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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 636 · 40 questions
TalentJR

Robot tip (True → if, false → else): Put the reading into the condition: true → the if part, false → the else part. < means strictly less; an equal reading makes it false. else if: check the conditions from the top; the first true one wins. while: repeat until the condition is false.

NameDateTime takenScore ___ / 40
  1. 1.🤖 A robot is 50 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  2. 2.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) go forward (b) back up and turn left
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 65. What does the robot do?     (a) go forward (b) turn left (c) stop
  4. 4.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 20. What does the robot do?     (a) go forward (b) turn left (c) stop
  5. 5.🤖 What does an “if” let a robot do? (a) skip all sensors (b) go faster always (c) choose using a sensor (d) charge itself
  6. 6.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 13 cm. What does the robot do?     (a) go forward (b) turn right
  7. 7.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) back up and turn right (b) go forward
  8. 8.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) turn right (b) go forward
  9. 9.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  10. 10.🤖 A robot is 70 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  11. 11.🤖 A robot is 33 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  12. 12.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) go forward (b) turn right
  13. 13.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) go forward (b) turn right
  14. 14.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) neither part (c) the else part (d) both parts
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 20. What does the robot do?     (a) go forward (b) turn left (c) stop
  16. 16.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 10 cm. What does the robot do?     (a) turn right (b) go forward
  17. 17.🤖 A robot is 108 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 55. What does the robot do?     (a) stop (b) turn left (c) go forward
  19. 19.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 24 cm and the light reading is 15. What does the robot do?     (a) go forward (b) turn left (c) stop
  20. 20.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) close its eyes (c) stop or turn away (d) speed up
  21. 21.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 6 cm. What does the robot do?     (a) go forward (b) turn right
  22. 22.🤖 A robot is 58 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  23. 23.🤖 A robot is 106 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  24. 24.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 34 cm and the light reading is 55. What does the robot do?     (a) stop (b) turn left (c) go forward
  25. 25.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 28 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 25. What does the robot do?     (a) stop (b) turn left (c) go forward
  27. 27.🤖 A robot is 84 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 25. What does the robot do?     (a) stop (b) go forward (c) turn left
  29. 29.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) turn right (b) go forward
  30. 30.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) turn right (b) go forward
  31. 31.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is pressed. What does the robot do?     (a) back up and turn right (b) go forward
  33. 33.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 50. What does the robot do?     (a) stop (b) go forward (c) turn left
  34. 34.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  35. 35.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 35. What does the robot do?     (a) stop (b) go forward (c) turn left
  36. 36.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  37. 37.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 9 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 A robot is 82 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  39. 39.🤖 A robot is 59 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 A robot is 72 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?

Answer key

  1. 20
  2. go forward
  3. go forward
  4. stop
  5. choose using a sensor
  6. turn right
  7. go forward
  8. go forward
  9. turn right
  10. 5
  11. 13
  12. turn right
  13. go forward
  14. the else part
  15. turn left
  16. go forward
  17. 9
  18. go forward
  19. turn left
  20. stop or turn away
  21. turn right
  22. 18
  23. 16
  24. go forward
  25. go forward
  26. stop
  27. 7
  28. turn left
  29. go forward
  30. turn right
  31. go forward
  32. back up and turn right
  33. go forward
  34. go forward
  35. go forward
  36. 2
  37. turn right
  38. 12
  39. 4
  40. 6

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