Bell Ringer 3-17-14 Write the question and your answer.. Waves transfer ____, have describable ______, and interact in predictable ____ Hint: Ways, Energy,

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Presentation transcript:

Bell Ringer Write the question and your answer.. Waves transfer ____, have describable ______, and interact in predictable ____ Hint: Ways, Energy, Properties

Waves transfer energy, have describable properties, and interact in predictable ways. Hint: Ways, Energy, Properties

MYP: Can you hear (OR SEE) me NOW? AOI: Health and Social Education Learner Profile: Inquirer Essential Question: What are waves? Standard: S8P4.Students will EXPLORE the wave nature of sound and electromagnetic radiation.  A. Identify the characteristics of electromagnetic waves and mechanical waves.  Learning Target: Today I am learning about the properties of waves, this is important because it will help me understand my world better. Homework: Study for upcoming quiz on Friday.

Opening- Think – Pair - Share  Watch the Demo, then work with your elbow partner to come up with 5 example of waves in your daily experience.

Work Session- Flip Foldable 1- Place 3 pieces of paper with long edges aligned and the short edges staggered. 2- Fold Edges over to reveal staggered spacing- staple along the top 1 2

Label the Flaps WAVE Mechanical & Electromagnetic Waves PARTS OF A TRANSVERSE WAVE PARTS OF A LONGITUNINAL WAVE Transverse Waves Longitudinal Waves

Wave Basics  Definition: A disturbance that transfers ENERGY through matter OR empty space  What causes waves: Waves are created when a source of energy causes a medium to vibrate.  A vibration is a repeated back and forth or up and down motion.  Waves are classified by what they move through or on how energy moves through them.

Classification based on what they move Through  Mechanical waves: waves that can ONLY move through a medium (through matter).. Mechanical waves require the particles of the medium to vibrate in order for energy to be transferred. They cannot travel through empty space!!  Electromagnetic waves: are waves that can travel through matter or empty space where matter is not present.

NATURE OF WAVES- Do Not Write  We now know that waves can be mechanical or electromagnetic, but there are also 3 types of waves:  Three types of waves: *TRANSVERSE *LONGITUDINAL SURFACE/WATER

Classification based on how energy moves through them.  Transverse waves- waves in which particles of the matter vibrate by moving in an up and down motion (move perpendicularly to the direction the wave is moving). Transverse waves are made up of CRESTS and TROUGHS ex: electromagnetic waves (light, x-ray)

PARTS of a TRANSVERSE WAVE!- Top

Parts of a Transverse Wave - Bottom  Crest- The highest point of a wave (top)  Trough- The lowest point of the wave (bottom)

Time to Practice  Use your rope to demonstrate a transverse wave: Work with a partner One of you move your end of the ROPE back and forth (left and right, like a snake crawling), perpendicular to its stretched length. The other student must hold his or her end of the ROPE still. A series of transverse waves will be generated and will travel through a medium (ROPE)

LONGITUDINAL WAVES  Particles vibrate parallel to (in the same direction of) wave travel  Ex- Sound

Parts of a longitudinal wave - top

Parts of a longitudinal wave- Bottom  When the particles move close together it is called COMPRESSION and when they move farther apart RAREFRACTION.  Sound waves

Closing- BBC Bitesize