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Grade 1 · unit review

Review: Light, shadows, and material choices

Use light observations to explain a model and choose a material for a purpose.

Download reviews and answer keys

Bring the unit skills together

Use these 4 new cases to check your reasoning. Choices are temporary and are not saved to an account, sent to staff or recorded as school grades. Download your current review choices before leaving or reloading.

Unit review questions
1. New notes say sheet M passes light, sheet N blocks light, sheet P passes some light. Which is suited to a dark screen?
2. A sample transmits light and lets you see a clear picture through it. Which term fits?
3. In a model with one lamp, an opaque shape blocks paths to part of a screen. Why is that part darker?
4. A cover must transmit light but blur an image. R transmits and blurs; S blocks; T transmits with a clear view. Which meets both goals?

The download contains your current choices and any checked feedback. Keep the separate transfer-task work in your own document; downloading its instructions does not mark it complete.

Use the skills in a new task

Write a paper design note for a pretend glowing sign. It must pass light and blur a picture behind its cover. Test notes: cover A passes light with a clear image; B passes light with a blurred image; C blocks light. Name the properties, choose a cover, and explain what C would do between a single lamp and a screen.

Work on paper or in your own document. Explain the choices you made.

  • Classify A as transparent, B as translucent, C as opaque.
  • Choose B using both requirements.
  • Use the supplied results as evidence.
  • Explain that C blocks paths and can leave a darker screen region in the one-lamp model.
Compare with a model response

A is transparent, B translucent, and C opaque in these tests. I choose B because it transmits light and blurs the image. C would fail the sign’s light requirement. Between the only lamp and a screen, C blocks some light paths, leaving a darker region behind it.

A different response can also meet the criteria. Compare the evidence and reasoning, rather than copying the wording.