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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 464 · 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 (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 34 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  2. 2.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 59 %. What happens?     (a) pump OFF (b) pump ON
  3. 3.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  4. 4.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  5. 5.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) the else part (d) both parts
  6. 6.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) only A is true (d) both A and B are true
  7. 7.🤖 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
  8. 8.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 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 443. What happens?     (a) lamp ON (b) lamp OFF
  10. 10.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  11. 11.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  12. 12.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  16. 16.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 64. What happens?     (a) green LED ON (b) red LED ON
  19. 19.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 432. What happens?     (a) lamp ON (b) lamp OFF
  20. 20.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  21. 21.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  22. 22.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  23. 23.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  24. 24.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  25. 25.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 54 %. What happens?     (a) pump ON (b) pump OFF
  26. 26.🤖 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 OFF (b) porch lamp ON
  27. 27.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  28. 28.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump ON (b) pump OFF
  29. 29.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  30. 30.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  32. 32.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens?     (a) green LED ON (b) red LED ON
  33. 33.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 281. What happens?     (a) lamp ON (b) lamp OFF
  34. 34.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  35. 35.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 189. What happens?     (a) lamp ON (b) lamp OFF
  37. 37.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  38. 38.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  39. 39.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 525. What happens?     (a) lamp OFF (b) lamp ON
  40. 40.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 50 %. What happens?     (a) pump ON (b) pump OFF

Answer key

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

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