Catch the Wave

2. Catch the Wave

3. Catch the Wave

4. TAKS Objective 4 The student will demonstrate an understanding of motion, forces, and energy.

5. TEKS 8.7 Science Concepts The student knows that there is a relationship between force and motion. The student is expected to: B. recognize that waves are generated and can travel through different media.

6. Lesson Objectives • The learner will be able to differentiate between the motion of the wave and the motion of the matter carrying the wave. • The learner will identify waves that require a medium to move through and waves that travel through empty space. • The learner will demonstrate that waves carry energy.

7. Lesson Objectives • Students will generate waves that pass through different media. • The student will demonstrate that a wave moves forward while the material through which it passes is displace only slightly and momentarily. • Students will measure wave properties.

8. What students will study • Mechanical waves which require a medium • Longitudinal waves like sound • Transitional waves like ocean waves

9. What students will study • Electromagnetic waves travel though space • Radiation from the Sun produces heat on Earth • Radio waves are captured by a receiver and transformed into mechanical waves

10. Mechanical Waves • L-o-n-g-i-t-u-d-i-n-a-l

11. Mechanical Waves Are caused by the Compression and R a r e f a c t I o n Of the molecules in the medium through which the wave is traveling. An example is:

12. Sound Waves

13. Another mechanical wave Is the transverse wave. The wave travels and the medium moves from side to side.

14. Mechanical Waves • T~r~a~n~s~v~e~r~s~e

15. Waves that travels through space are called

16. Electromagnetic Waves • radio • light • heat radiation • microwaves • X-rays

17. Summary • Waves carry energy from one place to another without the medium moving nearly as far. • Amplitude is the size of a wave. • Wavelength is the distance from one point a wave to a corresponding point on the next cycle. • Period is the time it takes to make one oscillation. • Frequency is how many times in a second a wave wiggles.

18. Summary Continued • There are many kinds of waves. • Mechanical waves are a form of motion in which one part of the object moves relative to another, rather than an overall motion of the object from one place to another. • All mechanical waves need a material medium to shake. • Mechanical waves can be transverse or longitudinal. • The speed of a mechanical wave is determined by how stiff and how dense is the medium.

19. Summary Continued • Radio, light, heat radiation, microwaves and X-rays are all electromagnetic waves that do not require any medium other than space. • Seismic waves are of two types: • Longitudinal P waves • Transverse S-waves

20. Chapter Activities Are designed to provide a variety of experiences with waves. Students will generate and study waves traveling through many different types of medium including: Air Dominoes String Rubber And Jello

21. Now let’s take a look at Chapter Four.