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Sam's Last Exam

Total questions: 150

Worksheet time: 6hrs 59mins

Name
Class
Date
1.

The weather layer of the atmosphere is ________.

a)

mesosphere

b)

stratosphere

c)

thermosphere

d)

troposphere

2.

The most abundant gas in the atmosphere is ________.

a)

carbon dioxide

b)

argon

c)

nitrogen

d)

oxygen

3.

In which layer of the atmosphere do cloud formation and precipitation occur?

a)

mesosphere

b)

stratosphere

c)

thermosphere

d)

troposphere

4.

In which layer of the atmosphere do airplanes fly to avoid turbulence?

a)

mesosphere

b)

stratosphere

c)

thermosphere

d)

troposphere

5.

________ is a region of highly ionized, or electrically charged, gases.

a)

mesosphere

b)

thermosphere

c)

troposphere

d)

stratosphere

6.

It is the lowest layer of the atmosphere.

a)

stratosphere

b)

mesosphere

c)

thermosphere

d)

troposphere

7.

In which atmospheric layer is the ozone formed?

a)

mesosphere

b)

stratosphere

c)

thermosphere

d)

troposphere

8.

It is essential to maintain the ozone layer in the atmosphere because it ________.

a)

prevent heat loss from the Earth

b)

mixes the gases in the atmosphere

c)

reflect sun's rays back to the atmosphere

d)

absorb most of the ultraviolet radiation that enters the atmosphere

9.

The layer of the atmosphere from top to down are ________.

a)

stratosphere, mesosphere, thermosphere, ionosphere

b)

thermosphere, mesosphere, stratosphere, troposphere

c)

thermosphere, stratosphere, mesosphere, troposphere

d)

troposphere, mesosphere, thermosphere, stratosphere,

10.

Why is the troposhere called the weather sphere?

a)

The troposhere has the densest air.

b)

There is a high concentration of ozone in this layer.

c)

Clouds, precipitation, and storms forms in the troposphere.

d)

Temperature decreases as altitude increases in the troposhere.

11.

The atmosphere is divided into layers based on ________.

a)

density

b)

weather

c)

temperature

d)

altitude

12.

The atmosphere becomes less dense as altitude increases.

a)

True

b)

False

13.

It is layer of the atmosphere where meteors burn up.

a)

thermosphere

b)

mesosphere

c)

troposphere

d)

stratosphere

14.

It is layer of the atmosphere where aurora borealis is formed.

a)

mesosphere

b)

thermosphere

c)

stratosphere

d)

troposphere

15.

It separates the stratosphere from the mesosphere.

a)

mesopause

b)

tropopause

c)

stratopause

d)

none of the above

16.

It serves as a boundary between the troposphere and the stratosphere.

a)

stratopause

b)

tropopause

c)

mesopause

d)

none of the above

17.

In the thermosphere, temperature increases as altitude increases.

a)

True

b)

False

18.

The temperature in the troposphere increases as altitude increases.

a)

True

b)

False

19.

In which layer do you live?

a)

stratosphere

b)

troposphere

c)

mesosphere

d)

thermosphere

20.

What is the composition of the atmosphere?

a)

70% nitrogen and 30% oxygen

b)

78% oxygen, 21% nitrogen, and 1% other gases

c)

78% nitrogen, 21% oxygen, 0.93% argon, 0.04% carbon dioxide, 0.03 other gases

d)

none of the above

21.

What happens to the temperature as you go higher in the troposphere?

a)

A. It increases.

b)

B. It decreases.

c)

C. It stays the same.

d)

D. It increases then decreases.

22.

Which of the following is considered to be as the coldest layer?

a)

A. Ionosphere

b)

B. Mesosphere

c)

C. Stratosphere

d)

D. Thermosphere

23.

Contains molecules that absorb harmful ultraviolet rays.

a)

Troposphere

b)

Stratosphere

c)

Mesosphere

d)

Thermosphere

e)

All of the above.

24.

