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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 952 · 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) { lamp ON } else { lamp OFF }
    The light sensor reads 312. What happens?     (a) lamp OFF (b) lamp ON
  2. 2.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  3. 3.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  4. 4.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) neither part (c) the else part (d) both parts
  7. 7.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 81. What happens?     (a) green LED ON (b) red LED ON
  8. 8.🤖 “if (A AND B)” is true when … (a) only B is true (b) both are false (c) only A is true (d) both A and B are true
  9. 9.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 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 ON (b) porch lamp OFF
  11. 11.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  13. 13.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 210 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) green LED ON (b) red LED ON
  15. 15.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  16. 16.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  17. 17.🤖 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
  18. 18.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 54. What happens?     (a) green LED ON (b) red LED ON
  19. 19.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  20. 20.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 14 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  21. 21.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  24. 24.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  25. 25.🤖 if (light < 200 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
  26. 26.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  27. 27.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 28 %. What happens?     (a) pump OFF (b) pump ON
  28. 28.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  29. 29.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  30. 30.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 93. What happens?     (a) red LED ON (b) green LED ON
  31. 31.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 40 °C. What happens?     (a) fan OFF (b) fan ON
  32. 32.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 63. What happens?     (a) red LED ON (b) green LED ON
  33. 33.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  34. 34.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  35. 35.🤖 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
  36. 36.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens?     (a) pump OFF (b) pump ON
  37. 37.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 29 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  38. 38.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 450. What happens?     (a) lamp OFF (b) lamp ON
  39. 39.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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