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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 291 · 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 (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 22 %. What happens?     (a) pump OFF (b) pump ON
  2. 2.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 25 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  3. 3.🤖 “if (A AND B)” is true when … (a) only A is true (b) both A and B are true (c) both are false (d) only B is true
  4. 4.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 36 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  6. 6.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) the else part (c) both parts (d) neither part
  7. 7.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  8. 8.🤖 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
  9. 9.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  10. 10.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  11. 11.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  13. 13.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 440 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  16. 16.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  17. 17.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 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 ON (b) porch lamp OFF
  20. 20.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan OFF (b) fan ON
  21. 21.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan ON (b) fan OFF
  22. 22.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 371. What happens?     (a) lamp ON (b) lamp OFF
  23. 23.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  24. 24.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  25. 25.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 25 %. What happens?     (a) pump ON (b) pump OFF
  26. 26.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  28. 28.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) red LED ON (b) green LED ON
  30. 30.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  31. 31.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  32. 32.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  33. 33.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  34. 34.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  35. 35.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  36. 36.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan ON (b) fan OFF
  37. 37.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens?     (a) red LED ON (b) green LED ON
  38. 38.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 428. What happens?     (a) lamp OFF (b) lamp ON
  39. 39.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  40. 40.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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