← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 99 · 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 (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 38 %. What happens?     (a) pump OFF (b) pump ON
  2. 2.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  3. 3.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 57 %. What happens?     (a) pump ON (b) pump OFF
  4. 4.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 299. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 18 %. What happens?     (a) pump ON (b) pump OFF
  6. 6.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 28 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the else part (d) the if part
  8. 8.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan ON (b) fan OFF
  10. 10.🤖 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
  11. 11.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 16 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  13. 13.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  16. 16.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  17. 17.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  18. 18.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 70. What happens?     (a) red LED ON (b) green LED ON
  19. 19.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 341. What happens?     (a) lamp OFF (b) lamp ON
  20. 20.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 300 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  22. 22.🤖 if (light < 200 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
  23. 23.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  24. 24.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 322. What happens?     (a) lamp ON (b) lamp OFF
  25. 25.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  26. 26.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 553. What happens?     (a) lamp OFF (b) lamp ON
  27. 27.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 185. What happens?     (a) lamp OFF (b) lamp ON
  28. 28.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) only B is true (d) both A and B are true
  30. 30.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  33. 33.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  34. 34.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 32 %. What happens?     (a) pump OFF (b) pump ON
  35. 35.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 74. What happens?     (a) red LED ON (b) green LED ON
  36. 36.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  37. 37.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  38. 38.🤖 if (light < 400 OR 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
  39. 39.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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