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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 972 · 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) push it hard (b) speed up (c) close its eyes (d) stop or turn away
  2. 2.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 15 cm. What does the robot do?     (a) go forward (b) turn right
  3. 3.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 33 cm. What does the robot do?     (a) go forward (b) turn right
  4. 4.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  5. 5.🤖 A robot is 39 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  6. 6.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 15. What does the robot do?     (a) go forward (b) turn left (c) stop
  7. 7.🤖 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)?
  8. 8.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the else part (b) the if part (c) neither part (d) both parts
  9. 9.🤖 A robot is 60 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  10. 10.🤖 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
  11. 11.🤖 A robot is 71 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 60. What does the robot do?     (a) turn left (b) go forward (c) stop
  13. 13.🤖 What does an “if” let a robot do? (a) go faster always (b) choose using a sensor (c) skip all sensors (d) charge itself
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 34 cm and the light reading is 60. What does the robot do?     (a) go forward (b) turn left (c) stop
  15. 15.🤖 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
  16. 16.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 60. What does the robot do?     (a) stop (b) go forward (c) turn left
  17. 17.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 31 cm and the light reading is 75. What does the robot do?     (a) turn left (b) stop (c) go forward
  18. 18.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 80. What does the robot do?     (a) turn left (b) go forward (c) stop
  19. 19.🤖 A robot is 62 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 (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
  21. 21.🤖 if (bumper is pressed) { back up and turn left } else { go forward }
    The bumper is not pressed. What does the robot do?     (a) back up and turn left (b) go forward
  22. 22.🤖 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)?
  23. 23.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 12 cm and the light reading is 55. What does the robot do?     (a) turn left (b) go forward (c) stop
  24. 24.🤖 A robot is 37 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 (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
  26. 26.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 41 cm. What does the robot do?     (a) turn right (b) go forward
  27. 27.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 85. What does the robot do?     (a) turn left (b) stop (c) go forward
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 14 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  29. 29.🤖 A robot is 98 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  30. 30.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 1 cm. What does the robot do?     (a) go forward (b) turn right
  31. 31.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 22 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 A robot is 97 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  33. 33.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 37 cm. What does the robot do?     (a) turn right (b) go forward
  34. 34.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  35. 35.🤖 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
  36. 36.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 15 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  37. 37.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 20. What does the robot do?     (a) stop (b) go forward (c) turn left
  38. 38.🤖 A robot is 85 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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 7 cm and the light reading is 20. What does the robot do?     (a) go forward (b) turn left (c) stop
  40. 40.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 27 cm and the light reading is 80. What does the robot do?     (a) stop (b) go forward (c) turn left

Answer key

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

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