In the troposphere, the temperature _____ as altitude increases.

a)

Increases

b)

Decreases

c)

Stays the same

d)

Goes up and down

25.
What is the relationship between altitude and air density within Earth's atmosphere?
a)
As altitude increases, air density decreases.
b)
As altitude increases, air density increases.
c)
As altitude increases, air density remains the same.
d)
There is no relationship between altitude and air density within Earth's atmosphere.
26.
Why does air density decrease with increasing altitude within Earth's atmosphere?
a)
Air density decreases with increasing altitude because more atoms escape into outer space.
b)
Air density decreases with increasing altitude because temperature decreases with increasing altitude.
c)
Air density decreases with increasing altitude because the gravitational pull exerted by the Earth decreases with increasing altitude.
d)
Air density decreases with increasing altitude because energy from the sun pushes the air particles closer to Earth.
27.
What happens to the air pressure (density) of air as you increase in altitude?
a)
density increases, this is due to the surface area of the atmosphere increasing as you increase altitude which allows for gas molecules to expand.
b)
density decreases, this is due to the surface area of the atmosphere increasing as you increase altitude which allows for gas molecules to expand.
c)
density stays the same
d)
density disappears
28.
Which of the following is one of the reasons why air density & air pressure decrease with increasing altitude?
a)
Air density & Air pressure decrease with increasing altitude due to that gravity forces the gases of the troposphere towards the center of the Earth. Thus, gas molecules will be greatest at seal level.
b)
Air density & Air pressure decrease with increasing altitude due to that the surface area of the Earth's atmosphere decreases with increasing altitude, thus gas molecules can spread out. 
c)
Air density & Air pressure increase with increasing altitude. So the following question is worded wrong.
d)
none of the answers are correct
29.

1.     Denser air exerts greater pressure against Earth's surface.

a)

true

b)

false

30.

2.     As you go up the atmosphere there is less air above you to push you down and exert pressure on you. We can say that air pressure is high at a higher altitude.

a)

true

b)

false

31.

5. Air with low density has greater pressure while air with high density has low pressure.

a)

true

b)

false

32.

Changes in air pressure, temperature, humidity, and wind over a long period of time is...

a)

weather

b)

climate

33.

Changes in air pressure, temperature, humidity, and wind over a short time is...

a)

weather

b)

climate

34.

What represent this image?

a)

weather

b)

weather forecast

c)

weather map

d)

front

35.

A weather _____________________ is a prediction about the future weather conditions of a place.

a)

maps

b)

symbols

c)

forecast

d)

data

36.

PAGASA has just raised typhoon signal number two in Cavite and nearby

provinces. What does this mean? Winds____

a)

Winds up to 60 kph may be expected in the locality.

b)

Winds from 61 to 120 kph may be expected within the next 24 hours.

c)

Winds with a speed greater than 121-170 kph are expected in 12 hours.

d)

Winds with a speed of more than 220kph are expected in at least 18

hours.

37.

Which is a description given by PAGASA during public storm signal no.1?

a)

A. There is widespread damage to high-risk structures.

b)

B. Wind speed of 30-60 km/hour may be expected in at least 36 hours.

c)

C. Classes in the elementary and high school level are automatically suspended.

d)

D. Moderate to heavy damage may be experienced particularly in the agricultural and industrial sector.

38.

Which of the following is the effect of very strong winds of public storm warning signal # 4 on the transportation system?

a)

A. Travels by air and sea are cancelled.

b)

B. Travel by sea is allowed but not on the air.

c)

C. Travel by air is allowed but not on the sea.

d)

D. It is safe to travel both by air and on the sea.

39.

Typhoons which are under PSWS # ___ are known to be deadly and destructive.

a)

PSWS #1

b)

PSWS #2

c)

PSWS #3

d)

PSWS #5

40.

Which of the following weather events can have wind speeds exceeding 74 mph (119 km/h)?

a)

Thunderstorm

b)

Tornado

c)

Tropical cyclone

41.

PAGASA has just raised PSWS No. 3 in Metro Manila and neighboring provinces. What does this mean?

a)

Winds up to 60 kph may be expected in the locality.

b)

Winds from 60 – 100 kph may be expected within the next 24 hours.

c)

Winds with a speed of 100 – 185 kph are expected in the area in at least 18 hours.

d)

Winds with a speed greater than 185kph are expected to hit the area in at least 12 hours.

42.

