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Robotics Worksheet: Line Follower Program

Robotics lesson 24: Line-follower programs · Set 62 · 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 64. What does it do?     (a) turn right (b) turn left
  2. 2.⬛ 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 80. What does it do?     (a) go forward (b) turn right (c) turn left
  3. 3.⬛ 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 right (b) turn left (c) go forward
  4. 4.⬛ 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, black–white, white–black, white–black. How many times does it turn left?
  5. 5.⬛ 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 65. What does it do?     (a) turn right (b) turn left (c) go forward
  6. 6.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 49. What does it do?     (a) turn left (b) turn right
  7. 7.⬛ 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 45. What does it do?     (a) turn right (b) turn left (c) go forward
  8. 8.⬛ 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 right (b) turn left (c) go forward
  9. 9.⬛ 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 left (b) turn right (c) go forward
  10. 10.⬛ Going too fast round a sharp bend, a line follower may … (a) lose the line (b) get heavier (c) grow wheels (d) turn into a car
  11. 11.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 27. What does it do?     (a) turn left (b) turn right
  12. 12.⬛ 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, white–white, black–white, white–white, white–white. How many times does it turn right?
  13. 13.⬛ Left sensor sees black, right sensor sees white. Which way should a line follower turn? (a) right (b) backwards (c) nowhere (d) left
  14. 14.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 40. What does it do?     (a) turn left (b) turn right
  15. 15.⬛ 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
  16. 16.⬛ 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
  17. 17.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 53. What does it do?     (a) turn left (b) turn right
  18. 18.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 17. What does it do?     (a) turn left (b) turn right
  19. 19.⬛ 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
  20. 20.⬛ 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
  21. 21.⬛ 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 15. What does it do?     (a) turn left (b) go forward (c) turn right
  22. 22.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 49. What does it do?     (a) turn right (b) 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 6 times (left–right): black–white, black–black, black–white, black–white, black–white, white–black. How many times does it turn right?
  24. 24.⬛ 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 90. What does it do?     (a) turn right (b) turn left (c) go forward
  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–black, white–white, white–black, white–white, black–white, black–white. How many times does it turn left?
  26. 26.⬛ 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 80. What does it do?     (a) turn right (b) go forward (c) turn left
  27. 27.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 40 and the right sensor reads 60. What does it do?     (a) turn left (b) go forward (c) turn right
  28. 28.⬛ 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–white, white–black, white–white, white–black. How many times does it turn right?
  29. 29.⬛ 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, black–white, white–white, black–black. How many times does it turn right?
  30. 30.⬛ 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 15. What does it do?     (a) turn right (b) go forward (c) turn left
  31. 31.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 14. What does it do?     (a) turn right (b) 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 70 and the right sensor reads 65. What does it do?     (a) turn left (b) go forward (c) turn right
  33. 33.⬛ 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–black, white–black, white–white, white–white, black–black. How many times does it turn left?
  34. 34.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 50. What does it do?     (a) turn right (b) turn left
  35. 35.⬛ 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 left (b) go forward (c) 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 4 times (left–right): white–white, white–white, black–white, white–white. 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 }
    The left sensor sees black and the right sensor sees white. What does it do?     (a) turn left (b) turn right (c) go forward
  38. 38.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 20. What does it do?     (a) turn left (b) turn right
  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 65. What does it do?     (a) turn right (b) go forward (c) turn left
  40. 40.⬛ 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, white–black, black–white. How many times does it turn right?

Answer key

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

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