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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 555 · 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 > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  2. 2.🤖 if (light < 200 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
  3. 3.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  4. 4.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) both parts (d) the if part
  5. 5.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 72. What happens?     (a) red LED ON (b) green LED ON
  6. 6.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 13 %. What happens?     (a) pump OFF (b) pump ON
  7. 7.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  8. 8.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  9. 9.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 58. What happens?     (a) green LED ON (b) red LED ON
  10. 10.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  11. 11.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  13. 13.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  14. 14.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 57 %. What happens?     (a) pump ON (b) pump OFF
  15. 15.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 440 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  17. 17.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 27 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  20. 20.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 16 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  21. 21.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 259. What happens?     (a) lamp OFF (b) lamp ON
  22. 22.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  24. 24.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 36 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  25. 25.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  26. 26.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 223. What happens?     (a) lamp OFF (b) lamp ON
  27. 27.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 22 %. What happens?     (a) pump OFF (b) pump ON
  28. 28.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  29. 29.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 300 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 94. What happens?     (a) red LED ON (b) green LED ON
  31. 31.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  32. 32.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  33. 33.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 43 %. What happens?     (a) pump ON (b) pump OFF
  34. 34.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  35. 35.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  36. 36.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens?     (a) red LED ON (b) green LED ON
  37. 37.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  38. 38.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  39. 39.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 24 %. What happens?     (a) pump OFF (b) pump ON

Answer key

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

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