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Electronics Worksheet: If Else with Sensors

Electronics lesson 24: If / else with sensors · Set 144 · 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 < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 411. What happens?     (a) lamp OFF (b) lamp ON
  2. 2.🤖 if (light < 200) { lamp ON } else { lamp OFF }
    The light sensor reads 54. What happens?     (a) lamp OFF (b) lamp ON
  3. 3.🤖 if (temperature > 34) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  4. 4.🤖 if (light < 300 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
  5. 5.🤖 if (temperature > 30) { show “Hot” } else if (temperature > 20) { show “Warm” } else { show “Cool” }
    The temperature is 38 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  6. 6.🤖 if (light < 200 AND 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
  7. 7.🤖 In “if (temp > 30)”, what runs when temp is exactly 30? (a) the else part (b) neither part (c) both parts (d) the if part
  8. 8.🤖 if (light < 200 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 360 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  9. 9.🤖 if (distance < 10) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 8 cm. What happens?     (a) buzzer is silent (b) buzzer beeps
  10. 10.🤖 if (light < 300 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 ON (b) porch lamp OFF
  11. 11.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 30 °C. What happens?     (a) fan OFF (b) fan ON
  12. 12.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 20 °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 550 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  14. 14.🤖 “if (A AND B)” is true when … (a) only A is true (b) both are false (c) both A and B are true (d) only B is true
  15. 15.🤖 if (temperature > 35) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 12 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  16. 16.🤖 if (light < 300 AND 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
  17. 17.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 24) { show “Warm” } else { show “Cool” }
    The temperature is 40 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  18. 18.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 26) { show “Warm” } else { show “Cool” }
    The temperature is 15 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  19. 19.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 24 °C. What happens?     (a) fan OFF (b) fan ON
  20. 20.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 43 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  21. 21.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 410. What happens?     (a) lamp OFF (b) lamp ON
  22. 22.🤖 if (temperature > 33) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 19 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  23. 23.🤖 if (temperature > 32) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 41 °C. What is shown?     (a) Cool (b) Hot (c) Warm
  24. 24.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 23) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Cool (b) Warm (c) Hot
  25. 25.🤖 if (light < 400 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 570 and motion is not detected (false). What happens?     (a) porch lamp ON (b) porch lamp OFF
  26. 26.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 290 and motion is detected (true). What happens?     (a) porch lamp ON (b) porch lamp OFF
  27. 27.🤖 if (light < 200 AND motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 170 and motion is not detected (false). What happens?     (a) porch lamp OFF (b) porch lamp ON
  28. 28.🤖 if (temperature > 30) { fan ON } else { fan OFF }
    The temperature sensor reads 32 °C. What happens?     (a) fan ON (b) fan OFF
  29. 29.🤖 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 OFF (b) porch lamp ON
  30. 30.🤖 if (light < 400) { lamp ON } else { lamp OFF }
    The light sensor reads 449. What happens?     (a) lamp ON (b) lamp OFF
  31. 31.🤖 if (temperature > 31) { show “Hot” } else if (temperature > 22) { show “Warm” } else { show “Cool” }
    The temperature is 16 °C. What is shown?     (a) Warm (b) Hot (c) Cool
  32. 32.🤖 if (distance < 15) { buzzer beeps } else { buzzer is silent }
    The distance sensor reads 9 cm. What happens?     (a) buzzer beeps (b) buzzer is silent
  33. 33.🤖 if (temperature > 36) { show “Hot” } else if (temperature > 18) { show “Warm” } else { show “Cool” }
    The temperature is 31 °C. What is shown?     (a) Hot (b) Cool (c) Warm
  34. 34.🤖 if (temperature > 28) { fan ON } else { fan OFF }
    The temperature sensor reads 35 °C. What happens?     (a) fan OFF (b) fan ON
  35. 35.🤖 if (temperature > 37) { show “Hot” } else if (temperature > 21) { show “Warm” } else { show “Cool” }
    The temperature is 28 °C. What is shown?     (a) Hot (b) Warm (c) Cool
  36. 36.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 290. What happens?     (a) lamp ON (b) lamp OFF
  37. 37.🤖 if (moisture < 50) { pump ON } else { pump OFF }
    The soil moisture sensor reads 48 %. What happens?     (a) pump OFF (b) pump ON
  38. 38.🤖 if (light < 300 OR motion) { porch lamp ON } else { porch lamp OFF }
    The light reading is 420 and motion is detected (true). What happens?     (a) porch lamp OFF (b) porch lamp ON
  39. 39.🤖 if (light < 500) { lamp ON } else { lamp OFF }
    The light sensor reads 421. What happens?     (a) lamp ON (b) lamp OFF
  40. 40.🤖 if (light < 300) { lamp ON } else { lamp OFF }
    The light sensor reads 343. What happens?     (a) lamp OFF (b) lamp ON

Answer key

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

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