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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 29 · 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.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) stop or turn away (d) speed up
  2. 2.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) go forward (b) turn right
  3. 3.🤖 A robot is 71 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  4. 4.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 24 cm. What does the robot do?     (a) go forward (b) turn right
  5. 5.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) go forward (b) back up and turn right
  6. 6.🤖 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
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 10. What does the robot do?     (a) go forward (b) stop (c) turn left
  8. 8.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) go forward (b) turn right
  9. 9.🤖 What does an “if” let a robot do? (a) choose using a sensor (b) go faster always (c) skip all sensors (d) charge itself
  10. 10.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) turn right (b) go forward
  11. 11.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) back up and turn left (b) go forward
  12. 12.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward
  13. 13.🤖 A robot is 31 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  14. 14.🤖 A robot is 41 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 40 cm and the light reading is 90. What does the robot do?     (a) go forward (b) stop (c) turn left
  16. 16.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the else part (b) both parts (c) the if part (d) neither part
  17. 17.🤖 A robot is 91 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 65. What does the robot do?     (a) turn left (b) stop (c) go forward
  19. 19.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 4 cm. What does the robot do?     (a) go forward (b) turn right
  20. 20.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 26 cm. What does the robot do?     (a) go forward (b) turn right
  21. 21.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) go forward (b) turn right
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 15. What does the robot do?     (a) go forward (b) turn left (c) stop
  23. 23.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 12 cm. What does the robot do?     (a) go forward (b) turn right
  24. 24.🤖 A robot is 34 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  25. 25.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 35 cm and the light reading is 50. What does the robot do?     (a) stop (b) go forward (c) turn left
  26. 26.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) go forward (b) turn right
  27. 27.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 25 cm and the light reading is 75. What does the robot do?     (a) stop (b) turn left (c) go forward
  28. 28.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) go forward (b) turn right
  29. 29.🤖 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
  30. 30.🤖 A robot is 76 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  31. 31.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 25. What does the robot do?     (a) stop (b) turn left (c) go forward
  33. 33.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) turn right (b) go forward
  34. 34.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 39 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 30 cm and the light reading is 60. What does the robot do?     (a) turn left (b) stop (c) go forward
  36. 36.🤖 A robot is 51 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  37. 37.🤖 A robot is 36 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 36 cm and the light reading is 10. What does the robot do?     (a) go forward (b) stop (c) turn left
  39. 39.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 85. What does the robot do?     (a) turn left (b) go forward (c) stop
  40. 40.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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