A Typhoon winds with 171—220kph expected within 12 hours. Everyone is advice to be in the evacuation area for those who are in the high-risk area.

a)

Signal No. 1

b)

Signal No. 2

c)

Signal No. 3

d)

Signal No. 4

43.
How is air pressure measured?
a)
Thermometer
b)
Barometer
c)
Psychrometer
d)
Wind vane
44.
What is humidity?
a)
Any form of water that falls from the sky to the ground.
b)
A measure of the transparency of the atmosphere.
c)
The condition of Earth's atmosphere at a certain time and place.
d)
The amount of water vapor in the air.
45.
What is temperature?
a)
The measure of how hot or cold something is
b)
The amount of water vapor in the air compared to the amount of water vapor needed to reach saturation.
c)
Air that moves horizontally, or parallel to the ground.
d)
Evaporation
46.
How is temperature measured?
a)
Wind vane
b)
Thermometer
c)
Barometer
d)
Rain guage
47.
What is precipitation?
a)
Any form of water that falls to Earth's surface from the clouds.
b)
Amount of water vapor in the air.
c)
Force of air molecules pushing on an area.
d)
Wind speed
48.
What is wind?
a)
Air that moves horizontally, or parallel to the ground.
b)
Air pressure
c)
Wind vane
d)
A measure of the transparency of the atmosphere.
49.
What is air pressure? 
a)
How hot or cold something is.
b)
Any form of water that falls to the ground from the clouds.
c)
The force of air molecules pushing on an area.
d)
Air that moves horizontally, or perpendicular to the ground.
50.
How is precipitation measured?
a)
Compass
b)
Anemometer
c)
Rain guage
d)
Thermometer
51.

Why does warm air rise?

a)

Because it's less dense than cold air.

b)

Because it's more massive than cold air.

c)

Because it has a smaller volume than cold air.

d)

Because it has more energy than cold air.

52.

What is the name of the weather instrument that measures the direction of the wind?

a)

Wind Vane

b)

Anemometer

c)

Thermometer

d)

Barometer

53.
As the air temperature increases, the air's capacity for water vapor: 
a)
increases
b)
decreases
c)
remains the same
d)
is unrelated to air temperature and can either increase or decrease
54.
The temperature to which air must be cooled in order to become saturated is the: 
a)

Relative Humidity

b)

Mixing Ratio

c)

Dew Point Temperature

d)

Wet-bulb Temperature

55.
The amount of water vapor in the atmosphere compared to how much it could hold.
a)
Saturation
b)
Vaporicity
c)
Absolute Humidity
d)
Relative Humidity
56.
How does air temperature affect humidity?
a)
warmer air = lower humidity
colder air = higher humidty
b)
temperature does not affect humidity
c)
colder air = lower humidity
warmer air = higher humidity
d)
warm air and cold air = high humidity
57.

What is absolute humidity ?

a)
Absolute humidity is the same as relative humidity
b)
Absolute humidity is the measure of humidity in relation to the temperature of the air
c)
Absolute humidity is the total amount of water vapor present in a unit volume of air.
d)
Absolute humidity is the amount of water vapor in the air compared to the amount it can hold
58.

This phrase means "rain."

a)

Cumulo

b)

Cirrus

c)

Strato

d)

Nimbo

59.

This phrase is referred to as "puffy" or "fluffy."

a)

Cumulo

b)

Cirrus

c)

Strato

d)

Nimbo

60.
Which will most likely form during the condensation process?
a)
rain
b)
hail
c)
clouds
d)
runoff
61.

How are air masses form into clouds? Clouds are form when

a)

cold moist air rises and then cools

b)

warm moist rises, expands and then cools

c)

cold air reaches the lifted condensation level

62.

How does an Cirrus cloud look?

a)

featureless sheets of clouds

b)

low, gray rain clouds

c)

wispy, stringy clouds

d)

puffy, lumpy looking clouds

63.
a)

altocumulus

b)

cumulonimbus

c)

cirrus

64.
a)

stratocumulus

b)

nimbostratus

c)

cumulonimbus

65.
a)

stratus

b)

cumulus

c)

cirrus

66.

What is the direction of the cool sea breeze during a land breeze?

a)

From the land towards the sea

b)

From the sea towards the land

c)

From the sea upwards

d)

From the land downwards

67.

During a land breeze, what causes the air to rise?

a)

The cool air from the sea

b)

The warm land surface

c)

The sun heating the sea

d)

The moon's gravitational pull

68.

