G9 T3 Waves 2024 PDF
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This document is a unit of inquiry on waves, specifically designed for Grade 9. It covers key concepts like systems, movement, and scientific innovation. The document includes various questions regarding wave properties and types, as well as activities and references for further research.
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Grade 9 /A Unit of Inquiry: Waves 1 Key concept: Systems 2 Related concept: Movement 3 Global context: Scientific and technological innovation 4 Statement of inquiry: The m...
Grade 9 /A Unit of Inquiry: Waves 1 Key concept: Systems 2 Related concept: Movement 3 Global context: Scientific and technological innovation 4 Statement of inquiry: The movement of energy waves transform dynamic systems and created technological innovations. 5 Consider these questions Factual questions: What are waves? What is sound? What is an electromagnetic wave? What are wave properties? Conceptual questions : How waves can be reflected and refracted? How waves can interfere? How waves construct our daily lives even when we do not see them? Debatable question: Are the electromagnetic waves from the cell phone antennas harmful to human beings? 6 Key words: Wave Wavelength Frequency Sound Electromagnetic wave reflection Refraction Diffraction Interference 7 Factual question: What are waves? 8 What do you see? 9 10 What do you think? 11 12 13 Activity 2: ork : Class w ATL Read critically and for comprehension take notes After watching this diagram, fill the blanks and complete the sentences using these following words: crests, time, waves 1.Wavelength can be defined as the distance between two successive ……. or troughs of a wave. 2.Frequency (f): Number of …… passing by a specific point per second. The SI unit is Hertz (Hz) 3.Period (T): ….. it takes for one wave cycle to complete 4.Amplitude (x): the maximum displacement or distance moved by a point on a wave measured from its equilibrium position. 14 Activity 3: Word Scramble: Unscramble the word to complete sentences 1. Wave speed is the distance a wave travels in a given amount of time. 2. Wave speed is related to wavelength and wave QUENFRECY………….….. by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when WENGTHAVEL ……………….. and frequency are known. 15 https://www.youtube.com/watch?v=0Anh9HthWgQ 16 17 References 1. The Physics Classsroom, (nd) Ray Optics: Refraction and Lenses, Star formation, retrieved November 21st, 2020 from https://www.physicsclassroom.com/calcpad/refr n/problems 2. Heathcote William, MYP Physics, A concept based approach, (2014), Oxford University Press, pages 195 – 198. 18
