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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 94 · 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 (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
  2. 2.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  3. 3.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  4. 4.🤖 if (light < 200 AND 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
  5. 5.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  7. 7.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  8. 8.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan ON (b) fan OFF
  9. 9.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) both A and B are true (d) only B is true
  10. 10.🤖 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
  11. 11.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) the else part (c) the if part (d) neither part
  14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 96. What happens?     (a) red LED ON (b) green LED ON
  16. 16.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  17. 17.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 550 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  18. 18.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  19. 19.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 13 %. What happens?     (a) pump ON (b) pump OFF
  20. 20.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  21. 21.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  23. 23.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 33 °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) green LED ON (b) red LED ON
  25. 25.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  26. 26.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan ON (b) fan OFF
  27. 27.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  28. 28.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  29. 29.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  31. 31.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan ON (b) fan OFF
  32. 32.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  33. 33.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  35. 35.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 510. What happens?     (a) lamp OFF (b) lamp ON
  36. 36.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens?     (a) pump ON (b) pump OFF
  37. 37.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  38. 38.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 218. What happens?     (a) lamp OFF (b) lamp ON
  39. 39.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  40. 40.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Warm (c) Hot

Answer key

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

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