Waves and Wave Properties

Transcription

1 Waves and Wave Properties

2 Are You Prepared for Class Today? Do you have your Unit 5 Lesson 1 (p ) bookwork with you? (These pages are due Tuesday for the first grade of the 2nd Quarter).

3 One of Our Unit Learning Goals: I can illustrate that the sun's energy arrives as radiation with a wide range of wavelengths, including infrared, visible, and ultraviolet, and that white light is made up of a spectrum of many different colors. Lesson Learning Goal: How does this lesson help me make progress towards my unit learning goal? I can identify different wave types, as well as the parts of a wave.

4 Let s Do Our Reflection Log Lesson Learning Goal: 10/22-10/23 I can identify different wave types, as well as the parts of a wave.

5 Let s Build Our Understanding Let s Complete a Concept Map Together To Improve Our Understanding of Waves and Wave Types.

6 Are Produced by Vibrating Molecules Which passes energy to Waves are Repeating Disturbance that transfers Energy that need a Medium Medium are called Mechanical Waves and can be either Transverse Neighbor Molecules through or Compressional / Longitudinal Matter or Space

7 Transverse Waves A transverse wave has the motion of the medium perpendicular to the movement of the wave pulse. Examples: light waves, S-waves

8 Longitudinal / Compressional Waves A longitudinal wave has the motion of the medium parallel to the movement of the wave pulse. Examples: sound waves, P-waves

9 Real-World Application

10 Mechanical Waves vs. Light Waves Light moves as a transverse wave, but these waves are EM, not mechanical. Mechanical Waves require a medium to travel. Light waves use an electromagnetic field for propulsion. No medium is needed.

11 Mechanical Waves vs. Electromagnetic Waves Electromagnetic waves are waves which can travel through the vacuum of outer space. (Do not require a medium) Mechanical waves require the presence of a material medium in order to transport their energy from one location to another.

12 Let s Apply (Part 1) With your group, carefully stretch the Slinky out over the length of your table. (Be careful not to over stretch my Slinky!) Send a single wave to your partner:! Observe what happens to the wave when it reaches the other end of the table. Observe the transfer of energy that travels in this wave. Record Your Observations On Your Lab Sheet

13 Let s Apply (Part 2) This time, raise the Slinky about one foot above the table. Move one end of the Slinky back and forth repeatedly like below:! Think about which type of wave you are creating. Identify the parts of the waves you just created. Observe what happens as you vary the rate at which your hand moves the Slinky back and forth. Record Your Observations On Your Lab Sheet

14 Let s Apply (Part 3) For the last demonstration, place the Slinky back on the table and stretch it out over the length of the table. This time, move your hand towards and away repeatedly like below:! Think about which type of wave you are creating. Observe this wave and how energy travels through it. Notice the compressions and rarefactions of these waves. Are the coils actually moving from one end of the table to the other? If not, what was moving through the Slinky? Record Your Observations On Your Lab Sheet

15 Content Statement Your Content Statement for today s lesson is the concept map we created today. Keep it in your interactive binder (Unit C) as a study aid.

16 REMEMBER!!! Book Work is Due on Tuesday!! Your STEM Fair Project Data and Conclusions are due to me in just over two weeks (November 6th). PLEASE WORK ON YOUR PROJECT, AND KEEP UP WITH YOUR SCIENCE LOG!!!!!!

17 Time To Reflect Please open your interactive binder to your Unit C reflection log and reflect on your ability to identify different wave types, as well as the parts of a wave.