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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 358 · 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 (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 47. What happens?     (a) green LED ON (b) red LED ON
  2. 2.🤖 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
  3. 3.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 51. What happens?     (a) red LED ON (b) green LED ON
  4. 4.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 490 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only A is true (c) both are false (d) only B is true
  6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 370. What happens?     (a) lamp OFF (b) lamp ON
  7. 7.🤖 if (temperature > 38) { 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
  8. 8.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens?     (a) fan OFF (b) fan ON
  9. 9.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  10. 10.🤖 if (light < 300 AND 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
  11. 11.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  12. 12.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  13. 13.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  15. 15.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  16. 16.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  17. 17.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) both parts (c) neither part (d) the if part
  18. 18.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  19. 19.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON
  20. 20.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 70 %. What happens?     (a) pump OFF (b) pump ON
  22. 22.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  23. 23.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens?     (a) pump OFF (b) pump ON
  24. 24.🤖 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 ON (b) porch lamp OFF
  25. 25.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 63. What happens?     (a) red LED ON (b) green LED ON
  26. 26.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  28. 28.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  29. 29.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  30. 30.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan OFF (b) fan ON
  33. 33.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  34. 34.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  35. 35.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  36. 36.🤖 if (temperature > 30) { 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
  37. 37.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) red LED ON (b) green LED ON
  38. 38.🤖 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
  39. 39.🤖 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
  40. 40.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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