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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 645 · 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 (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 43 %. What happens?     (a) pump OFF (b) pump ON
  2. 2.🤖 if (light < 300 AND 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
  3. 3.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 284. What happens?     (a) lamp OFF (b) lamp ON
  4. 4.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  5. 5.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 365. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (light < 400 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
  7. 7.🤖 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
  8. 8.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) neither part (c) both parts (d) the if part
  9. 9.🤖 “if (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) only A is true (d) both are false
  10. 10.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  11. 11.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 562. What happens?     (a) lamp OFF (b) lamp ON
  12. 12.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  14. 14.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 46. What happens?     (a) red LED ON (b) green LED ON
  15. 15.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  16. 16.🤖 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 OFF (b) porch lamp ON
  17. 17.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  18. 18.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 56 %. What happens?     (a) pump ON (b) pump OFF
  20. 20.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 438. What happens?     (a) lamp OFF (b) lamp ON
  21. 21.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  24. 24.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 41. What happens?     (a) red LED ON (b) green LED ON
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (light < 200 OR 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
  30. 30.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  31. 31.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 33 %. What happens?     (a) pump ON (b) pump OFF
  32. 32.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 36 °C. What happens?     (a) fan OFF (b) fan ON
  33. 33.🤖 if (light < 200 OR 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
  34. 34.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON
  35. 35.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  37. 37.🤖 if (light < 200 OR 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
  38. 38.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  40. 40.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON

Answer key

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

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