What to know Light travels outward from a source in straight paths. An object or a new medium can change what happens to the light. Aligned holes allow light through; moving one hole blocks the path. 🔎 Think like a scientist A flashlight beam passes through three aligned card holes but is blocked when the middle card shifts.
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What to know Reflection sends light back from a surface. Refraction bends light as it enters a different medium. Absorption takes in light energy, often warming the material. 🔎 Think like a scientist A mirror reflects, a straw appears bent in water because of refraction, and dark cloth absorbs much of the light.
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LESSON 5.3 · SC.3.P.10.3 · SC.3.P.10.4
Light and Shadows Learning goal: Use light paths and material behavior to explain shadows.
What to know Opaque materials block most light and create clear shadows. Transparent materials transmit most light; translucent materials transmit some. A shadow forms where direct light is blocked. 🔎 Think like a scientist Moving an object closer to a flashlight can create a larger shadow because it blocks a wider part of the spreading beam.
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Unit 5 benchmark map Crystal Lake’s unit outline is mapped to Florida’s official Grade 3 science course. Lessons group connected ideas so benchmarks are learned in context.
SC.3.P.10.3 Light Travels StraightSC.3.P.10.4 Reflect, Refract, AbsorbSC.3.P.10.3 · SC.3.P.10.4 Light and Shadows
Sources and curriculum references Crystal Lake Elementary — Grade 3 Science outline Local Unit 1 scope: science, scientists, and the framework of investigation.
CPALMS — Science, Grade Three course 5020040 Florida’s official current Grade 3 science course and benchmark set.
Florida DOE — Grade 3 course standards Official consolidated course-standard language, including SC.3.N.1 and SC.3.N.3.