← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 654 · 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 (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  2. 2.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 56 %. What happens?     (a) pump ON (b) pump OFF
  3. 3.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  4. 4.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan ON (b) fan OFF
  5. 5.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 93. What happens?     (a) green LED ON (b) red LED ON
  7. 7.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  8. 8.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) neither part (c) the else part (d) the if part
  9. 9.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  11. 11.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 25 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 98. What happens?     (a) green LED ON (b) red LED ON
  14. 14.🤖 “if (A AND B)” is true when … (a) only A is true (b) both A and B are true (c) only B is true (d) both are false
  15. 15.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  17. 17.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  18. 18.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  22. 22.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 169. What happens?     (a) lamp OFF (b) lamp ON
  23. 23.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  24. 24.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  25. 25.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump OFF (b) pump ON
  26. 26.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  27. 27.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °C. What happens?     (a) fan OFF (b) fan ON
  28. 28.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  29. 29.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  30. 30.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 60 %. What happens?     (a) pump OFF (b) pump ON
  32. 32.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  33. 33.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan OFF (b) fan ON
  34. 34.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  35. 35.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  36. 36.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 62. What happens?     (a) green LED ON (b) red LED ON
  39. 39.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 33 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  40. 40.🤖 if (light < 400 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

Answer key

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

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