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Robotics Worksheet: Robot If / Else

Robotics lesson 23: If / else with sensors · Set 775 · 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.🤖 What does an “if” let a robot do? (a) charge itself (b) skip all sensors (c) go faster always (d) choose using a sensor
  2. 2.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 65. What does the robot do?     (a) go forward (b) turn left (c) stop
  3. 3.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 30 cm and the light reading is 15. What does the robot do?     (a) go forward (b) stop (c) turn left
  4. 4.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 32 cm and the light reading is 70. What does the robot do?     (a) turn left (b) go forward (c) stop
  5. 5.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 90. What does the robot do?     (a) stop (b) go forward (c) turn left
  6. 6.🤖 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)?
  7. 7.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 9 cm and the light reading is 50. What does the robot do?     (a) go forward (b) turn left (c) stop
  8. 8.🤖 A robot is 45 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How far from the wall does it stop (in cm)?
  9. 9.🤖 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)?
  10. 10.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 3 cm. What does the robot do?     (a) go forward (b) turn right
  11. 11.🤖 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
  12. 12.🤖 A robot is 38 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  13. 13.🤖 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
  14. 14.🤖 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
  15. 15.🤖 In “if (distance < 20)”, what runs when the distance is exactly 20? (a) both parts (b) the else part (c) neither part (d) the if part
  16. 16.🤖 A robot is 33 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  17. 17.🤖 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
  18. 18.🤖 if (distance < 25) { turn right } else { go forward }
    The distance sensor reads 25 cm. What does the robot do?     (a) turn right (b) go forward
  19. 19.🤖 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
  20. 20.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 22 cm and the light reading is 65. What does the robot do?     (a) turn left (b) stop (c) go forward
  21. 21.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 19 cm. What does the robot do?     (a) turn right (b) go forward
  22. 22.🤖 A robot is 35 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.🤖 A robot is 42 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.🤖 A robot is 82 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  25. 25.🤖 A robot is 71 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) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 18 cm and the light reading is 75. What does the robot do?     (a) go forward (b) turn left (c) stop
  27. 27.🤖 A robot is 46 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  28. 28.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 33 cm and the light reading is 75. What does the robot do?     (a) turn left (b) go forward (c) stop
  29. 29.🤖 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
  30. 30.🤖 A robot is 72 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 17 cm. What does the robot do?     (a) go forward (b) turn right
  32. 32.🤖 if (distance < 30) { turn right } else { go forward }
    The distance sensor reads 31 cm. What does the robot do?     (a) go forward (b) turn right
  33. 33.🤖 if (distance < 15) { turn right } else { go forward }
    The distance sensor reads 7 cm. What does the robot do?     (a) turn right (b) go forward
  34. 34.🤖 A robot is 81 cm from a wall. It runs:
    while (distance > 20) { forward 10 cm }
    stop
    How many times does it move forward?
  35. 35.🤖 A robot is 81 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.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 5 cm and the light reading is 10. What does the robot do?     (a) stop (b) turn left (c) go forward
  37. 37.🤖 if (distance < 10) { turn right } else { go forward }
    The distance sensor reads 21 cm. What does the robot do?     (a) go forward (b) turn right
  38. 38.🤖 if (distance < 15) { stop } else if (light < 30) { turn left } else { go forward }
    The distance is 13 cm and the light reading is 45. What does the robot do?     (a) stop (b) go forward (c) turn left
  39. 39.🤖 if (distance < 20) { turn right } else { go forward }
    The distance sensor reads 20 cm. What does the robot do?     (a) go forward (b) turn right
  40. 40.🤖 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

Answer key

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

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