Reflecting light and sending signals
Answers are for parents and teachers.
1
Test three things at home with a grown-up and a torch: kitchen foil, a white paper plate and a dark cloth. Which gives the brightest patch?
The foil usually gives the brightest patch.
2
Write one transparent and one opaque thing you can find at home.
Examples: glass cup (transparent); wooden table (opaque).
3
Write a claim, evidence and reasoning for: “Why are safety vests shiny?”
Claim: shiny strips help drivers see people. Evidence: they glow in headlights. Reasoning: they reflect the light back toward the driver.
4
Invent a movement signal with a family member. What does it mean? Does it work?
Answers differ. Both must know the meaning.
5
Draw a sender, a signal and a receiver using a lighthouse and a ship.
The lighthouse is the sender, the flashing light the signal, the ship the receiver.