What time of day does a land breeze typically occur?

a)

Noon

b)

Evening

c)

Morning

d)

Night

69.
During a land breeze which way does the wind blow?
a)
from the sea to the land
b)
from the land to the sea
70.
During a sea breeze which way does the wind blow?
a)
from the land to the sea
b)
from the sea to the land
71.

What are the two pronounced monsoons in the Philippines?

a)

Luntian and Habagat

b)

Amihan and Habagat

c)

Amihan and Amaya

d)

Alupihan and Bahaghar

72.

We have two wind systems, amihan, and habagat. Which of the following DOES NOT describe amihan?

a)

It brings lots of rain.

b)

It brings cold weather

c)

It comes around July to September.

d)

It comes from the northeast and moves southward.

73.

Which of the following statement is TRUE about habagat?

a)

Amihan is known as the southwest monsoon.

b)

Habagat is known as the northeast monsoon.

c)

From July to October, the habagat comes from the southwest and moves

d)

From October to March the amihan comes from the northeast and moves towards the south.

74.

Why do amihan and habagat bring a lot of rain to the Philippines?

a)

Due to the rotation of the earth.

b)

It is due to the prayers made by farmers.

c)

This is because of the large piece of land near the Philippines.

d)

This is because the wind passes over bodies of water which supply a lot of moisture.

75.

is a belt of low pressure which circles the Earth generally near the equator

a)

PAR

b)

ITZY

c)

ITCZ

d)

Typhoon

76.
Air flows counterclockwise around a
a)
High Pressure System
b)
Low Pressure System
c)
Stable Pressure System
d)
None of the Above
77.

It is a device that uses a laser or other light source to determine the height of a cloud ceiling or cloud

base.

a)

Ceilometer

b)

Hygrometer

c)

Anemometer

d)

Barometer

78.
This tool measures relative humidity.
a)
barometer
b)
anemometer
c)
wind vane
d)
sling psychrometer
79.

This instrument measure the temperature of the air using graphing paper.

a)
Hygrometer
b)
Barometer
c)
Thermometer
d)
Thermograph
80.

An instrument that records the atmospheric pressure in which pen is attached to aneroid cells that will move vertically are there are changes in the atmospheric pressure.

a)
Hygrometer
b)
Thermometer
c)

Barograph

d)
Altimeter
81.

This measures both humidity and air temperatures.

a)

Hygrothermograph

b)
Hydrometer and barometer
c)
Thermometer and anemometer
d)
Barometer and anemometer
82.

An instrument used to measure the height of the base of the clouds.

a)
Thermometer
b)
Anemometer
c)

Ceiling Light projector

d)

Ceiling Balloon

83.

Why do you think weather forecasts are useful?

a)

Weather forecasts are made by meteorologists.

b)

Weather forecasts do not keep people prepared because they are not correct.

c)

Weather forecasts can help predict weather and keep people prepared by knowing what to wear.

d)

Weather forecasts use technology like radar.

84.

A weather _____________________ is a prediction about the future weather conditions of a place.

a)

maps

b)

symbols

c)

forecast

d)

data

85.

What causes damage in a hurricane/typhoon

a)

Winds

b)

Flooding

c)

Strom Surge

d)

all of the above

86.

PAR stands for?

a)

Philippine Area of Restriction

b)

Philippine Autonomy and Responsibility

c)

Philippine Area of Responsibility

d)

Philippine Authority for Responsibility

SHOW ANSWER

87.

PAGASA stands for?

a)

Philippine Atmospheric, Geographical and Astronomical Services Administration

b)

Philippine Atmospheric, Geophysical and Astronomical Services Administration

c)

Philippine Atmospheric, Geophysical and Astrological Services Administration

d)

Philippine Atmospheric, Geophysical and Astronomical Services Authority

88.

Every year, the Philippines experiences at least how many typhoons?

a)

18

b)

20

c)

25

d)

23

89.

Refer to last question, rearrange the tropical cyclones in ascending order.

A. Super typhoon

B. Severe typhoon

C. Typhoon

D. Tropical depression

E. Tropical Storm

F. Severe tropical storm

a)

A > B > C > F > E > D

b)

D < E < F < C < B < A

c)

E > F > D> C > B > A

d)

C > B > A > D > E > F

90.

Government agency that is tasked to monitor and assess any weather disturbances that enter PAR

a)

PAGASA

b)

PHIVOLCS

c)

DEPED

d)

DOH

91.

