This video satisfies the 1-PS4-2 and 1-PS4-3 requirement(s) for first grade proficiency.
Students who demonstrate understanding can:
1-PS4-2. Make observations to construct an evidence-based account that objects in darkness can be seen only when illuminated.
1-PS4-3. Plan and conduct investigations to determine the effect of placing objects made with different materials in the path of a beam of light.