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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 959 · 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 > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  2. 2.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only A is true (c) only B is true (d) both are false
  3. 3.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  4. 4.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  5. 5.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  6. 6.🤖 if (light < 200 OR 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
  7. 7.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 90. What happens?     (a) green LED ON (b) red LED ON
  8. 8.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) both parts (b) the if part (c) the else part (d) neither part
  9. 9.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 480 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  10. 10.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 100 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  11. 11.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  12. 12.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 216. What happens?     (a) lamp OFF (b) lamp ON
  13. 13.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 25 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  14. 14.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  15. 15.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 387. What happens?     (a) lamp ON (b) lamp OFF
  16. 16.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan OFF (b) fan ON
  17. 17.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 25 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  18. 18.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  20. 20.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 220 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 68 %. What happens?     (a) pump OFF (b) pump ON
  23. 23.🤖 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 ON (b) porch lamp OFF
  24. 24.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 45. What happens?     (a) green LED ON (b) red LED ON
  25. 25.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  26. 26.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 59 %. What happens?     (a) pump ON (b) pump OFF
  28. 28.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  29. 29.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  30. 30.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  31. 31.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 180. What happens?     (a) lamp ON (b) lamp OFF
  32. 32.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 63. What happens?     (a) green LED ON (b) red LED ON
  33. 33.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  34. 34.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 17 °C. What happens?     (a) fan OFF (b) fan ON
  35. 35.🤖 if (light < 300 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
  36. 36.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  37. 37.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 39 %. What happens?     (a) pump OFF (b) pump ON
  38. 38.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  39. 39.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 12 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  40. 40.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Warm (c) Hot

Answer key

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

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