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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 95 · 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 > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  2. 2.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  3. 3.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  4. 4.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) both parts (c) neither part (d) the if part
  5. 5.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 4 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  6. 6.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  7. 7.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 230. What happens?     (a) lamp OFF (b) lamp ON
  8. 8.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 440 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  9. 9.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 67. What happens?     (a) red LED ON (b) green LED ON
  10. 10.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 64 %. What happens?     (a) pump OFF (b) pump ON
  11. 11.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 270 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  13. 13.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 39 °C. What happens?     (a) fan OFF (b) fan ON
  14. 14.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 52 %. What happens?     (a) pump ON (b) pump OFF
  15. 15.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  16. 16.🤖 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 ON (b) porch lamp OFF
  17. 17.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) both A and B are true (d) only A is true
  18. 18.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  20. 20.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 67. What happens?     (a) red LED ON (b) green LED ON
  22. 22.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  23. 23.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  24. 24.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens?     (a) pump OFF (b) pump ON
  25. 25.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 63 %. What happens?     (a) pump OFF (b) pump ON
  26. 26.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 442. What happens?     (a) lamp ON (b) lamp OFF
  27. 27.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 603. What happens?     (a) lamp ON (b) lamp OFF
  28. 28.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 75. What happens?     (a) red LED ON (b) green LED ON
  29. 29.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  31. 31.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  32. 32.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 79. What happens?     (a) red LED ON (b) green LED ON
  33. 33.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  34. 34.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  35. 35.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 13 %. What happens?     (a) pump ON (b) pump OFF
  36. 36.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  37. 37.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  38. 38.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  40. 40.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool

Answer key

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

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