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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 33 · 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 (A AND B)” is true when … (a) both A and B are true (b) only A is true (c) only B is true (d) both are false
  2. 2.🤖 if (moisture < 30) { pump ON } else { pump OFF }
    The soil moisture sensor reads 22 %. What happens?     (a) pump ON (b) pump OFF
  3. 3.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  4. 4.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  5. 5.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the if part (b) both parts (c) neither part (d) the else part
  6. 6.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  7. 7.🤖 if (temperature > 34) { 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
  8. 8.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 70 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  9. 9.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  10. 10.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 540 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  11. 11.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 177. What happens?     (a) lamp ON (b) lamp OFF
  12. 12.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 578. What happens?     (a) lamp OFF (b) lamp ON
  13. 13.🤖 if (light < 200 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 OFF (b) porch lamp ON
  14. 14.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  15. 15.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 34 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  16. 16.🤖 if (sound > 80) { red LED ON } else { green LED ON }
    The sound sensor reads 66. What happens?     (a) green LED ON (b) red LED ON
  17. 17.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 46 %. What happens?     (a) pump OFF (b) pump ON
  18. 18.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 6 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  19. 19.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 19 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  20. 20.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 440 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  21. 21.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  22. 22.🤖 if (distance < 30) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 30 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  23. 23.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 17 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  24. 24.🤖 if (temperature > 32) { 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
  25. 25.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 150 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  26. 26.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 543. What happens?     (a) lamp ON (b) lamp OFF
  27. 27.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 20 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  28. 28.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  29. 29.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 295. What happens?     (a) lamp ON (b) lamp OFF
  30. 30.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  31. 31.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 30 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  32. 32.🤖 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 OFF (b) porch lamp ON
  33. 33.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 24 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  34. 34.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 281. What happens?     (a) lamp OFF (b) lamp ON
  35. 35.🤖 if (distance < 20) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 17 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  36. 36.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 90 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  37. 37.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 640 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  38. 38.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 120 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 473. What happens?     (a) lamp ON (b) lamp OFF
  40. 40.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 23 °C. What is shown?     (a) Warm (b) Cool (c) Hot

Answer key

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

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