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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 913 · 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 < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump ON (b) pump OFF
  2. 2.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  3. 3.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 207. What happens?     (a) lamp OFF (b) lamp ON
  4. 4.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  6. 6.🤖 “if (A AND B)” is true when … (a) only A is true (b) only B is true (c) both A and B are true (d) both are false
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) neither part (c) the else part (d) both parts
  8. 8.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 19 %. What happens?     (a) pump ON (b) pump OFF
  9. 9.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  10. 10.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 585. What happens?     (a) lamp ON (b) lamp OFF
  11. 11.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) green LED ON (b) red LED ON
  12. 12.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 87. What happens?     (a) green LED ON (b) red LED ON
  13. 13.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 43 %. What happens?     (a) pump OFF (b) pump ON
  15. 15.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  16. 16.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 49 %. What happens?     (a) pump ON (b) pump OFF
  18. 18.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  19. 19.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  20. 20.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  22. 22.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  24. 24.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  26. 26.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  27. 27.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  28. 28.🤖 if (light < 400 OR 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
  29. 29.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  30. 30.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 177. What happens?     (a) lamp ON (b) lamp OFF
  31. 31.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  33. 33.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  34. 34.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  35. 35.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  37. 37.🤖 if (light < 400 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
  38. 38.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  39. 39.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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