Typhoon is locally known as ________________________

a)

baha

b)

ulan

c)

bagyo

d)

buhawi

92.

Tropical cyclones in Northwest Pacific Ocean are called ____________.

a)

Typhoon

b)

Hurricane

c)

Cyclone

93.

Tropical cyclones in North Atlantic Ocean and Northeast Pacific are called ____________.

a)

Typhoon

b)

Hurricane

c)

Cyclone

94.

Tropical cyclones in South Pacific and Indian Ocean are called ____________.

a)

Typhoon

b)

Hurricane

c)

Cyclone

95.

Tropical Cyclone with Maximum Speed kph of 118kph are considered ____________.

a)

Tropical Storm

b)

Typhoon

c)

Super Typhoon

96.

Tropical Cyclone with Maximum Speed kph of 220kph

are considered ____________.

a)

Tropical Storm

b)

Typhoon

c)

Super Typhoon

97.

PSWS #2 has a wind speed of ____________ kph.

a)

30 to 60

b)

62 to 120

c)

121 t o170

98.

Public storm warning signal number 3 is raised in Metro Manila. What does it mean?

a)

Cyclone is coming within the next 24 hours with a center wind of 61 – 120 kph.

b)

Cyclone is coming within the next 18 hours with a center wind of 121 – 170 kph.

c)

Cyclone is coming within the next 12 hours with a center wind of 171 – 220 kph.

d)

Cyclone is coming within the next 12 hours with a center wind of more than 220 kph.

99.

A severe tropical storm is reported in the eastern part of the Philippines. How much wind does it have?

a)

45 – 61kph

b)

62 – 88 kph

c)

89 – 117 kph

d)

118 – 220 kph

100.

2. Classes in all levels are suspended and the wind speed of 121-170 kph are expected in 18 hours. The impact of wind is moderate to heavy damage.

a)

A. PSWS No.1

b)

B. PSWS No.2

c)

C. PSWS No.3

d)

D. PSWS No.4

101.

3. Wind speed of 30-60kph is expected within 36 hours. Classes in preschool are suspended. The impact of wind is no damage to very light damage.

a)

A. PSWS No.1

b)

B. PSWS No.2

c)

C. PSWS No.3

d)

D. PSWS No.4

102.

Which way is the wind blowing in this scenario?

a)

from the north

b)

toward the north

c)

from the west

d)

toward the west

103.

Which way is the wind blowing in this scenario?

a)

from the southeast

b)

toward the southeast

c)

from the southwest

d)

toward the southwest

104.

What speed is represented by a triangle?

a)

5 knots

b)

10 knots

c)

50 knots

105.

What speed is represented by a longer line?

a)

5 knots

b)

10 knots

c)

50 knots

106.

What speed is represented by a shorter line?

a)

5 knots

b)

10 knots

c)

50 knots

107.

What speed is represented by 1 shorter line and 1 longer line?

a)

5 knots

b)

15 knots

c)

50 knots

d)

55 knots

108.

What speed is shown in this symbol?

a)

4 knots

b)

20 knots

c)

10 knots

d)

40 knots

109.

What speed is shown when no "flags" come off the line?

a)

0 knots

b)

1-2 knots

110.

What speed is shown in this symbol?

a)

0 knots

b)

100 knots

c)

there is no speed information shown

111.

What percent cloud cover is shown here?

a)

0.1 = 10% (or less)

b)

0.2-0.3 or 20-30%

c)

0.6 = 60%

d)

0.7-0.8 or 70-80%

112.

What percent cloud cover is shown here?

a)

0.1 = 10% (or less)

b)

0.2-0.3 or 20-30%

c)

0.6 = 60%

d)

0.7-0.8 or 70-80%

113.

What percent cloud cover is shown here?

a)

0.1 = 10% (or less)

b)

0.2-0.3 or 20-30%

c)

0.6 = 60%

d)

0.7-0.8 or 70-80%

114.

What percent cloud cover is shown here?

a)

0.1 = 10% (or less)

b)

0.2-0.3 or 20-30%

c)

0.6 = 60%

d)

0.7-0.8 or 70-80%

115.

What does this part of the station symbol indicate?

a)

present weather

b)

air pressure

c)

temperature

d)

wind speed

116.

