← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 908 · 40 questions
TalentJR

Remember (Test, then choose): Put the reading into the condition: true → the if part, false → the else part. > means strictly more and < strictly less; an equal reading makes them false. AND: both true. OR: at least one true. In a chain, the first true condition wins.

NameDateTime takenScore ___ / 40
  1. 1.🤖 “if (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) both are false (d) only A is true
  2. 2.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  3. 3.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  4. 4.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) neither part (c) the else part (d) the if part
  5. 5.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  7. 7.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  8. 8.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  9. 9.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  10. 10.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  11. 11.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 60 %. What happens?     (a) pump ON (b) pump OFF
  12. 12.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 226. What happens?     (a) lamp OFF (b) lamp ON
  13. 13.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  17. 17.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 11 %. What happens?     (a) pump ON (b) pump OFF
  19. 19.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  20. 20.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  21. 21.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) red LED ON (b) green LED ON
  23. 23.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 243. What happens?     (a) lamp OFF (b) lamp ON
  24. 24.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  28. 28.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan ON (b) fan OFF
  29. 29.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  30. 30.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  34. 34.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  35. 35.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  36. 36.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 41 %. What happens?     (a) pump OFF (b) pump ON
  37. 37.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  38. 38.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  39. 39.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 53. What happens?     (a) lamp ON (b) lamp OFF
  40. 40.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 21 cm. What happens?     (a) buzzer beeps (b) buzzer is silent

Answer key

  1. both A and B are true
  2. porch lamp ON
  3. Warm
  4. the else part
  5. Hot
  6. porch lamp OFF
  7. Warm
  8. Warm
  9. fan ON
  10. buzzer beeps
  11. pump OFF
  12. lamp OFF
  13. Cool
  14. porch lamp OFF
  15. porch lamp ON
  16. porch lamp OFF
  17. fan OFF
  18. pump ON
  19. Cool
  20. Cool
  21. porch lamp OFF
  22. green LED ON
  23. lamp OFF
  24. porch lamp OFF
  25. porch lamp ON
  26. porch lamp ON
  27. porch lamp ON
  28. fan ON
  29. fan ON
  30. Cool
  31. Warm
  32. porch lamp OFF
  33. fan OFF
  34. Cool
  35. porch lamp OFF
  36. pump ON
  37. Hot
  38. Warm
  39. lamp ON
  40. buzzer is silent

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids