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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 808 · 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 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 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) both parts (b) neither part (c) the else part (d) the if part
  3. 3.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 55 %. What happens?     (a) pump OFF (b) pump ON
  4. 4.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 276. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  6. 6.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  7. 7.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  8. 8.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  9. 9.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 37 %. What happens?     (a) pump ON (b) pump OFF
  11. 11.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens?     (a) pump ON (b) pump OFF
  12. 12.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan OFF (b) fan ON
  13. 13.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  14. 14.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  15. 15.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  16. 16.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  17. 17.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 16 %. What happens?     (a) pump OFF (b) pump ON
  18. 18.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 528. What happens?     (a) lamp ON (b) lamp OFF
  20. 20.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  21. 21.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 68. What happens?     (a) green LED ON (b) red LED ON
  22. 22.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 11 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  23. 23.🤖 “if (A AND B)” is true when … (a) only B is true (b) only A is true (c) both A and B are true (d) both are false
  24. 24.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 83. What happens?     (a) red LED ON (b) green LED ON
  25. 25.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  26. 26.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  27. 27.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  28. 28.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan ON (b) fan OFF
  29. 29.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  30. 30.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 64. What happens?     (a) lamp ON (b) lamp OFF
  31. 31.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  33. 33.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  35. 35.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  36. 36.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  37. 37.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 431. What happens?     (a) lamp OFF (b) lamp ON
  38. 38.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  39. 39.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Hot (b) Cool (c) Warm

Answer key

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

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