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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 663 · 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 > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  2. 2.🤖 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) Cool (c) Hot
  3. 3.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 36 %. What happens?     (a) pump OFF (b) pump ON
  4. 4.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only A is true (c) only B is true (d) both are false
  5. 5.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  6. 6.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 93. What happens?     (a) red LED ON (b) green LED ON
  7. 7.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  8. 8.🤖 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
  9. 9.🤖 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
  10. 10.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  11. 11.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 319. What happens?     (a) lamp OFF (b) lamp ON
  12. 12.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  13. 13.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  14. 14.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  15. 15.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 437. What happens?     (a) lamp ON (b) lamp OFF
  17. 17.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 489. What happens?     (a) lamp OFF (b) lamp ON
  18. 18.🤖 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 OFF (b) porch lamp ON
  19. 19.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  20. 20.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  23. 23.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan OFF (b) fan ON
  25. 25.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  26. 26.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  27. 27.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump OFF (b) pump ON
  28. 28.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  29. 29.🤖 if (light < 400 OR 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
  30. 30.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  33. 33.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  34. 34.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  35. 35.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 71. What happens?     (a) red LED ON (b) green LED ON
  36. 36.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 88. What happens?     (a) red LED ON (b) green LED ON
  37. 37.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  38. 38.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  39. 39.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  40. 40.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 44 %. What happens?     (a) pump ON (b) pump OFF

Answer key

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

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