← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 914 · 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 (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 58. What happens?     (a) red LED ON (b) green LED ON
  2. 2.🤖 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
  3. 3.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  4. 4.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  6. 6.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 460 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  8. 8.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  9. 9.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 364. What happens?     (a) lamp OFF (b) lamp ON
  10. 10.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 311. What happens?     (a) lamp OFF (b) lamp ON
  11. 11.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  13. 13.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  14. 14.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  15. 15.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only B is true (c) only A is true (d) both are false
  16. 16.🤖 if (light < 300 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 OFF (b) porch lamp ON
  17. 17.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  19. 19.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  21. 21.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  22. 22.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (light < 300 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
  24. 24.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  27. 27.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  28. 28.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  29. 29.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  30. 30.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 430 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  32. 32.🤖 if (light < 400 OR 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
  33. 33.🤖 if (temperature > 34) { 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
  34. 34.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 21 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  36. 36.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  37. 37.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  38. 38.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 50. What happens?     (a) green LED ON (b) red LED ON
  39. 39.🤖 if (light < 300 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
  40. 40.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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