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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 212 · 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 > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  2. 2.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) both are false (c) only A is true (d) only B is true
  3. 3.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  4. 4.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan OFF (b) fan ON
  5. 5.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) both parts (d) the else part
  6. 6.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  7. 7.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  8. 8.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  10. 10.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 4 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  11. 11.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  12. 12.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 26 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  13. 13.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  14. 14.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  15. 15.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  16. 16.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  17. 17.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  18. 18.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  19. 19.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 210. What happens?     (a) lamp ON (b) lamp OFF
  20. 20.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  21. 21.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  22. 22.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 212. What happens?     (a) lamp ON (b) lamp OFF
  23. 23.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  24. 24.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  25. 25.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 68 %. What happens?     (a) pump OFF (b) pump ON
  26. 26.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  27. 27.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  28. 28.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 87. What happens?     (a) lamp OFF (b) lamp ON
  29. 29.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 45. What happens?     (a) red LED ON (b) green LED ON
  30. 30.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan ON (b) fan OFF
  32. 32.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  33. 33.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  34. 34.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 19 °C. What happens?     (a) fan ON (b) fan OFF
  35. 35.🤖 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
  36. 36.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 304. What happens?     (a) lamp ON (b) lamp OFF
  37. 37.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 74. What happens?     (a) red LED ON (b) green LED ON
  38. 38.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  39. 39.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 420. What happens?     (a) lamp ON (b) lamp OFF
  40. 40.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Hot (c) Warm

Answer key

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

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