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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 573 · 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 > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 36 °C. What happens?     (a) fan ON (b) fan OFF
  2. 2.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 64. What happens?     (a) red LED ON (b) green LED ON
  3. 3.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  4. 4.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  5. 5.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 68. What happens?     (a) green LED ON (b) red LED ON
  6. 6.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 450. What happens?     (a) lamp ON (b) lamp OFF
  7. 7.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 243. What happens?     (a) lamp ON (b) lamp OFF
  8. 8.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  9. 9.🤖 “if (A AND B)” is true when … (a) only A is true (b) only B is true (c) both are false (d) both A and B are true
  10. 10.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  12. 12.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  13. 13.🤖 if (light < 200 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
  14. 14.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 84. What happens?     (a) red LED ON (b) green LED ON
  16. 16.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 38 °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 170 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  18. 18.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  19. 19.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 350 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  20. 20.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  21. 21.🤖 if (light < 200 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
  22. 22.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  23. 23.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  24. 24.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 87. What happens?     (a) lamp ON (b) lamp OFF
  25. 25.🤖 if (light < 300 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
  26. 26.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 33 %. What happens?     (a) pump OFF (b) pump ON
  27. 27.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 380 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  28. 28.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 318. What happens?     (a) lamp ON (b) lamp OFF
  29. 29.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  30. 30.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the if part (c) both parts (d) the else part
  31. 31.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  32. 32.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  33. 33.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 246. What happens?     (a) lamp OFF (b) lamp ON
  34. 34.🤖 if (light < 400 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
  35. 35.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  36. 36.🤖 if (temperature > 33) { 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
  37. 37.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  38. 38.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 32 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  39. 39.🤖 if (temperature > 32) { 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
  40. 40.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Warm (c) Cool

Answer key

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

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