← Line-follower programs lesson New set →

Robotics Worksheet: Line Follower Program

Robotics lesson 24: Line-follower programs · Set 274 · 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 47. What does it do?     (a) turn left (b) turn right
  2. 2.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 45. 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 black. What does it do?     (a) turn left (b) turn right (c) go forward
  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 80. What does it do?     (a) turn left (b) turn right (c) go forward
  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 5 times (left–right): white–black, black–black, white–white, white–white, 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 50 and the right sensor reads 25. What does it do?     (a) turn left (b) turn right (c) go forward
  7. 7.⬛ 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 85. What does it do?     (a) go forward (b) turn left (c) 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 white and the right sensor sees white. What does it do?     (a) turn right (b) turn left (c) go forward
  9. 9.⬛ Why does a line follower wiggle a little as it drives? (a) it is too cold (b) its wheels are square (c) it keeps fixing its path (d) it is dancing
  10. 10.⬛ 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 50. What does it do?     (a) go forward (b) turn right (c) turn left
  11. 11.⬛ 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 65. What does it do?     (a) turn left (b) turn right (c) go forward
  12. 12.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 48. What does it do?     (a) turn right (b) turn left
  13. 13.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 6. What does it do?     (a) turn right (b) turn left
  14. 14.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 37. 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 33. What does it do?     (a) turn right (b) turn left
  16. 16.⬛ 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 15. What does it do?     (a) turn right (b) turn left (c) go forward
  17. 17.⬛ Left sensor sees black, right sensor sees white. Which way should a line follower turn? (a) backwards (b) right (c) nowhere (d) 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 70 and the right sensor reads 15. What does it do?     (a) go forward (b) turn left (c) turn right
  19. 19.⬛ 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
  20. 20.⬛ 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 left (b) turn right (c) go forward
  21. 21.⬛ 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 left (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 39. What does it do?     (a) turn right (b) turn left
  23. 23.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 18. What does it do?     (a) turn right (b) turn left
  24. 24.⬛ 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 right (b) turn left
  25. 25.⬛ 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) turn left (b) go forward (c) turn right
  26. 26.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 45. 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, black–black, white–white, white–white, white–white, black–white. How many times does it turn right?
  28. 28.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 35. What does it do?     (a) turn left (b) turn right
  29. 29.⬛ Going too fast round a sharp bend, a line follower may … (a) get heavier (b) lose the line (c) turn into a car (d) grow wheels
  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–white, black–black, black–white, white–white, black–white. How many times does it turn right?
  31. 31.⬛ 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–white, black–black, white–black. How many times does it turn right?
  32. 32.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 26. What does it do?     (a) turn right (b) turn left
  33. 33.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 22. What does it do?     (a) turn right (b) 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 4 times (left–right): white–white, black–white, black–black, black–white. How many times does it turn right?
  35. 35.⬛ A one-sensor robot follows the edge of a line:
    if (light < 40) { turn right } else { turn left }
    The sensor reads 12. What does it do?     (a) turn left (b) 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): black–black, black–white, black–black, black–black. How many times does it turn right?
  37. 37.⬛ A one-sensor robot follows the edge of a line:
    if (light < 30) { turn right } else { turn left }
    The sensor reads 37. What does it do?     (a) turn left (b) turn right
  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 5 times (left–right): black–black, white–white, black–white, white–black, white–black. How many times does it 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 58. What does it do?     (a) turn left (b) turn right
  40. 40.⬛ A one-sensor robot follows the edge of a line:
    if (light < 50) { turn right } else { turn left }
    The sensor reads 42. What does it do?     (a) turn left (b) turn right

Answer key

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

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