WIND SPEED AND DIRECTION

Modified In‐School Off‐School Approach Modules (MISOSA) 

Distance

Education

for

Elementary

Schools

SELF

‐

INSTRUCTIONAL

MATERIALS

WIND SPEED AND DIRECTION

Department of Education 

BUREAU

OF

ELEMENTARY

EDUCATION

2nd Floor Bonifacio Building  DepEd Complex, Meralco Avenue  Pasig City 

S

C

I

E

N

C

E

4

Revised 2010

by

the

Learning

Resource

Management

and

Development

System

(LRMDS),

DepEd

 ‐ 

Division

of

Negros

Occidental

under

the

Strengthening

the

Implementation

of

Basic

Education

in

Selected

Provinces

in

the

Visayas

(STRIVE).

  This edition has been revised with permission for online distribution 

through the Learning Resource Management Development System (LRMDS) Portal 

(http://lrmds.deped.gov.ph/) under Project STRIVE for BESRA, a project supported 

by AusAID.  

Section 9 of Presidential Decree No. 49 provides:

“No copyright shall subsist in any work of the

Government of the Republic of the Philippines. However,

prior approval of the government agency or office wherein

the work is created shall be necessary for exploitation of

such work for profit.”

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Study the record of the weather below. Answer the questions that follow. Do it your notebook.

Date Feb. 3 Feb. 4 Feb. 5 Feb. 6 Feb. 7

Day Monday Tuesday Wednesday Thursday Friday

Weather

Drawing Drawing

Temperature 28 °C 33 °C 29 °C 30 °C 22 °C 1. What is the temperature on Feb. 6?

2. How many days during the week are sunny? 3. What was the hottest day of the week? 4. What day was the temperature lowest? 5. What day was the sky overcast?

Have you tried to fly a kite? What kind of weather was it?

Would it help if the wind is stronger? Does wind speed change?

At the end of this lesson, you will be able to:

Record observations of the basic weather elements for a week wind speed and direction

2

A. Do this activity.

A. Do the following activities:

ACTIVITY 1

Go out.

Look for a tree to be observed. Observe it every 10 minutes. Answer the following questions: A. Are the leaves moving?

B. Do they move slowly or fast?

C. From what direction is the wind coming from?

Record your observations in your notebook using the table below.

TIME OBSERVATION

First 10 minutes Question A Question B Question C Next 10 Minutes

Question A Question B Question C Next 10 Minutes

Question A Question B Question C

After analyzing your observations, what can you say about the speed of the wind and its direction?

ACTIVITY 2

Study the model of an improved anemometer. Prepare the following materials:

4 plastic cups, 2 pieces of wood of equal size, nails, knife, scissor 1. Bore hole on the cups enough to fit the wood on it with a knife or

scissor.

2. Attach the cups to each piece of wood. Make sure the paper cup points to one direction.

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3. Nail the two pieces of wood together in the middle into a bigger wood or pole. Bore hole bigger than the nail hole so that the wood can turn easily.

4. Implant the wood or pole on the ground.

5. Color one cup so that you can count the number of turns your cups will make in a minute.

6. Place your improvised anemometer in an open space. 7. Observe how it works.

8. Record your data in your notebook similar to the table below.

Time Wind Speed (No. of turns/minute)

How does your improvised anemometer work?

How does it show wind speed (slow, moderate, strong)?

ACTIVITY 3

Prepare the following materials: thick carboard, plastic straw, nail 1. Get a thick carboard.

2. Cut two arrows of the same size. Be sure to make the tails bigger than the arrow heads.

3. Put a plastic straw between the two arrows.

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5. Staple them together. 6. Insert a long and thin nail

through the straw.

7. Nail it to a pole in the yard. 8. Observe how it works.

How does your improvised wind vane work? How does it tell the direction of the wind?

ACTIVITY 4

Place the 2 instrument outside in an open area. Observe how the 2 improvised instruments work. Record your observations in your notebook.

ACTIVITY 5

Using your improvised anemometer and wind vane observe the speed and direction of the wind for 5 days.

Observe also the general weather condition for that day. Record your observation on the chart in your notebook. Use the symbols.

