on flooding in the northern new territories, very hot weather warning, cold weather warning, red rainstorm warning signal, typhoon signal number 8, yellow fire danger warning signal, strong monsoon warning signal

Question 20

action to be taken in the presence of the thunderstorm warning signal:

Answer 20

avoid or cancel outdoor water sports.

Question 21

action to be taken in the presence of the landslip warning signal:

Answer 21

people should avoid walking or driving close to steep slopes

Question 22

action to be taken in the presence of the special announcement on flooding in the northern new territories:

Answer 22

stay away from low-lying areas.

Question 23

action to be taken in the presence of the very hot weather warning:

Answer 23

avoid exposure under the sun for too long.

Question 24

action to be taken in the presence of the cold weather warning:

Answer 24

put on more clothes.

Question 25

action to be taken in the presence of the red rainstorm warning signal:

Answer 25

stay at home or remain in a safe, dry shelter.

Question 26

action to be taken in the presence of the typhoon signal number 8:

Answer 26

secure all windows and move potted plants indoors.

Question 27

action to be taken in the presence of the yellow fire danger warning signal:

Answer 27

do not set up fire in the wild.

Question 28

action to be taken in the presence of the strong monsoon warning signal:

Answer 28

secure loose objects outdoors.

Question 29

what does a weather chart do?

Answer 29

it displays various weather conditions over a particular area at a particular time.

Question 30

how is the temperature of a city/ area shown in a weather chart?

Answer 30

shown by the number next to the city.

Question 31

how is the precipitation of a city/ area shown in a weather chart?

Answer 31

shown by different symbols:
— • rain
—， drizzle
—∇ showers
—✽snow
—☈ thunderstorm
—∞ haze
—=mist
—☰fog

Question 32

how is the air pressure of a city/ area shown in a weather chart?

Answer 32

shown by isobars, which are black lines joining places with the same air pressure on the chart.

Question 33

how is the wind of a city/ area shown in a weather chart? how do we differentiate the direction it is pointing to?

Answer 33

shown by arrow-like symbols; the feathers are always on the right.

Question 34

note:

Answer 34

remember to revise the arrow symbols + format of stating the weather conditions of a city in evernote!!

Question 35

what do people use to measure and record the duration of sunshine? what is the unit?

Answer 35

sunshine recorder, hour

Question 36

what do people use to measure and record the direction of wind? what is the unit?

Answer 36

wind vane; NWSE

Question 37

what do people use to measure and record the relative humidity? what is the unit?

Answer 37

wet and dry bulb thermometers/ psychrometer; %

Question 38

what do people use to measure and record air pressure? what is the unit?

Answer 38

barometer; hPa (hectopascals)

Question 39

what do people use to measure and record air temperature? what is the unit?

Answer 39

a thermometer; °C (degrees celcius/ centigrade)

Question 40

what do people use to measure and record wind speed? what is the unit?

Answer 40

anemometer; m/s (metres per second)

Question 41

what do people use to measure and record the precipitation? what is the unit?

Answer 41

rain gauge; mm (millimetres)