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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 567 · 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 (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 65 %. What happens?     (a) pump ON (b) pump OFF
  2. 2.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 58 %. What happens?     (a) pump ON (b) pump OFF
  3. 3.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 429. What happens?     (a) lamp OFF (b) lamp ON
  4. 4.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 53. What happens?     (a) red LED ON (b) green LED ON
  6. 6.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  7. 7.🤖 if (light < 200 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
  8. 8.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 44 %. What happens?     (a) pump OFF (b) pump ON
  9. 9.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 41. What happens?     (a) red LED ON (b) green LED ON
  10. 10.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) the else part (c) both parts (d) neither part
  11. 11.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 98. What happens?     (a) green LED ON (b) red LED ON
  14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  16. 16.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON
  17. 17.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  18. 18.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  20. 20.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) both A and B are true (d) only B is true
  21. 21.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  22. 22.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  23. 23.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  24. 24.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  26. 26.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 20 °C. What happens?     (a) fan ON (b) fan OFF
  27. 27.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  28. 28.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 490 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan ON (b) fan OFF
  31. 31.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  33. 33.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  34. 34.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  36. 36.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  37. 37.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  38. 38.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  39. 39.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 236. What happens?     (a) lamp ON (b) lamp OFF
  40. 40.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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