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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 489 · 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 < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  2. 2.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) both are false (c) only A is true (d) only B is true
  3. 3.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  4. 4.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 if (light < 300 AND 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
  6. 6.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 80. What happens?     (a) red LED ON (b) green LED ON
  7. 7.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  8. 8.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  9. 9.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  10. 10.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  11. 11.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 179. What happens?     (a) lamp OFF (b) lamp ON
  12. 12.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  14. 14.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  15. 15.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  16. 16.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  17. 17.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 64. What happens?     (a) green LED ON (b) red LED ON
  18. 18.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 544. What happens?     (a) lamp ON (b) lamp OFF
  19. 19.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 41 %. What happens?     (a) pump OFF (b) pump ON
  20. 20.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 58 %. What happens?     (a) pump OFF (b) pump ON
  22. 22.🤖 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
  23. 23.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 390 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  24. 24.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 13 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  25. 25.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  27. 27.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 490 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  28. 28.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  29. 29.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  30. 30.🤖 if (light < 400 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
  31. 31.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 103. What happens?     (a) lamp OFF (b) lamp ON
  33. 33.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  34. 34.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  35. 35.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  36. 36.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan OFF (b) fan ON
  37. 37.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  38. 38.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  39. 39.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  40. 40.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Warm (c) Hot

Answer key

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

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