1. Waves S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. b. Describe how the behavior of light waves is manipulated causing reflection, refraction, diffraction, and absorption. c. Explain how the human eye sees objects and colors in terms of wavelengths. d. Describe how the behavior of waves is affected by medium (such as air, water, solids). e. Relate the properties of sound to everyday experiences. f. Diagram the parts of the wave and explain how the parts are affected by changes in amplitude and pitch.

2. What are Waves? S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified? A wave is a disturbance that transfers energy from from place to place. Energy is defined as the ability to do work.

3. Waves and Energy Waves travel through water, but they do not carry the water (or the duck) with them. S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

4. What Carries Waves? The material through which a wave travels is called a medium. For example, a medium can be a gas (such as air, liquids, (such as water), and solids (such as ropes) can all be mediums. Waves that require a medium through which to travel are called mechanical waves. S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

5. What Causes Mechanical Waves? Mechanical waves are produced when a source of energy causes a medium to vibrate. A vibration is a repeated back and forth or up and down motion. S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

6. How are Mechanical Waves Classified? Mechanical waves are classified by how they move. S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

7. What are two types of Mechanical Waves? 1. Transverse Wave S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

8. Waves that move a medium in a direction perpendicular, or at right angles, to the direction in which the waves are traveling. The highest parts of transverse waves are called crests, and the lowest parts are called troughs. Transverse Waves S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

9. What are two types of Mechanical Waves? 2. Longitudinal Wave S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

10. Waves that move particles of medium parallel to the direction in which the waves are traveling. The parts where the coils are close together are called compressions. The parts where the coils are spread out called rarefactions. Longitudinal Waves S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

11. Comparison of Mechanical Waves and Longitudinal Waves The compressions of a longitudinal wave correspond to the crest of a transverse wave. The troughs correspond to rarefactions. S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?

12. What You Learned 1.Mechanical waves can be transverse waves or longitudinal waves. 2.Transverse waves move the medium up or down or side to side, and they have crests and troughs. 3.Longitudinal waves move the medium back and forth, and they have compressions and rarefactions. S8P4 - Students will explore the wave nature of sound and electromagnetic radiation. a. Identify the characteristics of electromagnetic and mechanical waves. Essential Question: 1.What causes mechanical waves? 2.What are two types of waves and how are they classified?