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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 394 · 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.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) both parts (c) the if part (d) the else part
  2. 2.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  3. 3.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 450 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  5. 5.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 530 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  6. 6.🤖 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 OFF (b) porch lamp ON
  7. 7.🤖 if (light < 300 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
  8. 8.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  9. 9.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  10. 10.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 23 °C. What happens?     (a) fan OFF (b) fan ON
  11. 11.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 180 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  13. 13.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 519. What happens?     (a) lamp ON (b) lamp OFF
  14. 14.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  15. 15.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  16. 16.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 62 %. What happens?     (a) pump ON (b) pump OFF
  17. 17.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 22 °C. What happens?     (a) fan ON (b) fan OFF
  18. 18.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 67 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 31 °C. What happens?     (a) fan ON (b) fan OFF
  20. 20.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  21. 21.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 23 %. What happens?     (a) pump ON (b) pump OFF
  22. 22.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 21 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  23. 23.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan OFF (b) fan ON
  24. 24.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 25 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  25. 25.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  27. 27.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  28. 28.🤖 if (temperature > 37) { 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
  29. 29.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  30. 30.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 11 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  31. 31.🤖 “if (A AND B)” is true when … (a) both A and B are true (b) only B is true (c) both are false (d) only A is true
  32. 32.🤖 if (light < 200 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
  33. 33.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 33 °C. What happens?     (a) fan ON (b) fan OFF
  35. 35.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 410 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  36. 36.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 230 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 277. What happens?     (a) lamp OFF (b) lamp ON
  38. 38.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  39. 39.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 400 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  40. 40.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Warm (c) Hot

Answer key

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

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