Physical Science Class

1. Physical Science Class Today’s Topics: Waves and Wave Properties

2. To begin class..Open your Science Notebooks • What do you think of when you hear the word wave? • Write a brief description in yourscience notebook of what you think a wave is

3. How can we describe a wave? • A Wave is disturbance that transfers energy from 1 place to another

4. Let’s Review Key Terms • Medium: the matter a wave passes through • Amplitude (height): the distance a medium rises or falls from its resting point • Wavelength: the distance from any 1 point on a wave to an identical point on the next weave. This measures the length of 1 cycle

5. Image source: http://www.physicsclassroom.com/class/waves/Lesson-1/Categories-of-Waves

6. Longitudinal vs. Transverse Waves • Let’s view a simulation • http://www.animatedscience.co.uk/blog/wp-content/uploads/focus_waves/tl-wave.html

7. Surface Waves A combination of transverse and longitudinal. An example is an Ocean Wave: As a wave travels through the medium (water), the particles of that medium travel in clockwise circles. As a wave heads into shore, the top of the wave is free but the bottom of the wave becomes constricted, causing the wave´s crest to build. Eventually the water is unable to support the wave and it breaks

8. Let’s watch and see how a wave’s crest builds… • http://news.bbc.co.uk/2/hi/4136289.stm • This shows a simulation on how a tsunami is formed You Tube has many videos of the 2004 Tsunami waves and the destruction

9. Parts of a Wave • The wavelength, λ, of a wave is the distance from any point on one wave to the same point on the next wave along Image courtesy of: http://www.bbc.co.uk/bitesize/standard/physics/telecommunications/communication_using_waves/revision/5/

10. Parts of a Wave • The amplitude, a, of a wave is the distance from the centre line (or the still position) to the top of a crest or to the bottom of a trough. Measured in meters

11. Parts of a Wave • The frequency, f, of a wave is the number of waves passing a point in a certain time. We normally use a time of one second, so this gives frequency the unit hertz (Hz), since one hertz is equal to one wave per second

12. Video - Parts of a Wave • http://safeshare.tv/w/SkYbVfMRpv

13. Who Wants to be a Millionaire? Let’s Play!! Waves Review and Practice

14. energy light matter water Is this your Final Answer? Yes No Question 1?A wave is a disturbance that transfers ______ from 1 place to another

15. Ocean, land, water Compression, longitudinal, surface Transverse, surface, compression Longitudinal, transverse, surface Is this your Final Answer? Yes No Question 2?Name the 3 types of waves $100

16. feet yards meters Meters/seconds Is this your Final Answer? Yes No Question 3?How is amplitude measured in units? $200

17. amplitude wavelength frequency meters Is this your Final Answer? Yes No Question 4?The distance crest to crest is: $500

18. inches second hour minute Is this your Final Answer? Yes No Question 5?1 hertz is equal to 1 wave per _________ $1000

19. Compression waves Longitudinal waves Transverse waves Surface waves Is this your Final Answer? Yes No Question 6?Ocean waves are _______ $5000

20. Up and down circular Side to side longitudinal Is this your Final Answer? Yes No Question 7?Transverse waves move: $10,000

21. 1 minute A certain time 1 hour Meters per second Is this your Final Answer? Yes No Question 8?Frequency of a wave is the # of waves passing a point in: $50,000

22. height Hertz/second hertz horsepower Is this your Final Answer? Yes No Question 9?Hz stands for $100,000

23. matter soil air medium Is this your Final Answer? Yes No Question 10?The matter a wave passes through is: $50,000

24. Wrong Answer Wrong Answer Correct Answer Wrong Answer Is this your Final Answer? Yes No Question 11? $1,000,000

25. A B C D Poll the audience ? C B D A ? ? ?

26. Phone a friend

27. 50 / 50