Igniter 10/31: Open textbook to page 454 and preview Chapter 14. Remember what to look for: Introduction Paragraph Read captions Look at Pictures Look.

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Presentation transcript:

Igniter 10/31: Open textbook to page 454 and preview Chapter 14. Remember what to look for: Introduction Paragraph Read captions Look at Pictures Look at Diagrams Read Headings Read Sub-headings Scan Bold words Guide for reading Questions Checkpoint questions/End of Sect review questions

Bella the “Bunny”

Waves Not that kind of wave!

What are waves? A wave is a disturbance that transfers energy from place to place What is the cause of waves? – When a source of energy causes a medium to vibrate – What is a medium? Material through which a wave travels i.e. water Can be solid, liquid or gas

Cause When a source of energy causes a medium to vibrate. – Vibration is a back-and- forth or up-and-down motion – The motion is the source of the wave Moving objects have energy  object can transfer energy to a medium creating a wave

What carries waves? PTa8qi5X8&feature=player_embedde d PTa8qi5X8&feature=player_embedde d Most waves require something to travel through i.e. air or water If waves require a medium to travel through they are called mechanical waves

Wave Types Transverse Waves: Move the medium at right angles in the direction in which the waves are travelling Longitudinal Waves: Moves particles of the medium parallel the direction that the waves are traveling Combination of Waves: Both transverse and longitudinal Surface waves s/waves/wavemotion.html

Transverse waves Wave moves in one direction Particles of the medium move across the direction of the wave Hcse1jJAto&feature=player_embedd ed Hcse1jJAto&feature=player_embedd ed

Transverse Waves Cont. Parts of a wave: Terms: crest, trough, wavelength, and amplitude

Longitudinal Waves Move the particles of a medium parallel to the direction the waves are travelling Terms: Compression and rarefaction

Combination of Waves Combination of transverse and longitudinal waves Occur at the surface between two mediums example: water and air

Combination of Waves Parts: crest and trough