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Robotics Worksheet: Line Follower Program

Robotics lesson 24: Line-follower programs · Set 69 · 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 line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 65 and the right sensor reads 60. What does it do?     (a) turn left (b) go forward (c) turn right
  2. 2.⬛ Why does a line follower wiggle a little as it drives? (a) it is too cold (b) it is dancing (c) its wheels are square (d) it keeps fixing its path
  3. 3.⬛ Going too fast round a sharp bend, a line follower may … (a) grow wheels (b) turn into a car (c) lose the line (d) get heavier
  4. 4.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 15 and the right sensor reads 45. What does it do?     (a) go forward (b) turn right (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 }
    The left sensor sees white and the right sensor sees black. What does it do?     (a) go forward (b) turn left (c) turn right
  6. 6.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 46. What does it do?     (a) turn left (b) turn right
  7. 7.⬛ Left sensor sees black, right sensor sees white. Which way should a line follower turn? (a) right (b) backwards (c) left (d) nowhere
  8. 8.⬛ 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, black–white, white–white, white–white, black–white. How many times does it turn left?
  9. 9.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 15 and the right sensor reads 85. What does it do?     (a) go forward (b) turn right (c) turn left
  10. 10.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 50 and the right sensor reads 85. What does it do?     (a) turn right (b) turn left (c) go forward
  11. 11.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 61. What does it do?     (a) turn right (b) turn left
  12. 12.⬛ 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 15. What does it do?     (a) turn right (b) go forward (c) turn left
  13. 13.⬛ 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) go forward (b) turn left (c) turn right
  14. 14.⬛ 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 30. What does it do?     (a) turn left (b) go forward (c) turn right
  15. 15.⬛ 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) go forward (b) turn right (c) turn left
  16. 16.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 59. What does it do?     (a) turn right (b) turn left
  17. 17.⬛ 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–white, white–white, black–black, white–black. How many times does it turn left?
  18. 18.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 38. What does it do?     (a) turn right (b) turn left
  19. 19.⬛ 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 30. What does it do?     (a) go forward (b) turn left (c) turn right
  20. 20.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 60 and the right sensor reads 40. What does it do?     (a) turn left (b) go forward (c) turn right
  21. 21.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 21. What does it do?     (a) turn right (b) turn left
  22. 22.⬛ 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 white. What does it do?     (a) turn left (b) go forward (c) turn right
  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 6 times (left–right): black–white, white–white, white–white, black–white, white–black, black–black. How many times does it turn right?
  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 6 times (left–right): white–black, black–white, white–black, white–black, white–black, white–black. 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): white–white, white–black, black–black, white–white, white–white, white–white. How many times does it turn left?
  26. 26.⬛ 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 black. What does it do?     (a) turn left (b) turn right (c) go forward
  27. 27.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 65 and the right sensor reads 15. What does it do?     (a) turn right (b) go forward (c) turn left
  28. 28.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 42. What does it do?     (a) turn left (b) turn right
  29. 29.⬛ 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 85. What does it do?     (a) go forward (b) turn left (c) turn right
  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 6 times (left–right): black–black, white–white, white–black, black–white, black–white, black–black. How many times does it turn left?
  31. 31.⬛ 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 60. What does it do?     (a) turn left (b) turn right (c) go forward
  32. 32.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 85 and the right sensor reads 60. What does it do?     (a) turn left (b) go forward (c) turn right
  33. 33.⬛ 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) go forward (b) turn right (c) turn left
  34. 34.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 60. What does it do?     (a) turn right (b) turn left
  35. 35.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 90 and the right sensor reads 10. What does it do?     (a) go forward (b) turn left (c) turn right
  36. 36.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 30. What does it do?     (a) turn right (b) turn left
  37. 37.⬛ 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) turn left (c) go forward
  38. 38.⬛ 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 25. What does it do?     (a) turn left (b) turn right (c) go forward
  39. 39.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 90 and the right sensor reads 30. What does it do?     (a) turn left (b) turn right (c) go forward
  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) go forward (b) turn left (c) turn right

Answer key

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

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