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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 58 · 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 A is true (b) both A and B are true (c) only B is true (d) both are false
  2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) both parts (c) the if part (d) neither part
  3. 3.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 48 %. What happens?     (a) pump ON (b) pump OFF
  5. 5.🤖 if (light < 400 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 ON (b) porch lamp OFF
  6. 6.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  7. 7.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  8. 8.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  9. 9.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 95. What happens?     (a) green LED ON (b) red LED ON
  10. 10.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 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 OFF (b) porch lamp ON
  12. 12.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 28 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  13. 13.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  14. 14.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 13 %. What happens?     (a) pump OFF (b) pump ON
  15. 15.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  17. 17.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 60. What happens?     (a) lamp OFF (b) lamp ON
  18. 18.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  19. 19.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  20. 20.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  21. 21.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 26 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  22. 22.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  25. 25.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 348. What happens?     (a) lamp OFF (b) lamp ON
  26. 26.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  27. 27.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  28. 28.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (temperature > 38) { 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
  30. 30.🤖 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
  31. 31.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 15 %. What happens?     (a) pump OFF (b) pump ON
  33. 33.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  34. 34.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  35. 35.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens?     (a) green LED ON (b) red LED ON
  36. 36.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  37. 37.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 55. What happens?     (a) red LED ON (b) green LED ON
  38. 38.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 434. What happens?     (a) lamp ON (b) lamp OFF
  39. 39.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 20 °C. What happens?     (a) fan ON (b) fan OFF
  40. 40.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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