Calm

Wind Speed:

Slow Moderate Fast or strong

5

6

Weather Condition

- sunny

- cloudy

- windy

- rainy

What to Observe DAY 1 DAY 2 DAY 3 DAY 4 DAY 5

Wind Speed Wind Direction Weather Condition

Answer the following questions on your notebook. 1. What can you say about wind speed for 5 days

2. What can you say about the wind direction for 5 days? Are there changes? 3. On what weather condition is the wind speed great?

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B. READ AND LEARN MORE:

Some jfd

Measuring and Recording Speed and Direction of the Wind

Weathermen gather information about the speed and direction of the wind. They do this to perfect weather. They use instruments to measure wind speed and

directions.

Wind speed is measured by an anemometer. The wind speed is shown by the number of circles or revolutions the anemometer makes in one minute.

At times the anemometer almost does not move. We say that the wind is calm. A slow wind will move the anemometer a little. A moderate wind can turn the cups of the anemometer can make several circles or revolutions. We say that the air is strong or fast.

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NAME SPEED (km/hr)

Calm 0-1

Light Air 2-5

Light Breeze 6-11 Gentle Breeze 12-19 Moderate Gale 20-28 Fresh Breeze 29-38 Strong Breeze 39-49 Moderate Gale 50-61 Fresh Gale 62-74 Strong Gale 75-88 Whole Gale 89-100

Storm 103-117

Hurricane more than 117

A wind vane tells the direction from where the wind is blowing. It is an instrument with an arrowhead and a tail. The wind pushes the tail of the wind vane away. The arrowhead points toward the direction of the wind.

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A. Study the illustrations.

Read the directions and draw on your notebook.

1. Look at the smoke coming out from the lighted lamp. Draw the

direction from where the wind is blowing.

2. Look at the tree. Describe the speed of the wind. Is it slow? Moderate? Strong? Draw the direction of the wind.

Apply It

I learned that:

the speed and direction of the wind changes during the day an anemometer is used to determine the speed of the wind wind may be calm, slow, moderate or fast

wind may also be named after its corresponding speed a wind vane is used to determine the direction of the wind

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3. Here is a picture of a wind vane. Draw the direction from where the wind is blowing.

4. Look at the flag. Is it moving slow or fast?

5. The weather report below shows the weather condition for the day.

Read it carefully and fill in the blanks that follow.

WEATHER REPORT

Metro Manila: Fair weather condition with brief rain showers and

thunderstorm in the afternoon and early evening

Rest of the Country: Northern and Western Luzon will have occasional rain

showers and thunderstorm. Other parts of the country will have fair weather with light winds blowing from the northeast.

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1. The weather condition in Metro Manila is . 2. The wind is blowing from the direction. 3. The speed of the wind is .

4. The general weather condition for the days is . 5. The highest temperature reading is .

B. Complete these statement in your notebook.

1.

2. You were about to go and you observed that the sky was so dark and it was drizzling.

C. Do this at home:

Observe the weather for two days.

Draw the clothes you should wear to prepare for it. Write the possible activities you could do for the day. Do it in your notebook.

The weather today is I can do the following: I can wear the following:

12

A. Study the three weather reports below.

Record on your notebook the wind speed and direction using the table below.

Day Wind Speed Wind Direction

1 2 3

DAY 1

Test Yourself

WEATHER NEWS

Metro Manila will continue to have sunny and cloudy periods. Northern Luzon and the whole of Mindanao will experience cloudy skies with scattered rain showers and isolated thunderstorms. The rest of the country will be sunny and partly cloudy with isolated rainshowers. Range of temperature 23-32 °C. Low tide: 2:03; High Tide: 6:08 PM; Sunrise: 6:24; Sunset: 5:56.

DAY 2

Metro Manila will partly cloudy with light winds blowing from the northeast. Extreme northern and eastern Luzon including the eastern section of Mindanao will experience cloudy skies with scattered rain

showers. Sunrise comes at 6:24, Sunset at 5:56.

DAY 3

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Answer the questions on your notebook.

1. Is there a change in the wind speed from day to day ? 2. What are these changes in wind speed?

3. What is the weather condition on Day 1? Day 3?

4. From what direction is the wind blowing on Day 1? Day 2? Day 3? 5. Is there a change in the wind direction in three days?

6. What are these changes in wind direction? How do they affect the weather conditions?

B.

1. What is the use of a wind vane? 2. What is the use of an anemometer?

3. How would a wind vane and an anemometer help us?

Congratulations for trying your best in

accomplishing this module, try to share the things

you have learned with your classmates and