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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 666 · 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 > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  2. 2.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 19 °C. What happens?     (a) fan ON (b) fan OFF
  3. 3.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) neither part (c) both parts (d) the else part
  4. 4.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 227. What happens?     (a) lamp ON (b) lamp OFF
  5. 5.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump OFF (b) pump ON
  6. 6.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  7. 7.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) only B is true (d) both A and B are true
  8. 8.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  9. 9.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 43 %. What happens?     (a) pump ON (b) pump 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 ON (b) porch lamp OFF
  11. 11.🤖 if (light < 200 OR 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 (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  13. 13.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 100. What happens?     (a) lamp OFF (b) lamp ON
  14. 14.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  15. 15.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  16. 16.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  17. 17.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 27 °C. What happens?     (a) fan OFF (b) fan ON
  18. 18.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 48 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  20. 20.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  21. 21.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  22. 22.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 50 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  23. 23.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 410. What happens?     (a) lamp ON (b) lamp OFF
  24. 24.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  25. 25.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 130 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 22 %. What happens?     (a) pump ON (b) pump OFF
  27. 27.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 177. What happens?     (a) lamp OFF (b) lamp ON
  28. 28.🤖 if (light < 300 AND 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
  29. 29.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 69. What happens?     (a) green LED ON (b) red LED ON
  30. 30.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 24 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  31. 31.🤖 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
  32. 32.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  33. 33.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 635. What happens?     (a) lamp OFF (b) lamp ON
  34. 34.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  35. 35.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  36. 36.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  37. 37.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) red LED ON (b) green LED ON
  39. 39.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 200 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 17 cm. What happens?     (a) buzzer is silent (b) buzzer beeps

Answer key

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

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