* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download Final Revision
Survey
Document related concepts
Sagnac effect wikipedia , lookup
Faster-than-light wikipedia , lookup
Shear wave splitting wikipedia , lookup
Coherence (physics) wikipedia , lookup
Photoelectric effect wikipedia , lookup
Theoretical and experimental justification for the Schrödinger equation wikipedia , lookup
Speed of sound wikipedia , lookup
Electromagnetic spectrum wikipedia , lookup
Double-slit experiment wikipedia , lookup
Matter wave wikipedia , lookup
Transcript
Second Prep Science Revision Sheet Answer e following questions: Question 1: A- Complete the following: 1- Transverse waves are formed of…………. and……….. 2- Complete oscillation includes ………… successive displacement, each of them is called……… 3- The type of pollination in the same flower is…………and the pollination between two flowers is ………… 4- The first law of sound reflection, the angle ……………….. = the angle of……………………… 5- Sound waves are ……… waves which can not travel through…….. 6- The colored whorl of the flower is called.....…... each leaf is called………. 7- Light reflection is the…………. of light waves in the same medium on a ………… surface. 8- The first law of sound reflection, the angle 2m of……………….. = the angle of……………………… B- From the opposite figure , find: 2 1- Wave length = ………….. 1 2- Frequency = ……………. 3- Amplitude = ……………. 4- Wave velocity = ………….. 0.2sec C- Problem: An oscillating body makes 480 complete oscillations in one minute Calculate: 1- The frequency. 2- Periodic time. C- Calculate: The sound velocity of a tone, its frequency is 264 Hz and its wavelength is 1.3 m. Question 2: A- Choose the correct answer: 1- The male nucleus enters the ovule inside the ovary through the……. a- style b- stigma c- pistil d- micropyle 2- The human ear cannot hear sounds of frequency………… a- 50 Hz b- 30 Hz c- 300 Hz d- 10 Hz 3- The echo can be heard if the distance between the sound source and the reflecting surface is not less than …………… a- 10m b- 17m c- 34m d- 50m 4- Light is reflected…………. when it falls a rough surface. a- regularly b- irregularly c- and refracted d- and scattered 5- The complete oscillation includes ……………displacement (s). a- one b- two c- three d- four 6- Fertilization occurs when ……….. is formed. a- embryo b- zygote c- endometrium d- ovum 7- When the distance between the source of light and the surface of a wall decreases, the light intensity ………. a- decreases b- increases c- is doubled d-remains constant 8- White light is a mixture of………… colors. a- seven b- six c- five d- eight B- Give reasons for each of the following: 1- Petals of corolla are colorful and scented. 2- Bats can locate the position of their prey. 3- Occurrence of mirage phenomenon in desert regions at noon. 4- Anthers of some flowers are hanging. 5-Aluminium foil is an opaque. 6- We see lightning before hearing thunder. 7- Metallic pots are not used in microwave ovens. 8-The ears of fennec fox are big and concave. 9- Fallopian tube is lined with cilia. 10-Palm trees can not t be pollinated by self- pollination. Question 3: A- Put ( √ ) or ( X ) in front of each statement: 1- Ultrasonic waves have frequencies less than 20 Hz. ( ) 2- The movement of the pendulum is considered as a wave motion. ( ) 3- Intensity of sound increases by increasing the distance between the sound source and the ear. ( ) 4- The ovum developed to be a fruit. ( ) 5-The wall of the ovary after pollination forms the coat of the fruit. ( ) 6- Light travels through transparent media in straight lines. ( ) 7- The movement of a simple pendulum is a wave motion. ( ) 8- Ultrasonic waves have frequencies more than 20000 Hz. ( ) B- What is meant by: 1- The wave length of a sound wave is 2 m. 2- The refractive index of glass is 1.5. 3- Angle of reflection of a light ray is zero. 4- Absolute refractive index of water is 1.33. Question 4: A- Write the scientific term for each of the following: 1- It is the ability of the medium to refract light. 2- Repetition of the original sound due to its reflection. 3- Motion which is repeated regulary in equal periods of time. 4- The reproduction of some plants by parts of roots, stems or leaves. 5- Distance that is travelled by sound in one second. 6- Medium that dose not let light to pass through. 7-The waves which need medium to propagate through. 8-The reproduction of some plants by parts of roots stems or leaves. B- Define: 1- Light intensity. 2- Sound reflection. 3- Mirage. 4- Vegetative reproduction. C-Compare between: 1- Electromagnetic waves and Mechanical waves. 2-Transverse waves and longitudinal waves. B-Mention one use for each of the following:1- Ultrasonic waves. 2- Periscope. 3-Triangle prism. 4- Flower's calyx.