Measuring Waves Essential Standard 6.P.1: Understand the properties of waves and the wavelike property of energy in earthquakes, light and sound. Clarifying Objective 6.P.1.1: Compare the properties of waves to the wavelike properties of energy in earthquakes, light and sound. Learning Objective: Identify crests and troughs, and measure amplitudes and wavelengths of transverse waves. Mini-Lesson #5 (independent): Complete the following statements with terms from the word bank. 1. Tsunamis are usually caused by _____________ on the ocean floor. 2. The highest point of a wave is called its ______________. 3. An ocean wave is an example of a _______________ wave. Word Bank Earthquakes Longitudinal Crest Transverse Trough Engage (whole class): Demonstration of how to measure wavelength, amplitude and frequency of waves. Active Learning (independent): Complete Measuring Waves Activity on Haiku. You will need to open the Waves Worksheet to see the graphs, and then put your answers in the blanks of the assessment. Reflection (independent): If you haven’t already, be sure you have downloaded the Waves Vocabulary List and completed: 1. wave 5. trough 2. transverse wave 6. amplitude 3. longitudinal wave 7. wavelength 4. crest Homework: None! Name________________________________________ Core _________ Date _______ Wave Measurement Worksheet The origin of the wave is the line where it would be at rest. The crest is the highest point of the wave. The trough is the lowest point of the wave. The wavelength of a wave can be measured from one crest to the next crest or from one trough to the next trough. The amplitude of a wave can be measured from the origin to the crest or from the origin to the trough. The frequency is how many waves there are in a certain amount of time. (Each of the following sequences of waves occurs in 1 second so the unit is the Hertz.) In each of the following, the gridlines are 1 cm apart so that a ruler is not necessary. Wave 1 a) wavelength _______cm b) amplitude ______ cm c) frequency _______ Hz b) amplitude ______ cm c) frequency _______ Hz b) amplitude ______ cm c) frequency _______ Hz b) amplitude ______ cm c) frequency _______ Hz Wave 2 a) wavelength _______cm Wave 3 a) wavelength _______cm Wave 4 a) wavelength _______cm Wave 5 a) wavelength _______cm b) amplitude ______ cm c) frequency _______ Hz b) amplitude ______ cm c) frequency _______ Hz b) amplitude ______ cm c) frequency _______ Hz b) amplitude ______ cm c) frequency ______ Hz Wave 6 a) wavelength _______cm Wave 7 a) wavelength _______cm Wave 8 a) wavelength _______cm