← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 465 · 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 (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  2. 2.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  3. 3.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 65. What happens?     (a) lamp ON (b) lamp OFF
  4. 4.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  6. 6.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) the if part (d) both parts
  7. 7.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) both are false (c) only A is true (d) only B is true
  8. 8.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 32 %. What happens?     (a) pump OFF (b) pump ON
  9. 9.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  10. 10.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  11. 11.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  13. 13.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  14. 14.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  15. 15.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 9 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  16. 16.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  17. 17.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 28 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  18. 18.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 1 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  19. 19.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  22. 22.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  23. 23.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  24. 24.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 441. What happens?     (a) lamp OFF (b) lamp ON
  27. 27.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 53. What happens?     (a) red LED ON (b) green LED ON
  28. 28.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 33 %. What happens?     (a) pump ON (b) pump OFF
  29. 29.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  31. 31.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  32. 32.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  36. 36.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 382. What happens?     (a) lamp OFF (b) lamp ON
  37. 37.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan ON (b) fan OFF
  38. 38.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 40 %. What happens?     (a) pump ON (b) pump OFF
  39. 39.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  40. 40.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON

Answer key

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

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