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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 527 · 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 < 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 ON (b) porch lamp OFF
  2. 2.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) only A is true (d) both A and B are true
  3. 3.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  4. 4.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  5. 5.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 128. What happens?     (a) lamp OFF (b) lamp ON
  6. 6.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  7. 7.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 25 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  8. 8.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 381. What happens?     (a) lamp OFF (b) lamp ON
  11. 11.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 436. What happens?     (a) lamp ON (b) lamp OFF
  12. 12.🤖 if (temperature > 31) { 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
  13. 13.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  15. 15.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens?     (a) pump ON (b) pump OFF
  16. 16.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 86. What happens?     (a) green LED ON (b) red LED ON
  17. 17.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  18. 18.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 33 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  19. 19.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) neither part (c) the else part (d) the if part
  20. 20.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 27 %. What happens?     (a) pump ON (b) pump OFF
  21. 21.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  22. 22.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 10 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  23. 23.🤖 if (light < 300 AND 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
  24. 24.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  25. 25.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 20 °C. What happens?     (a) fan OFF (b) fan ON
  26. 26.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  27. 27.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  28. 28.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  29. 29.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 32 %. What happens?     (a) pump ON (b) pump OFF
  32. 32.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  33. 33.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 61 %. What happens?     (a) pump OFF (b) pump ON
  34. 34.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 54 %. What happens?     (a) pump OFF (b) pump ON
  35. 35.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  36. 36.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  37. 37.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  38. 38.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 16 %. What happens?     (a) pump ON (b) pump OFF
  39. 39.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (light < 200 AND 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

Answer key

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

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