1Which is an example of a longitudinal wave?
2Which statement is true of a wave with a higher frequency?
3Which group of waves is arranged in order of increasing wavelength?
4Which electromagnetic wave is used in a TV remote control?
5A person injured in a road accident shows only minor wounds on the head from outside. Which technique is suitable for a detailed examination of that person's brain?
6Which sentence correctly relates ultrasonography and X-ray imaging?
7Write the differences between a longitudinal wave and a transverse wave.
8Write the differences between an electromagnetic wave and a mechanical wave.
9Write the differences between traditional X-ray photography and a CT scan.
10Write the differences between infrared waves and ultraviolet waves.
11The wave produced by tying one end of a rope and moving the other end steadily up and down is called a transverse wave. Give the reason.
12People farther from the epicentre of an earthquake feel weaker and weaker shocks as the distance grows. Give the reason.
13In a CT scan, the X-ray source in the machine is arranged so that it can move around the person. Give the reason.
14Although a CT scan can give a detailed three dimensional report of the internal organs, ultrasonography is used to check the condition of a baby in the womb. Give the reason.
15What is a wave?
16Draw the wave produced on the surface of water and the sound wave that spreads when we speak. Label the terms related to both waves.
17What is the electromagnetic spectrum?
18Name the waves with the shortest and the longest wavelength in the electromagnetic spectrum, and write two uses of each.
19A hip is shown once as an X-ray photo and once as a CT scan image. Distinguish which is which.
20State the steps of both check-up techniques, X-ray photography and the CT scan.
21Write the uses of X-ray photography and the CT scan.
22Write any four uses of the reflection of sound.
23Rohan calculated the distance to the neighbour's house directly in front of his own using the reflection of sound. Explain the method.
24Prepare the outline of a security system based on the reflection of sound that you would build by fitting an ultrasound sender, a receiver and the other necessary parts. Draw the system as a sample diagram.
25What is acoustic protection? Write its methods.
26What is ultrasonography? Write its steps and uses.
27Write an essay on the topic of the role of electromagnetic waves in modern life.
28Why does bone look white and the lungs black on an X-ray photo?
29What jobs does the transducer do in ultrasonography?
30Why is a lead apron worn in an X-ray room?