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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 717 · 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 > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  2. 2.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 49 %. What happens?     (a) pump ON (b) pump OFF
  3. 3.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 45 %. What happens?     (a) pump ON (b) pump OFF
  4. 4.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  5. 5.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 401. What happens?     (a) lamp ON (b) lamp OFF
  7. 7.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 282. What happens?     (a) lamp OFF (b) lamp ON
  8. 8.🤖 if (light < 300 OR 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
  9. 9.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  11. 11.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  12. 12.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) both A and B are true (d) only A is true
  14. 14.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) the if part (d) both parts
  15. 15.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 95. What happens?     (a) green LED ON (b) red LED ON
  16. 16.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan OFF (b) fan ON
  17. 17.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  18. 18.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  22. 22.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  23. 23.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  24. 24.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 56. What happens?     (a) green LED ON (b) red LED ON
  26. 26.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 220. What happens?     (a) lamp ON (b) lamp OFF
  28. 28.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  29. 29.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  30. 30.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 69 %. What happens?     (a) pump OFF (b) pump ON
  31. 31.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 177. What happens?     (a) lamp OFF (b) lamp ON
  32. 32.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan ON (b) fan OFF
  33. 33.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  34. 34.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  35. 35.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 452. What happens?     (a) lamp ON (b) lamp OFF
  36. 36.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan ON (b) fan OFF
  37. 37.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 373. What happens?     (a) lamp OFF (b) lamp ON
  40. 40.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm

Answer key

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

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