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reflection
A mirror reflects incoming light.
Class 5 · Bangla Version · General science
Light, sound and electricity
Explore light, sound and electricity with an example and your own answers.
Original Kidemy foundation practice · Read the example, write your answers, then check. This starter is shared across class versions; it is not a complete board-specific lesson or course.
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Learn the idea
Light can reflect from surfaces. Sound comes from vibrations. A complete low-voltage circuit can power a suitable component, with supervision.
Worked example
A mirror reflects light. A drum skin vibrates to produce sound. A gap stops a simple battery-and-bulb circuit.
- Read the example and explain which rule or evidence it uses.
- Try each task yourself, then compare the answer and its reason.
Your written practice
Show your working on paper and enter your answer here. If it does not match, compare the model and try again.
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vibration
The skin moves rapidly backwards and forwards.
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a complete path
An open circuit has a break in the conducting path.
Take it further
Apply the idea in a new situation and explain your method. Open writing needs a guardian or teacher to review it.
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reflection
Reflection changes the direction of light at a surface.
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frequency
Higher vibration frequency corresponds to higher pitch in ordinary examples.
Write in your own words. A guardian or teacher should review this response.
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Pitch relates to vibration frequency; loudness relates to sound intensity and how it is heard. A high note need not be loud.
Use a conceptual example rather than exposing anyone to loud sound.
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