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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 44 · 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 > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  2. 2.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  3. 3.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 240 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  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 OFF (b) porch lamp ON
  5. 5.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump OFF (b) pump ON
  6. 6.🤖 “if (A AND B)” is true when … (a) only B is true (b) only A is true (c) both are false (d) both A and B are true
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) neither part (c) both parts (d) the if part
  8. 8.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 482. What happens?     (a) lamp ON (b) lamp OFF
  10. 10.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  11. 11.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  12. 12.🤖 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 ON (b) porch lamp OFF
  13. 13.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 64. What happens?     (a) red LED ON (b) green LED ON
  14. 14.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  15. 15.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  16. 16.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  17. 17.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 55. What happens?     (a) green LED ON (b) red LED ON
  18. 18.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  19. 19.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  20. 20.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 50. What happens?     (a) red LED ON (b) green LED ON
  21. 21.🤖 if (light < 400 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
  22. 22.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  23. 23.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  24. 24.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 30 %. What happens?     (a) pump ON (b) pump OFF
  25. 25.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 210 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  28. 28.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  29. 29.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  30. 30.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 263. What happens?     (a) lamp OFF (b) lamp ON
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  33. 33.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 40. What happens?     (a) red LED ON (b) green LED ON
  36. 36.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  37. 37.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  38. 38.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 78. What happens?     (a) red LED ON (b) green LED ON
  40. 40.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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