Module in

Science and Technology IV

Submitted by

John Roland F. PejiLemuel G. TatadMark C. Tawiran

Submitted toMrs. Niña P. Espineli

Adviser

1. He used Electromagnetic waves in communicationa. Guglielmo Marconi b. Heinrich Hertzc. James Clerk Maxwell d. Donald Keck

2. Transoceanic Communication can be applied to this appliance which use both AM and FM for pictures and audio.a. Microwave b. Televisionc. Radio d. Speakers

3. Heinrich Hertz lead the start of wireless communication through the following except:a. Made a wireless telegraph to transfer messages to other placesb. EM induction happens in space with no conductor in betweenc. described a wave consisting of changing electric and magnetic fieldsd. Showed the existence of EM Waves

4. Which of these is the right track of the transoceanic communication?a. Operator – lines – tower – sea – tower – amplifier – line – operatorb. line – tower – amplifier – sea – operator – lines – tower – operatorc. operator – amplifier – line – tower – sea – tower – amplifier – lined. none of the above

5. Which can be the most efficient of the means of transoceanic communication that is made from thin glass?a. electric wires b. satellitec. radio waves d. fibre optics

6. The following are some applications of wireless communication except:a. International Direct Dialing b. Internet callingc. Street light connection d. Live news coverage

7. Because of the distance of the two telephone subscriber, how many times do the voice is amplified during the process?a. 4 only b. 3 onlyc. 2 only d. 1 only

8. This is the wire that connects the telephone subscriber to the central offices that leads to the communication towers.a. drop wires b. electric wiresb. live wires c. none of the above

9. The pioneer for the wireless communication.a. James Clerk Maxwell b. Guglielmo Marconic. Heinrich Hertz d. All of the above

10. This communication uses electromagnetic waves or any medium to send signals above the water-forms.a. Electronic b. Both A and Cc. Transoceanic d. None of these

HISTORY

Heinrich Hertz (1857 – 1894)

He is a German Physicist who proved the existence of Radio Waves.

He made two circuits. The first circuit has a gap and connected to a high voltage source.The second circuit has a simple conductor bent into a circle with small gap between its end.He observed that whenever sparks were produced at circuit A, sparks were also observed at B. And it s observed even circuits weretwo meters apart.

Energy from the first spark was propagated through the air and received by the second and this energy is called Electromagnetic Waves.

High Voltage

Heinrich Hertz’ experiment

James Clerk Maxwell (1831 – 1879)

Maxwell based his hypothesis on the finding of Oersted and Faraday.He proved the existence of Electromagnetic Waves. He hypothesized that EM induction also happens in space even there’s no actual conductor present.

Marconi is an Italian who developed the first wireless telegraph. He used the experiment of Heinrich Hertz to communication when he sent messages to few kilometers using a spark gap transmitter and a simple receiver which indicated the presence of a signal by clicks in a telephone earpiece in 1896. In 1901, he used this system to receive Morse signals across Atlantic.

Guglielmo Marconi (1874 – 1937)

Means

Radio wavesFibre Optics-These are strands of opticallypure glass about the diameter of ahuman hair. -It is used in telephone systems, TV and internet.

Satellites Neutrions

Activity 1Fill in the blanks: complete all the sequence of transoceanic

communication.???

From the telephone operator your voice is sent by the line wire to the transmitting station.

???

???

At the other side, a receiving station picks up your voice.

???

1

2

3

4

5

6

7 But is amplified again.

Then it is sent by line wire.8

???

???

9

10

Activity 2Loop A word: Find 5 words About transoceanic

communication

H E I N R I C H H E R T Z E A R C A N G

F H I J K L M N O S F H J K L Z Q X C U

A S A T E L L I T E D F J A C K A R L G

S S L E I B S T A D O L F H I T A L E L

R P Z G R E N D I V G R O ß D D E U T I

S C H L A N D Ñ F H S A K L I P J O P E

D D N R F R G S H I N A N O M U S A S L

H I E Y A M A T O Y A H A G I K Ñ I D M

O U U B U T A I Z E R O S E N N O H I O

K O T D A N I S E Ñ Y U S O S E N T A M

I R R Y U J O Y O S U N O H I K O D A A

N S I U Z U Y A I O S H I M A T A K A R

Ñ O N I B U K I G H J D S A H I O V Q C

S E O N S R E B I F L A C I T P O U I O

K A S N T A I O K A D A K E I S U K E N

D V O R A S H I M R I T R O M A C H S I

I A F F R E E D O M I N D E P E N D E C

N C E V I C T O R Y L I B E R T Y S D U

1. He used Electromagnetic waves in communicationa. Guglielmo Marconi b. Heinrich Hertzc. James Clerk Maxwell d. Donald Keck

2. Transoceanic Communication can be applied to this appliance which use both AM and FM for pictures and audio.a. Microwave b. Televisionc. Radio d. Speakers

3. Heinrich Hertz lead the start of wireless communication through the following except:a. Made a wireless telegraph to transfer messages to other placesb. EM induction happens in space with no conductor in betweenc. described a wave consisting of changing electric and magnetic fieldsd. Showed the existence of EM Waves

4. Which of these is the right track of the transoceanic communication?a. Operator – lines – tower – sea – tower – amplifier – line – operatorb. line – tower – amplifier – sea – operator – lines – tower – operatorc. operator – amplifier – line – tower – sea – tower – amplifier – lined. none of the above

5. Which can be the most efficient of the means of transoceanic communication that is made from thin glass?a. electric wires b. satellitec. radio waves d. fibre optics

6. The following are some applications of wireless communication except:a. International Direct Dialing b. Internet callingc. Street light connection d. Live news coverage

7. Because of the distance of the two telephone subscriber, how many times do the voice is amplified during the process?a. 4 only b. 3 onlyc. 2 only d. 1 only

8. This is the wire that connects the telephone subscriber to the central offices that leads to the communication towers.a. drop wires b. electric wiresb. live wires c. none of the above

9. The pioneer for the wireless communication.a. James Clerk Maxwell b. Guglielmo Marconic. Heinrich Hertz d. All of the above

10. This communication uses electromagnetic waves or any medium to send signals above the water-forms.a. Electronic b. Both A and Cc. Transoceanic d. None of these

Answers

Physics Science and Technology Textbook for Fourth Year. 2004. p. 386

www.google.com.ph

Source(s):

Pre-test/Post test1. A 2. B 3. A 4. A 5. D6. C 7. C 8. A 9. D 10. C

Activity1. A 2. B 3. A 4. A 5. D6. C 7. C 8. A 9. D 10. C

H E I N R I C H H E R T Z E A R C A N G

F H I J K L M N O S F H J K L Z Q X C U

A S A T E L L I T E D F J A C K A R L G

S S L E I B S T A D O L F H I T A L E L

R P Z G R E N D I V G R O ß D D E U T I

S C H L A N D Ñ F H S A K L I P J O P E

D D N R F R G S H I N A N O M U S A S L

H I E Y A M A T O Y A H A G I K Ñ I D M

O U U B U T A I Z E R O S E N N O H I O

K O T D A N I S E Ñ Y U S O S E N T A M

I R R Y U J O Y O S U N O H I K O D A A

N S I U Z U Y A I O S H I M A T A K A R

Ñ O N I B U K I G H J D S A H I O V Q C

S E O N S R E B I F L A C I T P O U I O

K A S N T A I O K A D A K E I S U K E N

D V O R A S H I M R I T R O M A C H S I

I A F F R E E D O M I N D E P E N D E C

N C E V I C T O R Y L I B E R T Y S D U