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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 137 · 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 < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  2. 2.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 46 %. What happens?     (a) pump ON (b) pump OFF
  3. 3.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 48. What happens?     (a) red LED ON (b) green LED ON
  4. 4.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 79. What happens?     (a) red LED ON (b) green LED ON
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  7. 7.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  8. 8.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  9. 9.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  10. 10.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  11. 11.🤖 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
  12. 12.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 49 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 if (light < 400 AND 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
  14. 14.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  15. 15.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 16 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  16. 16.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  17. 17.🤖 if (light < 400 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 ON (b) porch lamp OFF
  18. 18.🤖 if (light < 200 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
  19. 19.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 2 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  20. 20.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 392. What happens?     (a) lamp OFF (b) lamp ON
  21. 21.🤖 if (light < 300 AND 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
  22. 22.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  23. 23.🤖 if (light < 200 OR 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
  24. 24.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) both A and B are true (d) only A is true
  25. 25.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  26. 26.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 23 %. What happens?     (a) pump OFF (b) pump ON
  28. 28.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  29. 29.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  30. 30.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  32. 32.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 55 %. What happens?     (a) pump OFF (b) pump ON
  33. 33.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 29 %. What happens?     (a) pump ON (b) pump OFF
  34. 34.🤖 if (light < 400 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
  35. 35.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 43. What happens?     (a) red LED ON (b) green LED ON
  36. 36.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  37. 37.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  38. 38.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  39. 39.🤖 if (light < 200 OR 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
  40. 40.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 18 °C. What happens?     (a) fan ON (b) fan OFF

Answer key

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

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