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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 880 · 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 (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 508. What happens?     (a) lamp ON (b) lamp OFF
  2. 2.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan ON (b) fan OFF
  3. 3.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 44. What happens?     (a) red LED ON (b) green LED ON
  4. 4.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  6. 6.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 27 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  7. 7.🤖 if (temperature > 33) { 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
  8. 8.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  9. 9.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) both A and B are true (d) only A is true
  10. 10.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  11. 11.🤖 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
  12. 12.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  13. 13.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (light < 200 AND 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
  15. 15.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  16. 16.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  17. 17.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 74. What happens?     (a) red LED ON (b) green LED ON
  18. 18.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 68. What happens?     (a) green LED ON (b) red LED ON
  19. 19.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 53 %. What happens?     (a) pump ON (b) pump OFF
  20. 20.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 27 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  21. 21.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan OFF (b) fan ON
  22. 22.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  23. 23.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  24. 24.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (light < 200 AND 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
  26. 26.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 440 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 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
  28. 28.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  29. 29.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  30. 30.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  31. 31.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 293. What happens?     (a) lamp OFF (b) lamp ON
  32. 32.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  33. 33.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  34. 34.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 448. What happens?     (a) lamp ON (b) lamp OFF
  35. 35.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  37. 37.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 406. What happens?     (a) lamp ON (b) lamp OFF
  38. 38.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  40. 40.🤖 if (light < 300 OR 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

Answer key

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

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