G9 T3 Waves 2024 PDF

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