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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 331 · 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 OFF (b) fan ON
  2. 2.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  3. 3.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  4. 4.🤖 “if (A AND B)” is true when … (a) only A is true (b) both A and B are true (c) both are false (d) only B is true
  5. 5.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 if (light < 300 OR 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
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) neither part (c) both parts (d) the else part
  8. 8.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  9. 9.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  10. 10.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  11. 11.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 68. What happens?     (a) lamp OFF (b) lamp ON
  13. 13.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  14. 14.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 27 %. What happens?     (a) pump OFF (b) pump ON
  15. 15.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 61 %. What happens?     (a) pump OFF (b) pump ON
  16. 16.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 41 %. What happens?     (a) pump ON (b) pump OFF
  17. 17.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 57. What happens?     (a) red LED ON (b) green LED ON
  18. 18.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  19. 19.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 81. What happens?     (a) green LED ON (b) red LED ON
  20. 20.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  21. 21.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  23. 23.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 415. What happens?     (a) lamp OFF (b) lamp ON
  24. 24.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 93. What happens?     (a) green LED ON (b) red LED ON
  27. 27.🤖 if (light < 200 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
  28. 28.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  29. 29.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  31. 31.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 410. What happens?     (a) lamp ON (b) lamp OFF
  33. 33.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump ON (b) pump OFF
  34. 34.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 43 %. What happens?     (a) pump ON (b) pump OFF
  35. 35.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  36. 36.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  38. 38.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 17 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  39. 39.🤖 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
  40. 40.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens?     (a) pump OFF (b) pump ON

Answer key

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

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