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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 440 · 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) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  2. 2.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  3. 3.🤖 “if (A AND B)” is true when … (a) only A is true (b) only B is true (c) both A and B are true (d) both are false
  4. 4.🤖 if (light < 300 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
  5. 5.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) both parts (c) the else part (d) neither part
  7. 7.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  8. 8.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 99. What happens?     (a) green LED ON (b) red LED ON
  9. 9.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  10. 10.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 460. What happens?     (a) lamp OFF (b) lamp ON
  14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 92. What happens?     (a) green LED ON (b) red LED ON
  16. 16.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  17. 17.🤖 if (temperature > 30) { 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
  18. 18.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 16 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  20. 20.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  21. 21.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 451. What happens?     (a) lamp OFF (b) lamp ON
  22. 22.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 9 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  23. 23.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 503. What happens?     (a) lamp OFF (b) lamp ON
  24. 24.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 475. What happens?     (a) lamp ON (b) lamp OFF
  25. 25.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  26. 26.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  28. 28.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  29. 29.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 389. What happens?     (a) lamp OFF (b) lamp ON
  30. 30.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  31. 31.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 60. What happens?     (a) red LED ON (b) green LED ON
  32. 32.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 449. What happens?     (a) lamp ON (b) lamp OFF
  33. 33.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 13 %. What happens?     (a) pump ON (b) pump OFF
  34. 34.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  35. 35.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  36. 36.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  37. 37.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  40. 40.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 196. What happens?     (a) lamp ON (b) lamp OFF

Answer key

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

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