Q1. Answer

The amplitude and speed will decrease. You must have been to the beach at sometime of your life. And at the beach you might have had the leisure to look at the blue wave breaking into fine white foam on the sand, You might also have anticipated the amplitude of the waves decreased and the wave seems to lose its strength on entering land. On such simple observations as these, we can discover answers to these distracting questions.(Nature is a source of knowledge, isn't it?)

Q2. Answer

Trick question. the medium of a wave only vibrates, it doesn't move to anther place entirely. So the answer is 0 meters

1. mechanical waves

2. wavelength

3. transverse wave

4. Amplitude

5. Wave

6. trough

7. frequency

8. longitudinal waves

9. crest