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# Checking... wave quest

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### Checking... wave quest

1. 1. Wave Quest Checking the...
2. 2. Types of Waves <ul><li>Sound </li></ul><ul><li>Water </li></ul><ul><li>Earthquake </li></ul><ul><li>Microwave </li></ul><ul><li>String </li></ul><ul><li>Radio </li></ul><ul><li>Sine </li></ul><ul><li>Cosine </li></ul><ul><li>Visible light </li></ul><ul><li>Telephone </li></ul><ul><li>Slinky </li></ul><ul><li>Stadium (Arena) </li></ul>
3. 3. Wave Quest What is a wave? A wave is a disturbance that travels through a medium from one location to another.
4. 4. Wave Quest What is a medium? A medium is a substance or material which carries a wave Ex: slinky coils, water, air, earth
5. 5. Waves and Softballs <ul><li>Similar: Energy is transferred from batter to the bat to the ball </li></ul><ul><li>Different: Waves don’t transport matter </li></ul>
6. 6. Wave Quest When observing a duck on a lake, why does the duck not move toward shore with the waves?
7. 7. Wave Quest As the wave travels, the water is not transported to the shore, and the duck is resting on the water. The water wave only transports energy, not matter (in this case water).
8. 8. Wave Quest A wave can be described as a disturbance which travels through a medium , transporting energy from one location to another without transporting matter .
9. 9. Wave Quest One way to categorize waves is by the direction of movement of particles. Waves can be categorized into three groups using this method.
10. 10. Wave Quest Transverse Waves Ex: Water waves Move perpendicular
11. 11. Wave Quest Longitudinal Wave Ex: Sound Move parallel
12. 12. Wave Quest Which types of waves can travel through solids? Both transverse & longitudinal can!
13. 13. Wave Quest Which type of waves can travel through liquids? Only longitudinal waves can!
14. 14. Wave Quest What evidence do seismologists have that leads them to believe the Earth’s core is a fluid?
15. 15. Wave Quest Since only longitudinal waves travel through the interior of Earth, scientists have concluded that the Earth’s interior must be liquid.
16. 16. Wave Quest Surface waves move in a circular or Clockwise pattern.
17. 17. Raleigh Surface Waves These waves move in a COUNTER clockwise pattern
18. 18. Wave Quest Diagram of a transverse wave
19. 19. Wave Quest What is the crest of a wave? The highest point on a wave (or the maximum positive displacement from the rest)
20. 20. Wave Quest What is the trough of a wave? The lowest point on a wave (or the maximum negative displacement from rest)
21. 21. Wave Quest What is the amplitude of a wave? The greatest distance from rest (surface area to the Crest)
22. 22. Wave Quest What is wavelength? The length of one complete wave cycle (the distance between two consecutive, similar points on a wave)
23. 23. Wave Quest What is the frequency of a wave? How often particles in the medium vibrate when a wave passes through the medium, or….
24. 24. Wave Quest What is the frequency of a wave? (Part 2) … The number of waves that pass a certain point in a given amount of time.
25. 25. Wave Quest What is the period of a wave? Period is the time to complete one wave cycle.
26. 26. Wave Quest  Frequency refers to how often something (a wave) happens.  Period refers to the time it takes something (a wave) to happen.
27. 27. Wave Quest What is an echo ? A echo is a sound wave that is reflected, or bounces back.
28. 28. Speed of an echo 340 m/s 2 170 meters x 2
29. 29. Wave Quest Speed of a Wave = Wavelength ÷ Period or Wavelength x Frequency
30. 30. Wave Quest How is a sound wave created? A sound wave is created by a vibrating object.
31. 31. Wave Quest Through what medium does sound usually travel? Air, but sound can travel through anything else… steel, water, etc.
32. 32. Wave Quest What type of wave is a sound wave? Why? Sound is a mechanical wave, which means it requires a medium through which to travel…
33. 33. Wave Quest What type of wave is a sound wave? Why? (Part 2) … As opposed to an electromagnetic wave, which does not need a medium (ex: light)…
34. 34. Wave Quest What type of wave is a sound wave? Why? (Part 3) … Sound is also classified as a longitudinal wave because the energy from the sound waves compresses the medium as it travels.
35. 35. Other Terms to Know <ul><li>Refraction : A waves bends to a change of speed (ex. Light moving into thicker glass) </li></ul><ul><li>Compression : in a longitudinal wave the place where there are MORE particles </li></ul><ul><li>Rarefaction : in a longitudinal wave the place where there are LESS particles </li></ul><ul><li>Incident ray : when a wave is reflected: this is the ORIGINAL wave </li></ul><ul><li>Reflected ray : when a wave bounces back this is the result </li></ul>
36. 36. Wave Quest FINI