← If / else with sensors lesson New set →

Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 763 · 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 < 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
  2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) the else part (d) both parts
  3. 3.🤖 “if (A AND B)” is true when … (a) both are false (b) only B is true (c) only A is true (d) both A and B are true
  4. 4.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 300 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 468. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 496. What happens?     (a) lamp ON (b) lamp OFF
  7. 7.🤖 if (light < 300 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 OFF (b) porch lamp ON
  8. 8.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan OFF (b) fan ON
  10. 10.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  11. 11.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  12. 12.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (light < 400 AND 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
  14. 14.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 46 %. What happens?     (a) pump OFF (b) pump ON
  15. 15.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 11 %. What happens?     (a) pump OFF (b) pump ON
  16. 16.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  17. 17.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  18. 18.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  19. 19.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  20. 20.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  21. 21.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  23. 23.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 38 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  24. 24.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  25. 25.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  27. 27.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  28. 28.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  29. 29.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  30. 30.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 210 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 36 °C. What happens?     (a) fan ON (b) fan OFF
  32. 32.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  33. 33.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan OFF (b) fan ON
  34. 34.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 40 °C. What happens?     (a) fan ON (b) fan OFF
  35. 35.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  36. 36.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 92. What happens?     (a) green LED ON (b) red LED ON
  37. 37.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  38. 38.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  39. 39.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  40. 40.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 476. What happens?     (a) lamp ON (b) lamp OFF

Answer key

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

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