Waves
6th Grade Science · 11 lessons
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Lessons
- 1Scientific ModelsModels help scientists represent complex systems. Physical models (like a globe), mathematical models (like equations), and computer models all simplify reality to make it easier to study.Lesson
- 2Reflection, Refraction, and AbsorptionLight travels in straight lines and can be reflected, refracted, or absorbed. Mirrors reflect light, lenses refract (bend) light, and dark surfaces absorb light.Lesson
- 3Splitting Light with a PrismLight behaves as both a wave and a particle. White light can be separated into a spectrum of colors using a prism. Each color has a different wavelength.Lesson
- 4Using Models to PredictA model simplifies something too big, too small or too slow to study directly. Its value is that it makes a prediction you can check. Every model is wrong in some way; a useful one is wrong in ways that do not matter for the question asked.Experiment
- 5Where Our Materials Come FromEvery manufactured object begins as a mined, farmed or drilled raw material. Tracing a phone or a jumper back to its sources shows the real cost of a product, and it is the first step in deciding what to reuse rather than replace.Lesson
- 6Reduce, Reuse, Recycle — in That OrderThe three are ranked, not equal. Reducing avoids the material entirely, reusing avoids reprocessing, and recycling still costs energy and loses quality each cycle. Treating recycling as the first answer misses the two larger savings.Experiment
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