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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 252 · 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 39 cm. What does the robot do?     (a) turn right (b) go forward
  2. 2.🤖 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
  3. 3.🤖 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
  4. 4.🤖 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
  5. 5.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) choose using a sensor (d) go faster always
  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 65. What does the robot do?     (a) turn left (b) go forward (c) stop
  7. 7.🤖 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
  8. 8.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 39 cm and the light reading is 10. What does the robot do?     (a) stop (b) go forward (c) turn left
  9. 9.🤖 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
  10. 10.🤖 A robot is 92 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 75 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  12. 12.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 17 cm. What does the robot do?     (a) go forward (b) turn right
  13. 13.🤖 A robot is 69 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  14. 14.🤖 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
  15. 15.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 10 cm and the light reading is 90. What does the robot do?     (a) turn left (b) stop (c) go forward
  16. 16.🤖 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
  17. 17.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the else part (c) the if part (d) neither part
  18. 18.🤖 Obstacle avoiding: what should a robot do when something is close? (a) push it hard (b) speed up (c) stop or turn away (d) close its eyes
  19. 19.🤖 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)?
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 60. What does the robot do?     (a) turn left (b) stop (c) go forward
  21. 21.🤖 if (bumper is pressed) { back up and turn right } else { go forward }
    The bumper is pressed. What does the robot do?     (a) go forward (b) back up and turn right
  22. 22.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 16 cm. What does the robot do?     (a) turn right (b) go forward
  23. 23.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) turn right (b) go forward
  24. 24.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 32 cm. What does the robot do?     (a) go forward (b) turn right
  25. 25.🤖 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) turn left (c) stop
  26. 26.🤖 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)?
  27. 27.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 6 cm and the light reading is 65. What does the robot do?     (a) turn left (b) stop (c) go forward
  28. 28.🤖 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
  29. 29.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 80. What does the robot do?     (a) turn left (b) stop (c) go forward
  30. 30.🤖 A robot is 101 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  31. 31.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 6 cm and the light reading is 85. What does the robot do?     (a) turn left (b) stop (c) go forward
  32. 32.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 30 cm. What does the robot do?     (a) turn right (b) go forward
  33. 33.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 23 cm. What does the robot do?     (a) turn right (b) go forward
  34. 34.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) turn right (b) go forward
  35. 35.🤖 A robot is 73 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  36. 36.🤖 A robot is 68 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 85 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.🤖 A robot is 70 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 65 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  40. 40.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 26 cm and the light reading is 30. What does the robot do?     (a) stop (b) go forward (c) turn left

Answer key

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

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