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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 97 · 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.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) the else part (d) both parts
  2. 2.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  3. 3.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 221. What happens?     (a) lamp OFF (b) lamp ON
  5. 5.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  6. 6.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  8. 8.🤖 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
  9. 9.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 “if (A AND B)” is true when … (a) only B is true (b) only A is true (c) both A and B are true (d) both are false
  11. 11.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 42 %. What happens?     (a) pump OFF (b) pump ON
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  13. 13.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  15. 15.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  16. 16.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 544. What happens?     (a) lamp ON (b) lamp OFF
  17. 17.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 67. What happens?     (a) red LED ON (b) green LED ON
  18. 18.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 649. What happens?     (a) lamp OFF (b) lamp ON
  19. 19.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 294. What happens?     (a) lamp OFF (b) lamp ON
  21. 21.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan OFF (b) fan ON
  22. 22.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 79. What happens?     (a) red LED ON (b) green LED ON
  24. 24.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 50. What happens?     (a) red LED ON (b) green LED ON
  25. 25.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  27. 27.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens?     (a) green LED ON (b) red LED ON
  28. 28.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  29. 29.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  30. 30.🤖 if (light < 300 AND 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
  31. 31.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  32. 32.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 78. What happens?     (a) green LED ON (b) red LED ON
  33. 33.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  34. 34.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 440 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 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
  36. 36.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (light < 200 OR 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
  38. 38.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 1 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  40. 40.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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