Electronics in a Product: Switch, Sensor, Output · seed 1 · A4, ink-friendly. The answer key prints on its own page for grown-ups.

Sense, Decide, Do

Design & Technology · Designing & Making · ages 11-13
Name ______________________   Date ____________

  1. What triggers a sensor?

    • A person pressing it
    • The world around it, like darkness
    • Nothing ever

  2. What are the three jobs inside most gadgets?

    • Sense, decide and happen
    • Paint, polish and pack
    • Freeze, fry and bake

  3. A torch button is a switch because a person presses it.

    Circle one:   True   False

  4. In a simple radio, which part is the output?

    • The antenna that catches waves
    • The earpiece that makes sound
    • The battery that gives power

  5. A garden lamp glows at night with no one near. What started it?

    • A hidden person
    • A remote button held down
    • Its own darkness sensor

  6. In a simple radio, which part receives the signal?

    • The earpiece
    • The antenna
    • The speaker wire

  7. A night light glows all day. Its sensor works and its lamp works. What is broken?

    • The deciding link between them
    • The colour of its case
    • The shape of its plug

  8. A lamp should glow only when dark AND someone moves. Which parts does it need?

    • A lamp alone
    • A lamp plus a switch only
    • A lamp plus a light sensor and a motion sensor
LightMySky · lightmysky.comW1-mt_KNLW4qke5J-s1

Answer key

For grown-ups. Fold this page away before handing over the rest.

Sense, Decide, Do W1-mt_KNLW4qke5J-s1

  1. The world around it, like darkness · A sensor watches the world and fires by itself.
  2. Sense, decide and happen · Every product senses, chooses, then acts.
  3. True · A switch waits for a person to decide.
  4. The earpiece that makes sound · The earpiece does the thing you can notice: sound.
  5. Its own darkness sensor · The lamp noticed the dark all by itself.
  6. The antenna · The antenna catches the waves from the air.
  7. The deciding link between them · Good senses plus good outputs still fail when the middle choice never fires.
  8. A lamp plus a light sensor and a motion sensor · Two senses feed one choice, so the lamp fires only when both agree.
Worksheet · LightMySky