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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 446 · 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 > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the else part (d) the if part
  3. 3.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  4. 4.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 51 %. What happens?     (a) pump OFF (b) pump ON
  5. 5.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) both A and B are true (d) only B is true
  6. 6.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  7. 7.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 27 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  8. 8.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  9. 9.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 310. What happens?     (a) lamp ON (b) lamp OFF
  10. 10.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  11. 11.🤖 if (light < 300 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
  12. 12.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 119. What happens?     (a) lamp ON (b) lamp OFF
  13. 13.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 24 %. What happens?     (a) pump ON (b) pump OFF
  15. 15.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 25 %. What happens?     (a) pump ON (b) pump OFF
  19. 19.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 421. What happens?     (a) lamp OFF (b) lamp ON
  20. 20.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). 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 110 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  25. 25.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  26. 26.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  29. 29.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  30. 30.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 340. What happens?     (a) lamp ON (b) lamp OFF
  32. 32.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 63. What happens?     (a) green LED ON (b) red LED ON
  33. 33.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 39 %. What happens?     (a) pump OFF (b) pump ON
  35. 35.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  36. 36.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 78. What happens?     (a) red LED ON (b) green LED ON
  37. 37.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 55 %. What happens?     (a) pump OFF (b) pump ON
  38. 38.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 33 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON
  40. 40.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 278. What happens?     (a) lamp OFF (b) lamp ON

Answer key

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

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