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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 600 · 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 > 23) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  2. 2.🤖 if (light < 200 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 ON (b) porch lamp OFF
  3. 3.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  4. 4.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  5. 5.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  6. 6.🤖 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
  7. 7.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  8. 8.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  9. 9.🤖 “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
  10. 10.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 46. What happens?     (a) red LED ON (b) green LED ON
  11. 11.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  12. 12.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  13. 13.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 520. What happens?     (a) lamp OFF (b) lamp ON
  14. 14.🤖 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
  15. 15.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  16. 16.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  18. 18.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  19. 19.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 33 %. What happens?     (a) pump ON (b) pump OFF
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 20 °C. What happens?     (a) fan ON (b) fan OFF
  23. 23.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  25. 25.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON
  26. 26.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 460 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan OFF (b) fan ON
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 77. What happens?     (a) green LED ON (b) red LED ON
  30. 30.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  32. 32.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens?     (a) pump OFF (b) pump ON
  33. 33.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  35. 35.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  36. 36.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  37. 37.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 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 OFF (b) porch lamp ON
  39. 39.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  40. 40.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan ON (b) fan OFF

Answer key

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

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