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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 848 · 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) neither part (b) the if part (c) the else part (d) both parts
  2. 2.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 42. What happens?     (a) green LED ON (b) red LED ON
  3. 3.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  4. 4.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump ON (b) pump OFF
  5. 5.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 166. What happens?     (a) lamp ON (b) lamp OFF
  6. 6.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  7. 7.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  8. 8.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  9. 9.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 407. What happens?     (a) lamp OFF (b) lamp ON
  10. 10.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 36 °C. What happens?     (a) fan ON (b) fan OFF
  11. 11.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) both A and B are true (d) only A is true
  12. 12.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  13. 13.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  15. 15.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  16. 16.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  17. 17.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 45 %. What happens?     (a) pump ON (b) pump OFF
  18. 18.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  19. 19.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  20. 20.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 109. What happens?     (a) lamp ON (b) lamp OFF
  21. 21.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 202. What happens?     (a) lamp OFF (b) lamp ON
  22. 22.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  24. 24.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 414. What happens?     (a) lamp OFF (b) lamp ON
  25. 25.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  26. 26.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 47 %. What happens?     (a) pump ON (b) pump OFF
  27. 27.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 75. What happens?     (a) red LED ON (b) green LED ON
  28. 28.🤖 if (light < 200 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
  29. 29.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  33. 33.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  34. 34.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 54. What happens?     (a) red LED ON (b) green LED ON
  35. 35.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  36. 36.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 35 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  37. 37.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  38. 38.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) green LED ON (b) red LED ON
  39. 39.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  40. 40.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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