(a) Fig. 4.1 shows a wave on a rope and Fig. 4.2 shows a wave on a spring. Both waves are moving in the direction shown by the arrows. [Figure 4.1] [Figure 4.2]

1. (a)(i)State the name of each of the two types of wave shown. Fig. 4.1 Fig. 4.2[1]
2. (a)(ii)On Fig. 4.1, draw a wave which has a smaller frequency than the wave shown.[1]
3. (a)(iii)Describe the movement of point X on the spring in Fig. 4.2 as the wave passes.[1]
4. (b)Table 4.1 shows some sentences that a student writes about waves. His teacher places a ring around each mistake. Write a suitable correction for each mistake in Table 4.1. One has been done for you. sentence correction Sound travels at 3.0 x 10⁸m/s in air. 330 Sound with a higher pitch has a larger amplitude. X-rays are used for pre-natal scanning. In the electromagnetic spectrum(microwaves have the highest frequency. [Table 4.1][3]

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