← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 491 · 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.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) the else part (d) both parts
  2. 2.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  3. 3.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 619. What happens?     (a) lamp OFF (b) lamp ON
  4. 4.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 99. What happens?     (a) green LED ON (b) red LED ON
  5. 5.🤖 “if (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) both are false (d) only A is true
  6. 6.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 82. What happens?     (a) green LED ON (b) red LED ON
  7. 7.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  8. 8.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 15 %. What happens?     (a) pump ON (b) pump OFF
  9. 9.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  10. 10.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 362. What happens?     (a) lamp ON (b) lamp OFF
  11. 11.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 593. What happens?     (a) lamp ON (b) lamp OFF
  12. 12.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (light < 400 OR 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
  14. 14.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 27 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  15. 15.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  16. 16.🤖 if (light < 200 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
  17. 17.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 25 %. What happens?     (a) pump ON (b) pump OFF
  18. 18.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  19. 19.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  22. 22.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 78. What happens?     (a) red LED ON (b) green LED ON
  23. 23.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  24. 24.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  25. 25.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 23 °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 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  27. 27.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  28. 28.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  29. 29.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  31. 31.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  32. 32.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  33. 33.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  34. 34.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  35. 35.🤖 if (light < 200 OR 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
  36. 36.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  38. 38.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  39. 39.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  40. 40.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Warm (c) Hot

Answer key

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

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