← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 329 · 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 (light < 300 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 ON (b) porch lamp OFF
  2. 2.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 19 °C. What happens?     (a) fan ON (b) fan OFF
  3. 3.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 548. What happens?     (a) lamp OFF (b) lamp ON
  4. 4.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  5. 5.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 75. What happens?     (a) red LED ON (b) green LED ON
  7. 7.🤖 “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
  8. 8.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 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
  10. 10.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan OFF (b) fan ON
  11. 11.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 57 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  15. 15.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  16. 16.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 45. What happens?     (a) green LED ON (b) red LED ON
  17. 17.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  19. 19.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 42 %. What happens?     (a) pump OFF (b) pump ON
  21. 21.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 60. What happens?     (a) red LED ON (b) green LED ON
  22. 22.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  23. 23.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  24. 24.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 550 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 18 °C. What happens?     (a) fan ON (b) fan OFF
  27. 27.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) green LED ON (b) red LED ON
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  29. 29.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 84. What happens?     (a) green LED ON (b) red LED ON
  34. 34.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  35. 35.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 45 %. What happens?     (a) pump OFF (b) pump ON
  36. 36.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  38. 38.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 333. What happens?     (a) lamp ON (b) lamp OFF
  39. 39.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  40. 40.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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