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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 410 · 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 (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 644. What happens?     (a) lamp OFF (b) lamp ON
  2. 2.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  3. 3.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 34 °C. What happens?     (a) fan OFF (b) fan ON
  4. 4.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 320 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  5. 5.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  6. 6.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  8. 8.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 58. What happens?     (a) lamp OFF (b) lamp ON
  9. 9.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  10. 10.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  11. 11.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 300 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  12. 12.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  13. 13.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  14. 14.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 32 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  15. 15.🤖 if (light < 400 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
  16. 16.🤖 if (light < 400 AND 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
  17. 17.🤖 if (light < 200 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 ON (b) porch lamp OFF
  18. 18.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 21 %. What happens?     (a) pump OFF (b) pump ON
  19. 19.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan OFF (b) fan ON
  20. 20.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) neither part (b) the else part (c) both parts (d) the if part
  21. 21.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  22. 22.🤖 if (light < 300 OR 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
  23. 23.🤖 “if (A AND B)” is true when … (a) only A is true (b) only B is true (c) both A and B are true (d) both are false
  24. 24.🤖 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 ON (b) porch lamp OFF
  25. 25.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 310 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  27. 27.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  28. 28.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  29. 29.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  30. 30.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  31. 31.🤖 if (moisture < 40) { pump ON } else { pump OFF }
    The soil moisture sensor reads 36 %. What happens?     (a) pump OFF (b) pump ON
  32. 32.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  33. 33.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 33 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  35. 35.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  36. 36.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  37. 37.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 17 %. What happens?     (a) pump OFF (b) pump ON
  38. 38.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 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 360 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  40. 40.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 520 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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