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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 820 · 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 > 34) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 37 °C. What is shown?     (a) Warm (b) Cool (c) Hot
  2. 2.🤖 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
  3. 3.🤖 if (light < 300 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 600 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  4. 4.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 21) { 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 270 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  6. 6.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 410. What happens?     (a) lamp OFF (b) lamp ON
  7. 7.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 260 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  8. 8.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  9. 9.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 330 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  10. 10.🤖 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 OFF (b) porch lamp ON
  11. 11.🤖 if (sound > 60) { red LED ON } else { green LED ON }
    The sound sensor reads 77. What happens?     (a) green LED ON (b) red LED ON
  12. 12.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 27 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  13. 13.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 370 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  14. 14.🤖 if (light < 200 OR 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
  15. 15.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 21 °C. What happens?     (a) fan ON (b) fan OFF
  16. 16.🤖 if (temperature > 25) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan OFF (b) fan ON
  17. 17.🤖 “if (A AND B)” is true when … (a) only B is true (b) only A is true (c) both are false (d) both A and B are true
  18. 18.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 10 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 26 °C. What happens?     (a) fan OFF (b) fan ON
  20. 20.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens?     (a) fan ON (b) fan OFF
  21. 21.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 18 °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 23 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  23. 23.🤖 if (light < 400 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 210 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  24. 24.🤖 if (temperature > 38) { show “Hot” } else if (temperature > 19) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  25. 25.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 84. What happens?     (a) green LED ON (b) red LED ON
  26. 26.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 26 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  27. 27.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 29 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  28. 28.🤖 if (light < 400 OR 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
  29. 29.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 25) { show “Warm” } else { show “Cool” }
    The temperature is 44 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  30. 30.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 34 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  31. 31.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 67 %. What happens?     (a) pump ON (b) pump OFF
  32. 32.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 498. What happens?     (a) lamp ON (b) lamp OFF
  33. 33.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 60 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  34. 34.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 9 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  35. 35.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 392. What happens?     (a) lamp ON (b) lamp OFF
  36. 36.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 223. What happens?     (a) lamp ON (b) lamp OFF
  37. 37.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 110 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  38. 38.🤖 if (sound > 70) { red LED ON } else { green LED ON }
    The sound sensor reads 80. What happens?     (a) red LED ON (b) green LED ON
  39. 39.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 209. What happens?     (a) lamp OFF (b) lamp ON
  40. 40.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF

Answer key

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

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