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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 442 · 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 647. What happens?     (a) lamp OFF (b) lamp ON
  2. 2.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  3. 3.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 52. What happens?     (a) green LED ON (b) red LED ON
  4. 4.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 362. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  6. 6.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) the else part (c) neither part (d) the if part
  8. 8.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  9. 9.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan OFF (b) fan ON
  11. 11.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  12. 12.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  13. 13.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  14. 14.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) only A is true (d) both A and B are true
  15. 15.🤖 if (light < 200 AND 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
  16. 16.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (light < 200 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 ON (b) porch lamp OFF
  18. 18.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  19. 19.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  20. 20.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 578. What happens?     (a) lamp ON (b) lamp OFF
  21. 21.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 39 %. What happens?     (a) pump ON (b) pump OFF
  22. 22.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  23. 23.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 50 %. What happens?     (a) pump OFF (b) pump ON
  24. 24.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 89. What happens?     (a) red LED ON (b) green LED ON
  25. 25.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  26. 26.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 52 %. What happens?     (a) pump ON (b) pump OFF
  27. 27.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  28. 28.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 231. What happens?     (a) lamp ON (b) lamp OFF
  29. 29.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 289. What happens?     (a) lamp ON (b) lamp OFF
  33. 33.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 43. What happens?     (a) green LED ON (b) red LED ON
  34. 34.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  35. 35.🤖 if (temperature > 38) { 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
  36. 36.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 58 %. What happens?     (a) pump ON (b) pump OFF
  37. 37.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 327. What happens?     (a) lamp ON (b) lamp OFF
  38. 38.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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