← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 177 · 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) both parts (b) neither part (c) the if part (d) the else part
  2. 2.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  3. 3.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  4. 4.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens?     (a) green LED ON (b) red LED ON
  5. 5.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) both A and B are true (d) only A is true
  6. 6.🤖 if (light < 400 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
  7. 7.🤖 if (temperature > 30) { 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
  8. 8.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 17 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  9. 9.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  10. 10.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  11. 11.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan ON (b) fan OFF
  12. 12.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  14. 14.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 323. What happens?     (a) lamp OFF (b) lamp ON
  15. 15.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 519. What happens?     (a) lamp OFF (b) lamp ON
  16. 16.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  17. 17.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 44. What happens?     (a) red LED ON (b) green LED ON
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 45 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  20. 20.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 377. What happens?     (a) lamp OFF (b) lamp ON
  22. 22.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  23. 23.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  24. 24.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens?     (a) fan OFF (b) fan ON
  25. 25.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  27. 27.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 590 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  28. 28.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 25 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  29. 29.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 402. What happens?     (a) lamp ON (b) lamp OFF
  30. 30.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  31. 31.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 421. What happens?     (a) lamp ON (b) lamp OFF
  32. 32.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  33. 33.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 490 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  34. 34.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  36. 36.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 134. What happens?     (a) lamp ON (b) lamp OFF
  37. 37.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  40. 40.🤖 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

Answer key

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

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