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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 890 · 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 > 30) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  2. 2.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the else part (d) the if part
  3. 3.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  4. 4.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 65. What happens?     (a) red LED ON (b) green LED ON
  5. 5.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  6. 6.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 40 %. What happens?     (a) pump ON (b) pump OFF
  7. 7.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  8. 8.🤖 “if (A AND B)” is true when … (a) only B is true (b) only A is true (c) both are false (d) both A and B are true
  9. 9.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  11. 11.🤖 if (light < 200 OR 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
  12. 12.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 650 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  13. 13.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 31 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  14. 14.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 62. What happens?     (a) red LED ON (b) green LED ON
  15. 15.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  16. 16.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 470 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  17. 17.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  18. 18.🤖 if (light < 200 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
  19. 19.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 140 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  20. 20.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 25 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  21. 21.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 7 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  22. 22.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  23. 23.🤖 if (light < 300 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
  24. 24.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 422. What happens?     (a) lamp OFF (b) lamp ON
  25. 25.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 28 °C. What happens?     (a) fan OFF (b) fan ON
  26. 26.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens?     (a) fan ON (b) fan OFF
  28. 28.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 35 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  29. 29.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 37 °C. What happens?     (a) fan ON (b) fan OFF
  30. 30.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  31. 31.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  32. 32.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 190 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  33. 33.🤖 if (light < 200 AND 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
  34. 34.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 319. What happens?     (a) lamp OFF (b) lamp ON
  35. 35.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 580 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  36. 36.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  37. 37.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan OFF (b) fan ON
  38. 38.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  39. 39.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan ON (b) fan OFF
  40. 40.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 258. What happens?     (a) lamp ON (b) lamp OFF

Answer key

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

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