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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 671 · 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 620 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  2. 2.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) the if part (c) the else part (d) neither part
  4. 4.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  6. 6.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  7. 7.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  8. 8.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  9. 9.🤖 if (light < 300 AND 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
  10. 10.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  11. 11.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 20 °C. What happens?     (a) fan OFF (b) fan ON
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  15. 15.🤖 “if (A AND B)” is true when … (a) both are false (b) only A is true (c) only B is true (d) both A and B are true
  16. 16.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 36 %. What happens?     (a) pump OFF (b) pump ON
  20. 20.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 30 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  21. 21.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  22. 22.🤖 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
  23. 23.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 62. What happens?     (a) green LED ON (b) red LED ON
  24. 24.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 446. What happens?     (a) lamp OFF (b) lamp ON
  25. 25.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 99. What happens?     (a) red LED ON (b) green LED ON
  26. 26.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  27. 27.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) red LED ON (b) green LED ON
  28. 28.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  30. 30.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  31. 31.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  34. 34.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 58 %. What happens?     (a) pump ON (b) pump OFF
  35. 35.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 32 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  36. 36.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 72. What happens?     (a) red LED ON (b) green LED ON
  37. 37.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  38. 38.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 89. What happens?     (a) green LED ON (b) red LED ON
  40. 40.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 270 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON

Answer key

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

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