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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 979 · 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 (A AND B)” is true when … (a) only B is true (b) only A is true (c) both A and B are true (d) both are false
  2. 2.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  3. 3.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan OFF (b) fan ON
  4. 4.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) both parts (d) the if part
  7. 7.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 24 %. What happens?     (a) pump OFF (b) pump ON
  8. 8.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  9. 9.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 511. What happens?     (a) lamp OFF (b) lamp ON
  10. 10.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens?     (a) green LED ON (b) red LED ON
  11. 11.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 54 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  14. 14.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 4 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  15. 15.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  17. 17.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 78. What happens?     (a) red LED ON (b) green LED ON
  18. 18.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  19. 19.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  21. 21.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  22. 22.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  23. 23.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  24. 24.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  25. 25.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  26. 26.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 32 %. What happens?     (a) pump OFF (b) pump ON
  27. 27.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  28. 28.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 31 %. What happens?     (a) pump ON (b) pump OFF
  30. 30.🤖 if (light < 300 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 OFF (b) porch lamp ON
  31. 31.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  32. 32.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  33. 33.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 58 %. What happens?     (a) pump ON (b) pump OFF
  34. 34.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  36. 36.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  37. 37.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 91. What happens?     (a) lamp OFF (b) lamp ON
  38. 38.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 161. What happens?     (a) lamp ON (b) lamp OFF
  39. 39.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  40. 40.🤖 if (temperature > 34) { 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

Answer key

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

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