← Line-follower programs lesson New set →

Robotics Worksheet: Line Follower Program

Robotics lesson 24: Line-follower programs · Set 363 · 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 < 30) { turn right } else { turn left }
    The sensor reads 38. What does it do?     (a) turn right (b) turn left
  2. 2.⬛ 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
  3. 3.⬛ 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 75. What does it do?     (a) go forward (b) turn left (c) turn right
  4. 4.⬛ 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) 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 }
    The left sensor sees white and the right sensor sees white. What does it do?     (a) turn left (b) turn right (c) go forward
  6. 6.⬛ Left sensor sees black, right sensor sees white. Which way should a line follower turn? (a) right (b) left (c) backwards (d) nowhere
  7. 7.⬛ 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) go forward (c) turn left
  8. 8.⬛ 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 90. What does it do?     (a) turn left (b) turn right (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 }
    It checks its sensors 6 times (left–right): white–white, black–black, black–white, white–white, white–white, white–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 }
    It checks its sensors 6 times (left–right): white–white, black–black, black–black, black–white, white–white, black–black. How many times does it turn right?
  11. 11.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 74. 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 50 and the right sensor reads 65. What does it do?     (a) turn right (b) go forward (c) turn left
  13. 13.⬛ Going too fast round a sharp bend, a line follower may … (a) turn into a car (b) grow wheels (c) lose the line (d) get heavier
  14. 14.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 52. What does it do?     (a) turn left (b) turn right
  15. 15.⬛ 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
  16. 16.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 63. What does it do?     (a) turn left (b) turn right
  17. 17.⬛ 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
  18. 18.⬛ 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
  19. 19.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 80 and the right sensor reads 25. 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 white and the right sensor sees black. 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 }
    The left sensor sees black and the right sensor sees white. What does it do?     (a) turn right (b) go forward (c) turn left
  22. 22.⬛ 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 90. What does it do?     (a) turn left (b) go forward (c) turn right
  23. 23.⬛ 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
  24. 24.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 70. What does it do?     (a) turn left (b) turn right
  25. 25.⬛ 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 50. What does it do?     (a) turn right (b) go forward (c) turn left
  26. 26.⬛ 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
  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–white, white–white, white–white, white–white, black–black, white–black. How many times does it turn right?
  28. 28.⬛ 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 35. What does it do?     (a) turn left (b) go forward (c) 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 6 times (left–right): black–white, black–black, black–white, black–black, black–white, white–white. How many times does it turn left?
  30. 30.⬛ 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 80. What does it do?     (a) go forward (b) turn left (c) turn right
  31. 31.⬛ A line follower runs:
    if (left < 40) { turn left } else if (right < 40) { turn right } else { go forward }
    The left sensor reads 30 and the right sensor reads 30. What does it do?     (a) go forward (b) turn left (c) turn right
  32. 32.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 56. What does it do?     (a) turn right (b) turn left
  33. 33.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 16. What does it do?     (a) turn right (b) 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 58. What does it do?     (a) turn right (b) turn left
  35. 35.⬛ 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
  36. 36.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 20. 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 }
    It checks its sensors 5 times (left–right): white–black, white–white, white–white, white–black, white–black. How many times does it turn left?
  38. 38.⬛ 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–black, black–black, white–black, white–black. How many times does it turn right?
  39. 39.⬛ 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, black–black, white–white, white–white, black–black. How many times does it 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): black–black, black–white, white–black, black–black, black–black. How many times does it turn left?

Answer key

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

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