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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 64 · 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 (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  2. 2.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  3. 3.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  4. 4.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) both A and B are true (d) only B is true
  5. 5.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  6. 6.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) both parts (c) neither part (d) the if part
  8. 8.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 86. What happens?     (a) green LED ON (b) red LED ON
  9. 9.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 62. What happens?     (a) green LED ON (b) red LED ON
  12. 12.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  13. 13.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 241. What happens?     (a) lamp ON (b) lamp OFF
  14. 14.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  15. 15.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  16. 16.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 280 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  17. 17.🤖 if (temperature > 30) { 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
  18. 18.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 250 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 160 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  20. 20.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  21. 21.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  22. 22.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 435. What happens?     (a) lamp ON (b) lamp OFF
  23. 23.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  24. 24.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  25. 25.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 42. What happens?     (a) red LED ON (b) green LED ON
  26. 26.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 26 %. What happens?     (a) pump OFF (b) pump ON
  27. 27.🤖 if (light < 200 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 ON (b) porch lamp OFF
  28. 28.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  29. 29.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  30. 30.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 243. What happens?     (a) lamp ON (b) lamp OFF
  33. 33.🤖 if (light < 300 OR 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
  34. 34.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 63 %. What happens?     (a) pump OFF (b) pump ON
  35. 35.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 91. What happens?     (a) green LED ON (b) red LED ON
  36. 36.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 361. What happens?     (a) lamp ON (b) lamp OFF
  37. 37.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  38. 38.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 2 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  39. 39.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  40. 40.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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