Choose a Light-blocking Screen
Use a supplied observation to choose a material for a purpose.
Supplied materials
- Paper and a pencil, or say your answers aloud.
Learn the idea
Some materials let light through. Some let only some light through. Others block light and make a dark shadow behind them. A material can be useful for one job and unsuitable for another.
Here are fictional test notes, with the same lamp in each test: clear sheet—light passes through; thin tissue—some light passes through; thick card—no light passes through. We will read these notes, so no lamp or experiment is needed.
- Copy the three material names and their recorded results.
- Circle the material that lets the most light pass through in these notes.
- Now underline the material suited to making a dark screen.
- Use the observation to explain your choice.
See the method in action
For a window that lets light through, the clear sheet fits the recorded result. The thick card would block the light instead.
Check your reasoning
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See the answer and explanation
the thick card
The thick card has the recorded result “no light passes through.” That evidence fits the goal of blocking light. The clear sheet and tissue let light through.
Take it further
Imagine a fourth sample called screen D with the result “some light passes through.” Would it replace the thick card for the same job? No: this test says it does not block all the light.
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Check the subject sources
These LifeStarter passages, scenarios and exercises are authored for this Academy with AI assistance and review. External resources keep their publishers’ terms. A grade label suggests a starting level; it does not establish alignment with your school’s complete requirements.