← Integrated Science / 3 Force and Energy
3.2 Waves
Integrated Science · Grade 9 · 16 lessons in the design
What this covers
- Generation of waves.
- Classification of waves as longitudinal and transverse.
- Characteristics of waves.
- Remote sensing.
- Applications of waves in day-to-day life: medical, communication and cooking.
What you will be able to do
- describe the generation of waves in nature
- classify waves as longitudinal and transverse
- describe basic characteristics of waves in nature
- describe remote sensing in relation to waves
- describe applications of waves in day-to-day life
- appreciate the applications of waves in day-to-day life
Key questions
“How are waves applied in our day-to-day life?”
Lessons
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What a wave is
40 min · 1 practice tasks · quizA disturbance that carries energy without carrying matter.
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Transverse waves
40 min · 1 practice tasks · quizParticles vibrate across the direction of travel, giving crests and troughs.
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Longitudinal waves
40 min · 1 practice tasks · quizParticles vibrate along the direction of travel, giving compressions and rarefactions.
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Comparing the two kinds
40 min · 1 practice tasks · quizOne difference decides all the rest.
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Amplitude and wavelength
40 min · 1 practice tasks · quizHow far a particle swings, and how long one whole wave is.
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Frequency and period
40 min · 1 practice tasks · quizWaves per second, and seconds per wave.
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The wave equation
40 min · 1 practice tasks · quizSpeed equals frequency times wavelength.
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Using the wave equation
40 min · 1 practice tasks · quizEquation, substitute, answer, unit. In that order, every time.
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Phase
40 min · 1 practice tasks · quizTwo points are in phase when they are doing the same thing at the same time.
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Straight lines and reflection
40 min · 1 practice tasks · quizWaves keep going straight until something stops them, and then they bounce.
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Bending and spreading
40 min · 1 practice tasks · quizChange a wave's speed and it bends; give it a gap and it spreads.
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Remote sensing
40 min · 1 practice tasks · quizFinding out about something without touching it.
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How remote sensing works
40 min · 1 practice tasks · quizThree things radiation can do, and two ways of supplying it.
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Waves in medicine
40 min · 1 practice tasks · quizSeeing inside, scanning in detail, and treating disease.
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Communication, detection and cooking
40 min · 1 practice tasks · quizThe same physics carries a phone call, finds an aircraft and heats a meal.
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Waves: the whole sub-strand
40 min · 2 practice tasks · quizGeneration, kinds, parts and uses, and one sentence that holds it together.