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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 366 · 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 < 30) { turn right } else { go forward }
    The distance sensor reads 34 cm. What does the robot do?     (a) go forward (b) turn right
  2. 2.🤖 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
  3. 3.🤖 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
  4. 4.🤖 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
  5. 5.🤖 A robot is 76 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  6. 6.🤖 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
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 65. What does the robot do?     (a) stop (b) go forward (c) turn left
  8. 8.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 6 cm. What does the robot do?     (a) turn right (b) go forward
  9. 9.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) turn right (b) go forward
  10. 10.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 20. What does the robot do?     (a) stop (b) turn left (c) go forward
  11. 11.🤖 What does an “if” let a robot do? (a) go faster always (b) choose using a sensor (c) charge itself (d) skip all sensors
  12. 12.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 36 cm and the light reading is 80. What does the robot do?     (a) turn left (b) stop (c) go forward
  13. 13.🤖 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)?
  14. 14.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 60. What does the robot do?     (a) go forward (b) turn left (c) stop
  15. 15.🤖 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
  16. 16.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) the if part (b) the else part (c) neither part (d) both parts
  17. 17.🤖 A robot is 74 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 17 cm and the light reading is 70. 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 7 cm and the light reading is 55. What does the robot do?     (a) go forward (b) stop (c) turn left
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 10. What does the robot do?     (a) go forward (b) turn left (c) stop
  21. 21.🤖 A robot is 87 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  22. 22.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 37 cm and the light reading is 55. 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 22 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 Obstacle avoiding: what should a robot do when something is close? (a) speed up (b) close its eyes (c) stop or turn away (d) push it hard
  25. 25.🤖 A robot is 61 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  26. 26.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 8 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 32 cm and the light reading is 20. What does the robot do?     (a) turn left (b) stop (c) go forward
  28. 28.🤖 A robot is 63 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 38 cm and the light reading is 60. What does the robot do?     (a) go forward (b) turn left (c) stop
  30. 30.🤖 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)?
  31. 31.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 11 cm. What does the robot do?     (a) turn right (b) go forward
  32. 32.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 16 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  33. 33.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 14 cm. What does the robot do?     (a) go forward (b) turn right
  34. 34.🤖 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
  35. 35.🤖 A robot is 75 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  36. 36.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) turn right (b) go forward
  37. 37.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 28 cm. What does the robot do?     (a) turn right (b) go forward
  38. 38.🤖 A robot is 91 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  39. 39.🤖 A robot is 42 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right

Answer key

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

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