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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 759 · 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) both parts (d) the else part
  2. 2.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 441. What happens?     (a) lamp OFF (b) lamp ON
  3. 3.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 80. What happens?     (a) green LED ON (b) red LED ON
  6. 6.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  8. 8.🤖 if (light < 400 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 ON (b) porch lamp OFF
  9. 9.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) only A is true (d) both A and B are true
  10. 10.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  11. 11.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  12. 12.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 200. What happens?     (a) lamp OFF (b) lamp ON
  13. 13.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 454. What happens?     (a) lamp ON (b) lamp OFF
  15. 15.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 115. What happens?     (a) lamp ON (b) lamp OFF
  16. 16.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  17. 17.🤖 if (light < 400 OR 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
  18. 18.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 648. What happens?     (a) lamp ON (b) lamp OFF
  19. 19.🤖 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
  20. 20.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  21. 21.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  22. 22.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 66 %. What happens?     (a) pump ON (b) pump OFF
  24. 24.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  28. 28.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 426. What happens?     (a) lamp ON (b) lamp OFF
  29. 29.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  30. 30.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  31. 31.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  32. 32.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 27 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  33. 33.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 25 %. What happens?     (a) pump ON (b) pump OFF
  34. 34.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 582. What happens?     (a) lamp ON (b) lamp OFF
  35. 35.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 10 %. What happens?     (a) pump OFF (b) pump ON
  36. 36.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  37. 37.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  38. 38.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 46 %. What happens?     (a) pump ON (b) pump OFF
  40. 40.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps

Answer key

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

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