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Robotics Worksheet: Line Follower Program

Robotics lesson 24: Line-follower programs · Set 52 · 40 questions
TalentJR

Robot tip (Turn towards the line): Left sees black → turn left; right sees black → turn right; both white → go forward. In an if / else if chain the first true rule wins (both black → the rule written first). With numbers: a reading below the threshold (for example below 40) means black.

NameDateTime takenScore ___ / 40
  1. 1.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 10. What does it do?     (a) turn right (b) turn left
  2. 2.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 68. What does it do?     (a) turn left (b) turn right
  3. 3.⬛ A line follower runs:
    if (right sees black) { turn right } else if (left sees black) { turn left } else { go forward }
    The left sensor sees white and the right sensor sees white. What does it do?     (a) turn right (b) go forward (c) turn left
  4. 4.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 20 and the right sensor reads 10. What does it do?     (a) turn right (b) go forward (c) turn left
  5. 5.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 4 times (left–right): white–black, white–black, white–black, white–white. How many times does it turn left?
  6. 6.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 25 and the right sensor reads 20. What does it do?     (a) turn right (b) turn left (c) go forward
  7. 7.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 5 times (left–right): white–black, white–white, black–white, black–black, black–white. How many times does it turn right?
  8. 8.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    The left sensor sees black and the right sensor sees white. What does it do?     (a) turn right (b) go forward (c) turn left
  9. 9.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 4 times (left–right): black–black, white–white, white–white, black–white. How many times does it turn left?
  10. 10.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    The left sensor sees white and the right sensor sees white. What does it do?     (a) turn left (b) go forward (c) turn right
  11. 11.⬛ A line follower runs:
    if (right sees black) { turn right } else if (left sees black) { turn left } else { go forward }
    The left sensor sees black and the right sensor sees black. What does it do?     (a) turn right (b) turn left (c) go forward
  12. 12.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 75 and the right sensor reads 60. What does it do?     (a) turn left (b) turn right (c) go forward
  13. 13.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 70 and the right sensor reads 30. What does it do?     (a) turn left (b) go forward (c) turn right
  14. 14.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 5 times (left–right): black–black, black–black, white–black, black–white, black–white. How many times does it turn right?
  15. 15.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 10 and the right sensor reads 50. What does it do?     (a) turn left (b) turn right (c) go forward
  16. 16.⬛ Why does a line follower wiggle a little as it drives? (a) it keeps fixing its path (b) it is dancing (c) its wheels are square (d) it is too cold
  17. 17.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 1. What does it do?     (a) turn right (b) turn left
  18. 18.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 6 times (left–right): black–black, white–black, white–white, black–black, black–white, white–black. How many times does it turn left?
  19. 19.⬛ Going too fast round a sharp bend, a line follower may … (a) lose the line (b) grow wheels (c) turn into a car (d) get heavier
  20. 20.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 56. What does it do?     (a) turn right (b) turn left
  21. 21.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 35 and the right sensor reads 55. What does it do?     (a) turn left (b) turn right (c) go forward
  22. 22.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 4 times (left–right): black–black, white–black, white–black, white–white. How many times does it turn left?
  23. 23.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 4 times (left–right): white–white, black–black, black–white, white–black. How many times does it turn left?
  24. 24.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 5 times (left–right): black–white, black–black, white–white, white–white, black–white. How many times does it turn left?
  25. 25.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 6 times (left–right): black–white, white–white, white–black, white–black, white–black, white–white. How many times does it turn left?
  26. 26.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 47. What does it do?     (a) turn left (b) turn right
  27. 27.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 6 times (left–right): black–black, white–black, black–white, black–white, white–black, white–white. How many times does it turn left?
  28. 28.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 10 and the right sensor reads 85. What does it do?     (a) turn left (b) go forward (c) turn right
  29. 29.⬛ Left sensor sees black, right sensor sees white. Which way should a line follower turn? (a) nowhere (b) right (c) left (d) backwards
  30. 30.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 5 times (left–right): white–black, black–black, black–white, black–white, black–white. How many times does it turn left?
  31. 31.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    The left sensor sees black and the right sensor sees black. What does it do?     (a) go forward (b) turn right (c) turn left
  32. 32.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 45 and the right sensor reads 30. What does it do?     (a) turn left (b) turn right (c) go forward
  33. 33.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 35 and the right sensor reads 60. What does it do?     (a) go forward (b) turn right (c) turn left
  34. 34.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 6 times (left–right): white–black, white–white, white–black, black–white, white–black, white–white. How many times does it turn right?
  35. 35.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 5 times (left–right): black–white, white–black, black–white, white–black, white–white. How many times does it turn right?
  36. 36.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 6 times (left–right): white–white, white–white, white–white, black–black, black–black, black–black. How many times does it turn left?
  37. 37.⬛ A line follower runs:
    if (left sees black) { turn left } else if (right sees black) { turn right } else { go forward }
    It checks its sensors 6 times (left–right): black–white, black–white, black–black, black–black, black–black, black–black. How many times does it turn left?
  38. 38.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 45 and the right sensor reads 50. What does it do?     (a) turn right (b) go forward (c) turn left
  39. 39.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 79. What does it do?     (a) turn right (b) turn left
  40. 40.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 45 and the right sensor reads 25. What does it do?     (a) turn left (b) turn right (c) go forward

Answer key

  1. turn right
  2. turn left
  3. go forward
  4. turn left
  5. 0
  6. turn left
  7. 1
  8. turn left
  9. 2
  10. go forward
  11. turn right
  12. go forward
  13. turn right
  14. 1
  15. turn left
  16. it keeps fixing its path
  17. turn right
  18. 3
  19. lose the line
  20. turn left
  21. turn left
  22. 1
  23. 2
  24. 3
  25. 1
  26. turn left
  27. 3
  28. turn left
  29. left
  30. 4
  31. turn left
  32. turn right
  33. turn left
  34. 3
  35. 2
  36. 3
  37. 6
  38. go forward
  39. turn left
  40. turn right

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