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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 422 · 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 (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 71. What happens?     (a) red LED ON (b) green LED ON
  2. 2.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  3. 3.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  4. 4.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 67. What happens?     (a) green LED ON (b) red LED ON
  5. 5.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 56. What happens?     (a) red LED ON (b) green LED ON
  6. 6.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the else part (d) the if part
  7. 7.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  8. 8.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 23 %. What happens?     (a) pump ON (b) pump OFF
  9. 9.🤖 “if (A AND B)” is true when … (a) only A is true (b) both A and B are true (c) only B is true (d) both are false
  10. 10.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  11. 11.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  13. 13.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 516. What happens?     (a) lamp OFF (b) lamp ON
  14. 14.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 43 °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 28 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  16. 16.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  18. 18.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  20. 20.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  21. 21.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 33 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  22. 22.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  25. 25.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 75. What happens?     (a) green LED ON (b) red LED ON
  27. 27.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  28. 28.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  29. 29.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 550 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  32. 32.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 91. What happens?     (a) green LED ON (b) red LED ON
  33. 33.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  34. 34.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 73. What happens?     (a) red LED ON (b) green LED ON
  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) Hot (b) Cool (c) Warm
  36. 36.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  37. 37.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  38. 38.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  39. 39.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 621. What happens?     (a) lamp OFF (b) lamp ON
  40. 40.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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