← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 631 · 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 > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) the else part (c) both parts (d) neither part
  3. 3.🤖 “if (A AND B)” is true when … (a) both are false (b) both A and B are true (c) only B is true (d) only A is true
  4. 4.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 49 %. What happens?     (a) pump ON (b) pump OFF
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 362. What happens?     (a) lamp OFF (b) lamp ON
  7. 7.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  8. 8.🤖 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 ON (b) porch lamp OFF
  9. 9.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  11. 11.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  16. 16.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  17. 17.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  18. 18.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan OFF (b) fan ON
  20. 20.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  22. 22.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  23. 23.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  24. 24.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 21 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  25. 25.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  26. 26.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  27. 27.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  28. 28.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  29. 29.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 34 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  30. 30.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  33. 33.🤖 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
  34. 34.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 22 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  35. 35.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  36. 36.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  38. 38.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 80 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens?     (a) red LED ON (b) green LED ON
  40. 40.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 253. What happens?     (a) lamp ON (b) lamp OFF

Answer key

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

Free electronics lessons, practice and worksheets at talentjr.in/electronics-for-kids