← Line-follower programs lesson New set →

Robotics Worksheet: Line Follower Program

Robotics lesson 24: Line-follower programs · Set 322 · 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 < 50) { turn right } else { turn left }
    The sensor reads 44. What does it do?     (a) turn right (b) turn left
  2. 2.⬛ Going too fast round a sharp bend, a line follower may … (a) turn into a car (b) get heavier (c) grow wheels (d) lose the line
  3. 3.⬛ 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 65. What does it do?     (a) turn left (b) turn right (c) go forward
  4. 4.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 51. What does it do?     (a) turn right (b) turn left
  5. 5.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 39. What does it do?     (a) turn right (b) 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 65 and the right sensor reads 90. What does it do?     (a) turn right (b) go forward (c) turn left
  7. 7.⬛ 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 35. What does it do?     (a) turn right (b) turn left (c) go forward
  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) turn left (c) go forward
  9. 9.⬛ 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
  10. 10.⬛ Why does a line follower wiggle a little as it drives? (a) its wheels are square (b) it is dancing (c) it is too cold (d) it keeps fixing its path
  11. 11.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 4. What does it do?     (a) turn right (b) turn left
  12. 12.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 24. What does it do?     (a) turn right (b) turn left
  13. 13.⬛ 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 20. What does it do?     (a) go forward (b) turn right (c) turn left
  14. 14.⬛ 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 65. What does it do?     (a) turn right (b) turn left (c) go forward
  15. 15.⬛ 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–black, white–black, black–white. How many times does it turn right?
  16. 16.⬛ 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 right?
  17. 17.⬛ 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 right (c) turn left
  18. 18.⬛ 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) go forward (c) 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 75 and the right sensor reads 60. What does it do?     (a) turn right (b) turn left (c) go forward
  20. 20.⬛ 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 right (b) turn left (c) go forward
  21. 21.⬛ 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, black–black, white–white, black–black. How many times does it turn left?
  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 6 times (left–right): white–white, black–white, white–white, white–white, black–white, black–white. How many times does it 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 4 times (left–right): white–white, white–white, black–white, white–white. How many times does it turn right?
  24. 24.⬛ 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
  25. 25.⬛ 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
  26. 26.⬛ Left sensor sees black, right sensor sees white. Which way should a line follower turn? (a) backwards (b) right (c) nowhere (d) left
  27. 27.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 62. What does it do?     (a) turn right (b) turn left
  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 4 times (left–right): white–black, black–white, black–white, white–white. How many times does it turn right?
  29. 29.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 23. What does it do?     (a) turn left (b) turn right
  30. 30.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 43. What does it do?     (a) turn right (b) 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 80. What does it do?     (a) turn left (b) go forward (c) turn right
  32. 32.⬛ 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 85. What does it do?     (a) turn right (b) go forward (c) turn left
  33. 33.⬛ 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) turn right (b) turn left (c) go forward
  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 5 times (left–right): white–black, white–white, white–white, black–white, black–black. How many times does it turn left?
  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 4 times (left–right): black–white, black–white, black–black, white–white. How many times does it turn right?
  36. 36.⬛ 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 45. What does it do?     (a) turn right (b) turn left (c) go forward
  37. 37.⬛ 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 75. What does it do?     (a) go forward (b) turn left (c) turn right
  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 35. What does it do?     (a) turn right (b) turn left (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 35 and the right sensor reads 50. What does it do?     (a) turn left (b) go forward (c) turn right
  40. 40.⬛ 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 right (c) turn left

Answer key

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

Free robotics lessons, practice and worksheets at talentjr.in/robotics-for-kids