مذكرة ساينس الصف الثانى الاعدادى الترم الثانى 2022 ، ملخص Science تانية اعدادى ترم ثانى 2022 ، منهج ساينس الصف الثانى الاعدادى 2022 ترم ثانى ، كتاب علوم بالانجليزى ترم ثانى 2022 ، مذكرة ساينس تانية اعدادى ترم ثانى pdf
منهج ساينس تانية اعدادى ترم ثانى 2022
موضوعات متعلقة
تحميل مذكرة Science الصف الثانى الاعدادى الترم الثانى 2022
مذكرة ساينس
Science
الصف الثانى الاعدادى
الترم الثانى 2022
16صفحةبصيغة pdf
جوجل درايف
من اعداد / احمد الباشا
March Revision
Unit One (Lesson One & Two )
Unit Two (Lesson One )
1- Write the scientific term :
1-The distance covered by the wave in one second
2-Non-audible waves whose frequencies are less than 20 Hz.
3-Maximum displacement of the oscillating body away from its rest position.
4-The measuring unit of noise intensity.
5-It is a disturbance in which the particles of the medium vibrate along the direction of wave propagation.
6-The motion produced as a result of the vibration of the particles
of the medium at a certain moment in a definite direction.
7-The characteristic by which the human ear can distinguish between sounds from different sources even if they are equal in intensity and pitch.
8- It is an external stimulus that affects the ear and causes hearing.
9-A tool is used to determine the pitch of an unknown tone.
10-The property of sound by which the human ear can be distinguish between sharp and harsh sounds
11-The number of complete oscillations produced by the oscillating
body in one second.
12-The time taken by the oscillating body to make one complete oscillation.
13-The highest point in the transverse wave.
14-The measuring unit of sound intensity
15- Waves that need medium to travel and can't travel
16-A property by which the human ear can distinguish between " strong and weak sounds.
2-Choose the right answer:
1- All the following are from the factors affecting sound intensity except the
a. amplitude. b. frequency. c. density of medium. d. wind direction.
2- Sound wave of frequency 400 Hz and wavelength 85 cm, so its velocity
a. 340 m/s. b. 34000 m/s. c. 3.4 m/s. d. 0.034 m/s.
3- The amplitude of the simple pendulum is ........... of a complete vibration.
a. four times. b. a quarter. c. a half. d. double.
4- Light waves are ............ waves.
a. mechanical transverse b. electromagnetic longitudinal
c. electromagnetic transverse d . mechanical longitudinal
5- A sound wave travels in air with velocity 330 m/s and has a wavelength of 0.1 m, its
frequency is ..............
a. 330 KHz b. 3300 Hz. c. 33 KHz. d. 330 Hz.
6- Sound of frequency 200 Hz is ............ than the sound of frequency 100 Hz.
a. sharper b. stronger c. harsher d. weaker
7- weaker When the distance between the source of light and the surface of a wall is doubled, the light intensity on the surface ................
a. decreases to quarter. b. increases to double
c. remains constant. d. no correct answer.
8- The human ear can distinguish sounds of frequency ................
a. 50 KHz. b. 30 KHz. c. 300 KHz. d. 50 Hz.
9- Speed of ball of simple pendulum ............... as we move away from the rest position
a. doesn't affect b . decreases c. is doubled d. no correct answer
10- If the distance between the center of the third compression and that of the fifth
compression is 20 cm, the wavelength of this wave is ......
a. 40 cm. b. 20 cm. c. 10 cm. d. 5 cm.
11- The distance between two successive compressions is called ................
a. frequency. b. periodic time. c. wavelength. d. velocity.
12- If the frequency of an oscillating body is 10 Hz, so the periodic time is .............
a. 10 sec. b. 0.01 sec. c. 0.1 sec. d. 1 sec.
13- Sound of frequency 200 Hz is ................ than sound of frequency 100 Hz.
a. sharper b. stronger c. harsher d. weaker
14- The human ear can distinguish sounds of frequency ................
a. 50 KHz. b. 50 Hz. c. 30 KHz. d. 30000 KHz.
3-Complete the following:
1. ................ Waves are used in breaking the stones of kidneys and ureters.
2. Sharp tones have ................. frequencies, while rough tones have ................. frequencies.
3. The crest in the ................. wave is equivalent to the ................. in the longitudinal wave.
4. Transverse wave consists of ................ and ............
5. The human ears can't detect the sound waves of frequencies less than .......... and that of frequencies more than .....
6. The frequency of sonic waves ranges between ............. Hz to .................KHz.
7. The voice of women is .............. pitched, while the voice of men is ................ pitched.
8. Sound ................. is the property by which the ear can distinguish between harsh and sharp sounds.
9. Waves are classified according to the ability to propagate and transfer energy to ........and ................. waves
10. Complete oscillation consists of ................. displacements (amplitudes).
11. Savart's wheel is used to determine the ................. of an unknown tone.
12. The measuring unit of noise intensity is ................ , while ................ is the measuring unit of the amplitude.
13. As the amplitude increases, the sound intensity ...
14. Infrasonic waves are sound waves of frequencies less than ............... Hz
15. Sound wave velocity = ................. X........
16. Sound travels through air as pulses of ................ and ...............
17. ................. are transverse waves, while ................. waves may be longitudinal or
18. Sharp tones have ................. frequency, while rough tones have ................. frequency.
19. Sounds can be classified into two groups, musical tones of ................. frequency and noises of ................. frequency
(4) Correct the underlined words:
1- Sound pitch is increased by decreasing the frequency (.......... )
2- The crest in the transverse wave is equivalent to the bottom in the longitudinal wave (............)
3-The movement of the clock pendulum is an example of wave motion(.......... )
4- The sound intensity decreases, when the source of sound touches an empty box (...........)
5- Sonic waves are used in sterilization of milk.(.......)
(5) Give reason for:
1. The periodic time decreases as the number of complete oscillations increases.
.......................................................................................................................................
2. The use of ultrasonic waves in milk sterilization
.......................................................................................................................................
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