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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 150 · 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 < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  2. 2.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) only B is true (d) both A and B are true
  3. 3.🤖 if (light < 300 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
  4. 4.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 19 °C. What happens?     (a) fan ON (b) fan OFF
  5. 5.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens?     (a) pump ON (b) pump OFF
  6. 6.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  7. 7.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 86. What happens?     (a) red LED ON (b) green LED ON
  8. 8.🤖 if (light < 200 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
  9. 9.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) neither part (c) the if part (d) the else part
  10. 10.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  11. 11.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  13. 13.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  15. 15.🤖 if (light < 400 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
  16. 16.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  17. 17.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  18. 18.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  20. 20.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  21. 21.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 52. What happens?     (a) green LED ON (b) red LED ON
  22. 22.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 337. What happens?     (a) lamp OFF (b) lamp ON
  23. 23.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 3 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  24. 24.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 40 °C. What happens?     (a) fan OFF (b) fan ON
  25. 25.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  26. 26.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 355. What happens?     (a) lamp ON (b) lamp OFF
  27. 27.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  28. 28.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 396. What happens?     (a) lamp OFF (b) lamp ON
  29. 29.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  30. 30.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  31. 31.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (light < 400 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
  33. 33.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 28 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  34. 34.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 266. What happens?     (a) lamp OFF (b) lamp ON
  35. 35.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  36. 36.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  37. 37.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 45 %. What happens?     (a) pump OFF (b) pump ON
  39. 39.🤖 if (temperature > 31) { 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
  40. 40.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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