← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 916 · 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 (A AND B)” is true when … (a) only B is true (b) both A and B are true (c) only A is true (d) both are false
  2. 2.🤖 if (light < 300 OR 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
  3. 3.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 83. What happens?     (a) green LED ON (b) red LED ON
  4. 4.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 265. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  6. 6.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) the if part (c) neither part (d) the else part
  8. 8.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 50 %. What happens?     (a) pump ON (b) pump OFF
  9. 9.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  10. 10.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 56 %. What happens?     (a) pump OFF (b) pump ON
  11. 11.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  12. 12.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  13. 13.🤖 if (temperature > 32) { 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 < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  16. 16.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  17. 17.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 100. What happens?     (a) green LED ON (b) red LED ON
  18. 18.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  20. 20.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  22. 22.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 34 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  23. 23.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  24. 24.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  25. 25.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  27. 27.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  28. 28.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  29. 29.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  30. 30.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  31. 31.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump ON (b) pump OFF
  33. 33.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  34. 34.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  35. 35.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  36. 36.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 68. What happens?     (a) green LED ON (b) red LED ON
  37. 37.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  38. 38.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 18 %. What happens?     (a) pump OFF (b) pump ON
  39. 39.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 cm. What happens?     (a) buzzer beeps (b) buzzer is silent

Answer key

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

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