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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 776 · 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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 19 cm and the light reading is 55. What does the robot do?     (a) turn left (b) go forward (c) stop
  2. 2.🤖 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
  3. 3.🤖 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
  4. 4.🤖 Obstacle avoiding: what should a robot do when something is close? (a) close its eyes (b) push it hard (c) speed up (d) stop or turn away
  5. 5.🤖 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
  6. 6.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 50. What does the robot do?     (a) stop (b) go forward (c) turn left
  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 < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  9. 9.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 85. What does the robot do?     (a) turn left (b) go forward (c) stop
  10. 10.🤖 What does an “if” let a robot do? (a) go faster always (b) choose using a sensor (c) skip all sensors (d) charge itself
  11. 11.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 25 cm and the light reading is 60. What does the robot do?     (a) stop (b) turn left (c) go forward
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 50. What does the robot do?     (a) go forward (b) stop (c) turn left
  13. 13.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) go forward (b) turn right
  14. 14.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) turn right (b) go forward
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 20. What does the robot do?     (a) stop (b) go forward (c) turn left
  16. 16.🤖 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
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 65. What does the robot do?     (a) go forward (b) turn left (c) stop
  18. 18.🤖 A robot is 55 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  19. 19.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 70. What does the robot do?     (a) turn left (b) stop (c) go forward
  21. 21.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is pressed. What does the robot do?     (a) go forward (b) back up and turn left
  22. 22.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  23. 23.🤖 A robot is 92 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 8 cm and the light reading is 20. What does the robot do?     (a) go forward (b) stop (c) turn left
  25. 25.🤖 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
  26. 26.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 85. What does the robot do?     (a) go forward (b) turn left (c) stop
  27. 27.🤖 A robot is 44 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  28. 28.🤖 A robot is 77 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 11 cm and the light reading is 60. What does the robot do?     (a) go forward (b) stop (c) turn left
  30. 30.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 20. What does the robot do?     (a) go forward (b) turn left (c) stop
  31. 31.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 29 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward
  33. 33.🤖 A robot is 76 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  34. 34.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 38 cm. What does the robot do?     (a) go forward (b) turn right
  35. 35.🤖 A robot is 109 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  36. 36.🤖 A robot is 84 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  37. 37.🤖 A robot is 88 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) { turn right } else { go forward }
    The distance sensor reads 8 cm. What does the robot do?     (a) go forward (b) turn right
  39. 39.🤖 A robot is 72 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 27 cm. What does the robot do?     (a) turn right (b) go forward

Answer key

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

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