What does this part of the station symbol indicate?

a)

air pressure right now

b)

precipitation

c)

air pressure TREND (over last 3 hours)

d)

wind speed

117.

What is the air pressure TREND over the last 3 hours?

a)

falling by 23 nb

b)

rising by 23 nb

118.

What is the air pressure TREND over the last 3 hours?

a)

falling by 19 nb

b)

rising by 19 nb

119.

What does this part of the station symbol indicate?

a)

present weather

b)

air pressure

c)

temperature

d)

wind speed

120.

What type of precipitation is shown here?

a)

hail

b)

snow

c)

fog

d)

smog

121.

What type of precipitation is shown here?

a)

sleet

b)

freezing rain

c)

drizzle

d)

hail

122.

What type of precipitation is shown here?

a)

smog

b)

rain showers

c)

snow showers

d)

thunderstorms

123.

What wind speed and direction is shown here?

a)

10 knots from the West

b)

10 knots from the East

c)

20 knots from the West

d)

20 knots from the East

124.

What wind speed and direction is shown here?

a)

5 knots from the NorthEast

b)

5 knots from the NorthWest

c)

10 knots from the NorthEast

d)

10 knots from the NorthEast

125.

What wind speed and direction is shown here?

a)

0 knots from the SouthEast

b)

0 knots from the SouthWest

c)

1-2 knots from the SouthEast

d)

1-2 knots from the SouthWest

126.

What is the temperature for the following station model?

a)

4 ºF

b)

76 ºF

c)

80 ºF

d)

129 ºF

127.

What is the dewpoint for the following station model?

a)

10 ºF

b)

23 ºF

c)

65 ºF

d)

75 ºF

128.

What is the barometric pressure for the following station model?

a)

87 mb

b)

998.7 mb

c)

1098.7 mb

d)

1098 mb

129.

What is the amount of cloud cover for the following station model?

a)

25%

b)

50%

c)

75%

d)

100%

130.

What is the wind direction

a)

Northeast

b)

Northwest

c)

Southeast

d)

Southwest

131.
What is the cloud coverage at this station?
a)
Not cloudy
b)
Partially cloudy
c)
Overcast
d)
Stormy
132.
What is the wind speed at this weather station
a)
2 knots
b)
10 knots
c)
20 knots
d)
25 knots
133.
What is the wind direction at this station
a)
Wind is blowing to the west
b)
Wind is blowing from the north
c)
Wind is blowing to the Northwest
d)
Wind is blowing from the Northwest
134.

What is the cloud cover?

a)

clear skies

b)

partly cloudy

c)

mostly cloudy

d)

stormy

135.

Choose the best forecast for this model.

a)

It is an overcast day with little wind and temperature of 37

b)

It is a slightly cloudy day, with rain falling and wind coming from the southwest.

c)

It is a blizzard outside, heavy winds, low temperatures, and lots of snow.

d)

The sun is shining and there are no clouds in the sky.

136.

Choose the correct forecast based on this model.

a)

It is an overcast day, with a 61 degree temperature, and no wind

b)

It is a party cloudy day, with a 75 degree temperature and 25 knots of wind.

c)

It's a stormy day with a temperature of 987.

d)

It's a Wednesday and the temperature is positive 11

137.

Choose the best forecast for this station model

a)

It's an overcast day with wind coming from the northwest at 20 knots, and snow is falling.

b)

Its a warm day, with little wind, and no precipitation.

c)

A heavy wind is blowing from the southeast and thunderstorms are expected.

d)

It's an overcast day, with high temperatures and low air pressure.

138.

What is the temperature in degree Fahrenheit?

(a)  

139.

What is the dewpoint in degrees Fahrenheit?

(a)  

140.

What is the visibility in miles?

(a)  

141.

What is the present weather?

(a)  

142.

What is the cloud cover %?

- The answer should be a number

(a)  

143.

What is the wind direction?

(a)  

144.

What is the wind speed?

(a)  

145.

What is the barometric pressure?

(a)  

146.

How much precipitation has fallen in the last 6 hours?

(a)  

147.

On which station model would the present weather symbol * most likely be found?

a)
b)
c)
d)
148.

Which station model shows the correct form for indicating a northwest wind at 25 knots and an air pressure of 1023.7 mb?

a)
b)
c)
d)
149.

What is the present weather?

(a)  

150.

What is the cloud cover %?

(a)