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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 825 · 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 > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  2. 2.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan ON (b) fan OFF
  3. 3.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 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
  5. 5.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 486. What happens?     (a) lamp OFF (b) lamp ON
  7. 7.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  8. 8.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 231. What happens?     (a) lamp ON (b) lamp OFF
  9. 9.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  10. 10.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  11. 11.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 90. What happens?     (a) green LED ON (b) red LED ON
  12. 12.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  13. 13.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan OFF (b) fan ON
  14. 14.🤖 if (light < 300 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
  15. 15.🤖 “if (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) only A is true (d) both are false
  16. 16.🤖 if (temperature > 34) { 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
  17. 17.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 19 %. What happens?     (a) pump ON (b) pump OFF
  19. 19.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 57 %. What happens?     (a) pump ON (b) pump OFF
  21. 21.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  22. 22.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 356. What happens?     (a) lamp OFF (b) lamp ON
  24. 24.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 59 %. What happens?     (a) pump ON (b) pump OFF
  25. 25.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 494. What happens?     (a) lamp ON (b) lamp OFF
  26. 26.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  27. 27.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  28. 28.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 67 %. What happens?     (a) pump OFF (b) pump ON
  29. 29.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  30. 30.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  32. 32.🤖 if (light < 400 OR 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 (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  34. 34.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 25 %. What happens?     (a) pump OFF (b) pump ON
  35. 35.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  36. 36.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  37. 37.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 2 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  40. 40.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan ON (b) fan OFF

Answer key

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

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