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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 247 · 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 > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 92. What happens?     (a) red LED ON (b) green LED ON
  2. 2.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  3. 3.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 403. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  6. 6.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  7. 7.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  8. 8.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  10. 10.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 190. What happens?     (a) lamp ON (b) lamp OFF
  11. 11.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only B is true (c) only A is true (d) both are false
  12. 12.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) both parts (d) the if part
  13. 13.🤖 if (light < 400 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 ON (b) porch lamp OFF
  14. 14.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  15. 15.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 57. What happens?     (a) red LED ON (b) green LED ON
  17. 17.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 33 %. What happens?     (a) pump OFF (b) pump ON
  18. 18.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  20. 20.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  21. 21.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  22. 22.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  24. 24.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 10 %. What happens?     (a) pump ON (b) pump OFF
  25. 25.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (light < 400 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 ON (b) porch lamp OFF
  28. 28.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  30. 30.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  33. 33.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 30 %. What happens?     (a) pump ON (b) pump OFF
  34. 34.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  35. 35.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  36. 36.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  38. 38.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 81. What happens?     (a) lamp OFF (b) lamp ON
  39. 39.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  40. 40.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 30 %. What happens?     (a) pump OFF (b) pump ON

Answer key

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

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