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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 343 · 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 < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  2. 2.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  3. 3.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 100. What happens?     (a) red LED ON (b) green LED ON
  4. 4.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  5. 5.🤖 “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
  6. 6.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  7. 7.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  8. 8.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) neither part (c) both parts (d) the else part
  9. 9.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  10. 10.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 340 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 148. What happens?     (a) lamp OFF (b) lamp ON
  12. 12.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 32 %. What happens?     (a) pump OFF (b) pump ON
  14. 14.🤖 if (temperature > 33) { 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
  15. 15.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  17. 17.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  18. 18.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  19. 19.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  20. 20.🤖 if (light < 300 AND 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
  21. 21.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 360. What happens?     (a) lamp ON (b) lamp OFF
  22. 22.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  23. 23.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  25. 25.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 74. What happens?     (a) green LED ON (b) red LED ON
  26. 26.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  27. 27.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  28. 28.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  29. 29.🤖 if (light < 300 OR 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 > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan OFF (b) fan ON
  31. 31.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 271. What happens?     (a) lamp ON (b) lamp OFF
  33. 33.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 544. What happens?     (a) lamp OFF (b) lamp ON
  35. 35.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 42 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  36. 36.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 22 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  37. 37.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 15 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  38. 38.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 507. What happens?     (a) lamp OFF (b) lamp ON
  39. 39.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan OFF (b) fan ON
  40. 40.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 73. What happens?     (a) red LED ON (b) green LED ON

Answer key

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

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