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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 462 · 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) { lamp ON } else { lamp OFF }
    The light sensor reads 343. What happens?     (a) lamp ON (b) lamp OFF
  2. 2.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  3. 3.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 504. What happens?     (a) lamp ON (b) lamp OFF
  4. 4.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 362. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  6. 6.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) only B is true (d) both A and B are true
  7. 7.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 41 %. What happens?     (a) pump OFF (b) pump ON
  8. 8.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  9. 9.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 650. What happens?     (a) lamp OFF (b) lamp ON
  11. 11.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump OFF (b) pump ON
  14. 14.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) the else part (c) neither part (d) both parts
  15. 15.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 9 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  16. 16.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  17. 17.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  18. 18.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 460 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 79. What happens?     (a) red LED ON (b) green LED ON
  21. 21.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  22. 22.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 178. What happens?     (a) lamp OFF (b) lamp ON
  23. 23.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  24. 24.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 484. What happens?     (a) lamp ON (b) lamp OFF
  26. 26.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 39 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  28. 28.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (light < 400 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
  30. 30.🤖 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
  31. 31.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 63. What happens?     (a) red LED ON (b) green LED ON
  32. 32.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  33. 33.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 25 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  34. 34.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  35. 35.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  36. 36.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  37. 37.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  38. 38.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  39. 39.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  40. 40.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 72. What happens?     (a) green LED ON (b) red LED ON

Answer key

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

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