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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 2 · 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) the else part (b) neither part (c) the if part (d) both parts
  2. 2.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 25 °C. What happens?     (a) fan ON (b) fan OFF
  3. 3.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 20 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  4. 4.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 158. What happens?     (a) lamp OFF (b) lamp ON
  5. 5.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 5 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 507. What happens?     (a) lamp OFF (b) lamp ON
  7. 7.🤖 “if (A AND B)” is true when … (a) both are false (b) only A is true (c) both A and B are true (d) only B is true
  8. 8.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  9. 9.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 54 %. What happens?     (a) pump OFF (b) pump ON
  10. 10.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 90. What happens?     (a) red LED ON (b) green LED ON
  11. 11.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 21 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  12. 12.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 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
  14. 14.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 620 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  15. 15.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 13 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  16. 16.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 22 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  17. 17.🤖 if (light < 400 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 (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  19. 19.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 430. What happens?     (a) lamp OFF (b) lamp ON
  20. 20.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 510 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 22 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  22. 22.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 18 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  23. 23.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 42 %. What happens?     (a) pump OFF (b) pump ON
  24. 24.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 36 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  25. 25.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 23 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  26. 26.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 70 %. What happens?     (a) pump ON (b) pump OFF
  27. 27.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  28. 28.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  29. 29.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 45 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  30. 30.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 560 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  31. 31.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  32. 32.🤖 if (light < 300 OR 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
  33. 33.🤖 if (light < 200 AND 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
  34. 34.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 88. What happens?     (a) red LED ON (b) green LED ON
  35. 35.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 270 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  36. 36.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 14 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  37. 37.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  38. 38.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  39. 39.🤖 if (temperature > 32) { fan ON } else { fan OFF }
    The temperature sensor reads 36 °C. What happens?     (a) fan ON (b) fan OFF
  40. 40.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 630 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON

Answer key

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

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