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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 919 · 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) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  2. 2.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  3. 3.🤖 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
  4. 4.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  5. 5.🤖 “if (A AND B)” is true when … (a) both are false (b) both A and B are true (c) only B is true (d) only A is true
  6. 6.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 396. What happens?     (a) lamp ON (b) lamp OFF
  7. 7.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  8. 8.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  9. 9.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 500 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 if (temperature > 33) { 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
  11. 11.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 70 %. What happens?     (a) pump ON (b) pump OFF
  13. 13.🤖 if (temperature > 37) { 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
  14. 14.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  16. 16.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  17. 17.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  18. 18.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  19. 19.🤖 if (light < 400 OR 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
  20. 20.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  21. 21.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 39 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  22. 22.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  23. 23.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 35 %. What happens?     (a) pump ON (b) pump OFF
  24. 24.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  25. 25.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 20 %. What happens?     (a) pump OFF (b) pump ON
  26. 26.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 36 °C. What happens?     (a) fan ON (b) fan OFF
  27. 27.🤖 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
  28. 28.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 41 %. What happens?     (a) pump OFF (b) pump ON
  29. 29.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  30. 30.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan ON (b) fan OFF
  31. 31.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan ON (b) fan OFF
  32. 32.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  33. 33.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  34. 34.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 29 °C. What happens?     (a) fan ON (b) fan OFF
  35. 35.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan OFF (b) fan ON
  36. 36.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  37. 37.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 22 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  38. 38.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 38 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  39. 39.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 610 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Hot (c) Cool

Answer key

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

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