1. Warm-up! In your agenda, write down the Homework that is due Thursday!!!!!!! IB ASSESSMENT A Have out on your desk, “How do Waves Transfer Energy?” (worksheet from last week) If you have done the two bullets before, please be working on your IB Assessment or reading quietly.

3. Prediction What do you think will happen when I dip this pencil into the bowl of water and pull the pencil out quickly? What do you think will happen if I dip this marker into the bowl of water and pull the marker out quickly?

4. Observations Name a qualitative (looked like, sounded like, smelled like) and quantitative (measurement) observation you made from this demonstration. What are some differences and similarities that you observed from both the pencil and marker?

5. Waves A WAVE is a disturbance that transfers energy from one place to another. A MEDIUM is any substance that a wave moves through. Can be all states of matter: solid, liquid,gas Example 1: Water is the medium for an ocean wave Example 2: The ground is the medium for an earthquake wave.

6. Waves Waves that transfer energy through matter, are known as MECHANICAL WAVES. Example of mechanical waves: water, the ground, a rope, air = all made up of matter

7. Waves In a TRANSVERSE WAVE, the direction in which the wave travels is perpendicular to the direction of the disturbance. Example of transverse wave: Snapping a rope Direction of Disturbance Direction of Wave

8. In a LONGITUDINAL WAVE, the wave travels in the same direction as the disturbance. Example of longitudinal wave: the coils in a spring, slinky Direction of Disturbance Direction of Wave

9. Wave Properties CREST – Highest point, or peak,of wave. TROUGH – Lowest point, or valley, of a wave. AMPLITUDE – Distance between the middle of a wave and a crest. WAVELENGTH – The distance from one wave crest to the very next crest. FREQUENCY – The number of waves passing a fixed point in a certain amount of time.

11. http://www.classzone.com/books/earth_science/terc/ content/visualizations/es1002/es1002page01.cfm?_sm_ au_=iVV2S67rRT7sr0R6 http://www.classzone.com/books/earth_science/terc/ content/visualizations/es1002/es1002page01.cfm?_sm_ au_=iVV2S67rRT7sr0R6 http://www.classzone.com/books/ml_science_share/v is_sim/wslm05_pg18_ http://www.classzone.com/books/ml_science_share/v is_sim/wslm05_pg18_ https://www.flickr.com/photos/physicsclassroom/gall eries/72157625109648267/ https://www.flickr.com/photos/physicsclassroom/gall eries/72157625109648267/ http://phet.colorado.edu/sims/wave-on-a- string/wave-on-a- string_en.html?_sm_au_=iVV2S67rRT7sr0R6graph/ws lm05_pg18_graph.html http://phet.colorado.edu/sims/wave-on-a- string/wave-on-a- string_en.html?_sm_au_=iVV2S67rRT7sr0R6graph/ws lm05_pg18_graph.html http://www.youtube.com/watch?v=ARM42-eorzE